A STUDY OF THE INTERFACE USABILITY ISSUES OF MOBILE LEARNING APPLICATIONS FOR SMART PHONES FROM THE USER’S PERSPECTIVE

International Journal on Integrating Technology in Education (IJITE) Vol.3, No.4, December 2014
DOI :10.5121/ijite.2014.3401 1
A STUDY OF THE INTERFACE USABILITY ISSUES OF
MOBILE LEARNING APPLICATIONS FOR SMART
PHONES FROM THE USER’S PERSPECTIVE
Abdalha Ali, Muasaad Alrasheedi, Abdelkader Ouda and Luiz Fernando Capretz
Department of Electrical and Computer Engineering, Western University, London
Ontario, N6A5B9, Canada
ABSTRACT
A conceptual framework for measuring the usability characteristics of mobile learning (m-Learning)
application has been developed. Furthermore, a software prototype for smartphones to assess usability
issues of m-Learning applications has also been designed and implemented. This prototype has been
developed, using Java language and the Android Software Development Kit, based on the recommended
guidelines of the proposed conceptual framework. The usability of the proposed model was compared to a
generally available similar mobile application (based on the Blackboard) by conducting a questionnaire-
based survey at Western University. The two models were evaluated in terms of ease of use, user
satisfaction, attractiveness, and learnability. The results of the questionnaire showed that the participants
considered the user interface based on our proposed framework more user-friendly as compared to the
Blackboard-based user interface.
KEYWORDS
Mobile Learning; Quality Issues; Usability Issue; User interface; User-Centred Design; Empirical Study
1.INTRODUCTION
Mobile devices are increasingly becoming integrated into various aspects of our daily lives. One
area is in the educational sector, where mobile phones are being used as the platform for teaching
and learning. However, unlike personal computers, the screen size and resolution restrict mobile
phones in displaying content [1]. Learning by using specifically smartphones, is being integrated
within existing education systems to support real-time communication and deliver learning
materials.
For instance, smartphones are being used in many universities as a classroom tool to engage and
support students in communicative, collaborative, supportive, and constructive activities.
Additionally, mobile technologies enable individual learners to build knowledge and construct
understandings; in this they facilitate a change in the pattern of work activity/learning [2].
However, mobile applications used for educational purposes have a complex user interface (UI)
with many hidden options. There is already a great interest in designing and developing attractive,
user-friendly mobile applications to gain the acceptance of end user. Further, in order to be
acceptable to a wider audience, the applications need to be both robust and of a very high quality
[3].

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Due to the significant diffusion of mobile technologies, most students today already own mobile
devices. Hence, the technology is a strong contender to be the next “big thing” in educational
platforms [4]. Mobile technology can deliver educational content in several ways. For instance,
Wang et al. [5] reported that mobile phones could be used to deliver online courses to university
students. In fact, the multitude of ways in which mobile technology can be used in the educational
sector, prompted Prensky [6] to note that students will be able to learn “anything, if developers
designed it right”.
Also, the demand for learning anywhere and anytime has specified the need for a new type of
electronic learning known as m-Learning to take advantage of mobile devices which are
becoming increasingly popular [7]. M-learning is an education mode in which students can use
mobile communication terminals to assist them in learning [8].
One of the key components of a successful and acceptable educational application is ease of use.
Several high quality applications available in the market actually lose out because of their
complex application and unattractive and confusing user interface. Thus, when designing a user
interface for mobile phones, especially for education purposes, the user requirements of these
devices should be considered [3].
Many usability guidelines are used for designing desktop applications [9][10]. However, these
guidelines cannot be utilized to design and develop m-learning applications, simply because
neither addresses the aspect of mobility not the obvious limitations of the mobile devices, like
such as screen size, and the need for wireless connectivity [1]. There is a singular lack of reliable
usability guidelines, specifically meant for designing and developing m-learning with user-
friendly interfaces. While research conducted on the success factors of m-Learning clearly show
that usability and related aspects are one the core requirements, the specific ways in which this
can be addressed is are lacking [12]. In fact, usability has been less extensively covered than the
technological aspects of the m-learning. Mobile technology can be successful as an educational
platform only when the future research into the area of m-Learning includes fruitful discussion in
of all the aspects of usability: – learnability, understandability, ease of use, effectiveness, and
efficiency of mobile applications [13].
The experience of end users is extremely important to the success of m-Learning. Therefore, a
mobile phone application targeted towards education must be designed and developed keeping in
mind ease of use, usefulness, and attitude and intention to use that will help ensure a high level of
acceptance [14]. Assessment must be conducted to precisely identify where improvement is
required. Therefore, the main purpose of this research study is to develop a framework for
measuring the quality aspects of m-Learning. Using this framework, existing m-Learning
applications can be assessed in terms of their usability. In addition, a prototype application has
been developed composed of two user interfaces, Model A and Model B. Model A has been
designed and developed based on a user interface adopted from the Blackboard website [15],
while Model B has been developed following the Android SDK recommendation and using the
proposed framework as a guideline. The prototype has been used for assessing the framework by
empirical evaluation, validation, and comparison of usability issues of the model using the
proposed framework as a guideline.
The paper is organized into the following sections. Section 2 presents the literature review on the
subject as well as work in related areas. Section 3 describes the development and theoretical
assessment of the theoretical framework. Section 4 presents the assessment methodology used for
evaluating the framework. Section 5 presents the results of an analysis, and the discussion of the

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results is presented in section 6. Research conclusions and possible directions of future research
work are presented in section 7.
2.LITERATURE REVIEW
In this section we discuss literature that deals with the usability and summarize a selection of the
most relevant findings. To start, in the ISO 9241-11 (1997) [16] standard, usability is defined as
“the extent to which a product can be used by specified users to achieve specified goals with
effectiveness, efficiency and satisfaction in a specified context of use”. However, ISO/IEC 9126-
1 (2001) [17], states that usability is “the capability of the software product to be understood,
learned, used and attractive to the user, when used under specified conditions.” [18], on the other
hand, emphasize that there is a great deal of literature available that addresses usability, user
interface design, and related topics for mobile devices. A mobile application must be developed
and designed with respect to user technological ability, skills, and language proficiency. This
forces developers to be very careful with design issues in order to maximize the level of usability
with all of its sub-characteristics. Ziefle and Bay [19] demonstrate that awareness of user
interface structure is one of the most important issues concerning cell phones.
On the other hand, Jarvela et al. [20] studied how to help users participate in collaborative
learning using smartphones. The researchers utilized a mobile lecture interaction tool to
encourage students in higher education to participate in a class discussion. This tool enabled
participants to ask and answer questions, as well as to rate classmate questions. The main purpose
of this survey was to get student feedback on the usability of the tool. The feedback showed that
mobile tools with a high level of usability will definitely increase their engagement in
discussions. Mobile technology allows the users to communicate instantly; this characteristic
plays a vital role in a successful m-Learning environment. However, usability issues are found to
be important factors in the learners’ high satisfaction level with the cooperative learning available
through the system.
The Mobile System Analysis and Design (MOSAD) application [21] is a mobile application used
as a revision tool for the System Analysis and Design (SAD) course at University Technology
Petronas. The researchers’ main goal was to design an m-Learning application that allows
students to review and read notes during their spare time, and more importantly, to evaluate this
application by considering some design issues that could be modified to improve its usability.
After the application was designed, a heuristic evaluation was completed to measure its level of
usability. Many tests were conducted, and the purpose of those tests was to receive feedback from
participants so the level of usability of this application could be determined. The results indicate
that adding some features to the design will be useful and will improve the overall usability of the
application.
3.DEVELOPMENT OF THEORETICAL FRAMEWORK
In this section, the development of framework for assessment of the m-Learning platform is
described. First, the technical and non-technical quality aspects, the basis of an m-Learning
platform assessment, are discussed. This information will be used to develop the actual
framework. A general theoretical analysis of the framework is also presented in this section.

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3.1.Development of Theoretical Framework Assessing Usability of M-Learning
Platform
The framework is shown in Figure 1 below. Basically, this framework is a combination of
structural factors [23]: rules, goals, outcomes, competition, interaction, and representation. It also
integrates dimensions of the learning context [24]: identity, time-location, facility (mobile
phones), activity, learner on the move, and community. A similar framework has been introduced
by Parsons and Ryu, [13]; however, we have identified three design issues: usability,
communication, and interactivity.
These three design issues can be added to previous design issues identified by Parsons and Ryu
[13]: learning on the move, media type, collaboration, user role, and profile. First, these design
issues have been linked to the dimensions of learning context and then to the structural factors.
From these two steps we target social skills and team building, new knowledge, and improved
skills. Key features of the framework are that it identifies the importance of design issues, the
dimensions of the learning context, and structural factors in order to address learning objectives
that have both a user focus and a platform focus. The usability design issue, which includes ease
of use and understanding, can be achieved if users are able to use the applications (usability
design issue). This can also be achieved by using identifiers of each user that must be unique in
the name space, and that are accessed by the application via a log-on system (with a user name,
password, and/or special devices such as smart cards or fingerprint reader). All these identifiers
are classified under the “identity dimension” within the learning context. Furthermore, ease of use
and the ability to utilize specific identifiers for each user will enable them to perform tasks – such
as reviewing the lessons, doing assignments, and participating in group sessions with other users
– with, of course, the support of mobile devices (structural factors: business rules and learning
roles).
Finally, the learning objectives are addressed; these may include improving skills, acquiring new
knowledge, social skills, or team building. However, as we have mentioned in this paper, each
design issue may be linked with more than one of the dimensions within the learning content. In
summary, most of the components of this framework will relate to each other in one way or
another. For example, usability factors can be affected by more than one of the learning contexts
that include identity, learner, activity, time-location, facility (mobile phone), and the software
engineering community [25] [26]. On the other hand, each dimension of the learning context may
be linked to more than one of the structural factors, which in turn, are linked to different learning
objectives.

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Figure 1. A Conceptual Framework for Measuring Quality Aspects of m-Learning.
3.2. Theoretical Analysis of Proposed Framework
The relationships among the quality of use, internal quality, and external quality metrics are
shown in Figure 2 below. We can see that if extensions are applied to the ISO/IEC metrics [18], it
is possible to map these metrics with our framework in order to measure the design issues related
to learning on the move, user roles and profiles, media type, and usability issues. However,
additional metrics are needed to complement the context of the use dimensions of the quality in
use metrics.
Figure 2. The Relationships between the Quality metrics based on ISO/IEC
To analyze our framework, we consider a case study and the metrics that ISO/IEC provides. The
most suitable example is the Busuu project [27]. The Busuu project is an online social network
application in which learners can assist each other to improve their language skills. The
application provides learning units for twelve different languages, and it can be downloaded for
use on mobile phones. This application was designed to enable users to set up a profile and
practice (quality metrics of user roles and profiles). Software developers were careful with the
learning content that displayed on screens; they targeted as much learning content as possible
(quality metric of media type). On the other hand, since the application can be downloaded to
mobile phones, users are free to use it wherever network connectivity is available (quality metrics
of learning on the move). In addition, each individual user of this application is not only a student
of a foreign language, but also a tutor of his or her own mother tongue. One user can
communicate and interact with other users (quality metrics of communication, collaboration, and
interactivity). However, by using some of the appropriate metrics from ISO/IEC (e.g.,
functionality, scalability, and service quality), we will be able to measure the quality of m-
Learning applications.

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Table 1 shows the analysis of the Busuu project based on our framework. In this case, the analysis
walks us through from the objectives to the design issues. The purpose of this reverse engineering
is to measure the success of the Busuu project and also to determine the design issues our
framework can assess and address.
Table 1. Analysis of Busuu Project Based on our Framework.
Objective Learning Experience Learning Contests Design Issues
Initial Interaction:
1. Exploring,
discovering and
becoming
familiar with the
software.
2. Communicating,
interacting, and
collaborating
with peers by
asking and
answering
questions.
Rules: Business rules,
learning roles:
Different users meet in
the context of a
simulation.
Outcome and
Feedback: Asking
questions and getting
answers.
Goals and objectives:
To become familiar
with the application.
Conflict, competition,
challenge, opposition:
Discussing and
challenging opinions
(teamwork and new
skills).
Interaction, blogs,
wikis, discussion
groups, test,
framework: One to
one, one to many, and
many to one.
Identity: User name
and password for each
individual user.
Learner: Different
users.
Activity: To engage
in participatory
simulation of a
dynamic system.
Time-Location: Co-
located same time and
different time.
Facility: Different
mobile devices.
Community:
Different users with
different backgrounds
using the mobile
devices with the
support of wireless
connectivity can
discuss many different
topics in order to
improve. language
skills
User roles and
profiles:
New Users: Few ideas
on how to use the
application.
Learn on the move:
Mobile devices with the
support of wireless
connectivity.
Media type: Text,
images, comprehensive
audio-visual learning
material with photos
and recordings by
native speakers, avoid
information overload
Communication,
collaboration and
interactivity: Users can
communicate and
collaborate using text,
verbal, and video-chat
communication support
Learning New
Language:
By sharing and
exchanging
information between
users provides new
knowledge that will
help them to
improve language
skills and to
improve the
following
objectives:
1. Team building
2. Social skills
3. New knowledge
4. Improved skills.
Rules: Business rules,
learning roles:
Lessons, tutorials,
assignments, and group
sessions with the
support of mobile
devices.
Goals and objectives:
To get and give
answers and to engage
in participatory
simulation to learn a
new language and/or
improve language
skills.
Conflict, competition,
challenge, opposition:
Discussing and
challenging opinions.
Interaction, blogs,
wikis, discussion
groups, test,
framework: One to
one, one to many, and
many to one.
Identity: Different
users.
Learner: Different
users.
Activity: Explaining
and discussing
participative
experience.
Time-Location: Co-
located same time and
different time.
Facility: Different
mobile devices.
Community:
Different users with
different backgrounds
using the mobile
devices with the
support of wireless
connectivity can
discuss many different
topics in order to
improve language
skills.
User role: Participant
in group discussion
(users).
Learn on the move:
Mobile devices with the
support of wireless
connectivity.
Media type: Text,
images, comprehensive
audio-visual learning
material with photos
and recordings by
native speakers,
vocabulary and key
phrases, dialogues,
audio, podcasts and
PDFs and avoid
information overload.
Communication,
collaboration and
interactivity: Users can
communicate and
collaborate using text,
verbal, and video-chat
communication support.

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The results indicate that the Busuu project is successful since it has met all of the requirements of
our framework. Also, the success of this project can be determined by the number of downloads.
In less than two years, the Bussu project’s applications have already been downloaded more than
10 million times [27]. However, one of the goals of our framework is that it should be used to
support forward engineering and be used as a design guideline for developing m-Learning
applications. Usability has been stated as one of the most important fundamentals of m-Learning
applications [28][29]. These weaknesses in an application will prevent users from being efficient,
effective, and productive: i) difficult to use, ii) a difficult-to-learn user interface, iii) user interface
that is difficult to remember how to reuse; iv) learning content structure that is unclear; v) a
process workflow that is difficult to perform [22][30]. The user interface must be effective and
easy to use; this will help users to focus on their learning goals, learning content, and activities
instead of how the system works; moreover, utilizing design guidelines are vital in developing
learning systems [22][31].
3.3. Development of Prototype for Assessing the Framework
The interface of the Main Menu of the developed application is shown in Figure 3. The prototype
application consists of two user interfaces named Model A and Model B. Model A was designed
and developed based on a user interface adopted from the Blackboard website, while Model B
was developed following Android SDK recommendations and using our framework as a
guideline.
Figure 3. Main Menu of the Prototype Application
The prototype uses familiar terminologies in this prototype application that could be seen on most
of WebCT such as “Course Map”, “Course Information”, “Assignments”, “Announcements”,
“Discussion Board”, “Media”, “Grades”, and “Blogs”. This can be seen in Figures 4 and 5 below
for Model A (Blackboard based) and Model B (based on our framework) respectively. A
comparison of UI for Model A in Figure 4 and UI for Model B in Figure 5 shows that Model B’s
UI is distinctive and easier to understand with large and self-explaining icons. In contrast Model
A’s user interface has smaller and less easily understood options. This is also evident in the Blog
icons for Model A and Model B in Figure 6 and Figure 7 respectively: Model B is distinctive and
easier to understand. The purpose for developing these different user interfaces is to find the best
way to design and develop a user-friendly user interface for mobile applications to increase the
usability level of these applications.

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Figure 4. Model A based on Blackboard
Figure 5. Model B based on Android
Recommendations and our framework as a
guideline
Figure 6. Blog’s Icon in Model A
Figure 7. Blog’s Icon in Model B
4.RESEARCH METHODOLOGY
4.1Research participants
The sample population of the result was undergraduate students at Western University in Canada.
The population was limited to second- and third-year students in the undergraduate program in
the Software Engineering department. Questionnaires were handed to the students and a total of
96 completed questionnaires from the complete population of the present study. These students
were in the 19-23 age group and were both male and female students enrolled in the software
engineering program
.

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4.2. Instrument
The instrument used for analysis was a questionnaire survey handed out to interested participants
who took part in a live assessment of the two Models of m-Learning developed as a part of this
study. The m-Learning platform prototype developed for this study has used for a heuristic
evaluation as a technique to measure usability factors. Heuristic evaluation is an engineering
method for easy, quick, and cheap evaluation of a user interface design [11]. It is known as one of
the most popular usability inspection methods, and it is done as a systematic inspection of user
interface design for usability [11]. As mentioned, a usability questionnaire was conducted to
evaluate the usability issues of the prototype application among 96 students. However, using this
technique and giving the participants real mobile devices, allowed participants to use this
application to share opinions regarding their experiences while interacting with the real prototype
application. Participants rated each question from 1 to 5 on a Likert scale (1=very easy, 5=very
difficult).
After they were given the questionnaire survey form they were provided with real smartphones.
The main goal here was to compare the two user interfaces in the four sections and determine
which one of these interfaces is better, in terms of usability sub-characteristics.
4.3. Assessment Method
Upon collecting the data, the level of usability was investigated by evaluating the application user
interfaces, which include ease of use, user satisfaction, and attractiveness and learnability. A
comparison will be made to determine the more user-friendly interface between the two models
that form a part of the prototype.
5.DATA ANALYSIS
The data analysis aims at comparing user interfaces Model A and Model B for smartphone
applications. The specific areas of comparing the two models will be: ease of use, user
satisfaction, attractiveness, and learnability. The sample contains 96 students who used the UI for
the application and finished the survey correspondingly. First a descriptive analysis of the data
collected is presented. After this a comparative analysis of the responses of participants using
Model A and Model B will be presented based on the four aspects mentioned earlier. This will be
followed by the reliability and validity of data. Finally, the association analysis is presented to
ensure that the user evaluates both models independently.
5.1. Descriptive Analysis of Data
For the purpose of analysis, the participant responses for both user interfaces (Model A and
Model B) have been gathered on four aspects of usage: ease of use, user satisfaction,
attractiveness, and learnability. Table 2 below presents the mean and standard deviations of the
participant responses for the four aspects of usage.
Table 2. Statistical Analysis of Data
Mean and SD
Usability sub-characteristics
Ease of Use User satisfaction Attractiveness Learnability
Model A Mean 2.47 2.23 3.16 2.17
Model A SD 0.37 0.27 0.27 0.1
Model B Mean 1.74 1.76 2.05 1.71
Model B SD 0.14 0.19 0.13 0.09

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5.2. Comparative Analysis of Data
As multiple questions were used to evaluate both models in each section the same weight was
given to every question for overall evaluation.
The statistics of “ease of use” sub-characteristic from Table 2 shows that Model B, with a mean
of 1.74, has a lower score than Model A, with a mean of 2.47. This means that participants
consider the user interface of Model B to be easier to use as compared to the user interface of
Model A. The results are corroborated by the standard deviation (SD) of the two models. Model
B with SD 0.14 is lower than the SD of Model A, which is 0.37. This shows that the Model B
responses are more consistent.
The statistics of “user satisfaction” sub-characteristic from Table 2 shows that Model B, with a
mean of 1.76, has a lower score than Model A, with a mean of 2.23. This means that participants
are more satisfied with the user interface of Model B as compared to the user interface of Model
A. The results are corroborated by the standard deviation of the two models. Model B with SD
0.19 is lower than the SD of Model A, which is 0.27. This shows that the Model B responses are
more consistent.
The statistics of “attractiveness” sub-characteristic from Table 2 shows that Model B, with a
mean of 2.05, has a lower score than Model A, with a mean of 3.16. This means that participants
consider the user interface of Model B to be better looking as compared to the user interface of
Model A. The results are corroborated by the standard deviation of the two models. Model B with
SD 0.13 is lower than the SD of Model A, which is 0.27. This shows that the Model B responses
are more consistent.
The statistics of “learnability” sub-characteristic from Table 2 shows that Model B, with a mean
of 1.71, has a lower score than Model A, with a mean of 2.17. This means that participants
consider that it is easier to learn a topic utilizing the user interface of Model B as compared to
learning with the user interface of Model A. The results are corroborated by the SD of the two
models. Model B with SD 0.09 is lower than SD of Model A, which is 0.1. This shows that the
Model B responses are more consistent.
The results of the four sub-characteristics can be averaged to find the overall comparative
performance of Model A and Model B.
5.3. Reliability and validity of data
In order to validate our intuitive understanding regarding the comparison between Model A and
Model B, a paired T-test and F-test is used to test the different scores between Model A and
Model B, as well as the variance differences between the two models. The hypothesis for the test
shown in Table 3 below is that Model B performs the same as Model A. This is tested for each of
the sub-characteristics, resulting in a total of four hypotheses (H1, H2, H3, and H4) to be tested.
In addition to the four hypotheses, a general case hypothesis, H5, is also created by averaging the
results from the four sub-characteristics.
Table 3. Hypothesis for usability sub-characteristics.
Sub Characteristics Hypothesis Statement to be Tested
Ease of Use
Model B performs the same as Model A
User satisfaction
Attractiveness
Learnability

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The outcomes of the reliability and validity analysis are shown in Table 4. For each of the
usability sub-characteristics the test statistics and confidence intervals for both T-test and F-test
are given in the table.
Table 4. Analysis of data using T-test and F-test.
Hypotheses
Paired T-Test Paired F-Test
Test Statistics Test Statistics
Ease of Use 15.0* 1.32*
User satisfaction 10.5* 1.30*
Attractiveness 20.7* 0.70*
Learnability 7.9* 1.37*
General Case 27.3* 1.32*
(*) Significant at p-value < 0.05, and (**) Insignificant at p-value > 0.05
• Ease of Use – From Table 4 above it can be seen that this sub-characteristic, the hypothesis that
Model A and Model B perform the same, is rejected. The hypothesis is rejected because of the
test statistic that is statistically significant at p-vale < 0.05. This indicates that Model A and
Model B have significantly different performance levels from this perspective. In order to
perform variance and consistency analysis, again the hypothesis that Model A and Model B
perform the same is used. In this case, too, the hypothesis is rejected as the test statistic is
significant at p < 0.05. This means that the consistency situation for Model A and Model B is
different in terms of ease of use.
• User Satisfaction – From Table 4 above it can be seen that this sub-characteristic, the hypothesis
that Model A and Model B perform the same, is rejected. The hypothesis is rejected because of
the test statistic that is statistically significant at p-vale < 0.05. This indicates that Model A and
Model B have significantly different performance levels from the user satisfaction perspective. In
order to perform variance and consistency analysis, again the hypothesis that Model A and Model
B perform the same is used. In this case, too, the hypothesis is rejected as the test statistic is
significant at p < 0.05. This means that the consistency situation for Model A and Model B is
different in terms of user satisfaction.
• Attractiveness – From Table 4 above it can be seen that this sub-characteristic, the hypothesis
that Model A and Model B perform the same, is rejected. The hypothesis is rejected because of
the test statistic that is statistically significant at p-vale < 0.05. This indicates that Model A and
Model B have significantly different performance levels from the attractiveness perspective. In
order to perform variance and consistency analysis, again the hypothesis that Model A and Model
B perform the same is used. In this case, too, the hypothesis is rejected as the test statistic is
significant at p < 0.05. This indicates that Model A shows more consistency than Model A in
terms of responses for attractiveness. When the reasons for this result are analyzed, it is found
that attractiveness is more of a subjective judgement and is dependent on an idiosyncratic factor
for each user. Yet another reason for this outcome can be due to the fact that the evaluation of
Model A was more concentrated and focused. Several of the questions in this section were
regarding the colour of the interface. Most of the user interface of Model B has different shades
of red, and the feedback from the users showed an aversion to the colour with several participants
suggesting this colour should not be used.
• Learnability – From Table 4 above it can be seen that for this sub-characteristic, the hypothesis
that Model A and Model B perform the same is rejected. The hypothesis is rejected because of the
test statistic that is statistically significant at p-vale < 0.05. This indicates that Model A and
Model B have significantly different performance levels from the learnability perspective. Thus

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these statistics validate our intuitive understanding that Model B performs better than Model A
(as per the comparative analysis of data in the previous section). In order to perform variance and
consistency analysis, again the hypothesis that Model A and Model B perform the same is used.
In this case, too, the hypothesis is rejected as the test statistic is significant at p < 0.05.
• General Validation - From Table 4 above it can be seen that from the overall general
perspective, the hypothesis that Model A and Model B perform the same is rejected. The
hypothesis is rejected because of the test statistic that is statistically significant at p-vale < 0.05.
This indicates that Model A and Model B have significantly different performance levels from an
overall general perspective. In order to perform variance and consistency analysis, again the
hypothesis that Model A and Model B perform the same is used. In this case, too, the hypothesis
is rejected as the test statistic is significant at p < 0.05. This means that the consistency situation
for Model A and Model B is different in terms of user satisfaction. This indicates that Model B
shows more consistency than Model A
5.4. Association Analysis
For the purpose of this study, the evaluation of both Models A and B has been conducted
simultaneously. Hence, it is essential that the association levels between the evaluation of Models
A and B are tested. This is to check whether the user evaluates Model A and Model B
independently or not. The test is performed on the five hypotheses (H1, H2, H3, H4, and H5) for
each of the four usability sub-characteristics, as depicted in Table 3. One of the methods to check
for association levels in the parametric statistics is to find the Pearson correlation coefficient
between Model A and Model B. Since this is a statistical test, the p-value – i.e., the probability of
obtaining a test-statistic – is observed. The lower the p-value, the less likely that the result if the
null hypothesis is true and, accordingly, the more “significant” is the result in terms of its
statistical significance [36]. The Spearman Coefficient is the counterpart of the Pearson
Coefficient in non-parametric analysis, which defines the correlation between the two models.
The results for the Pearson correlation coefficient and the Spearman Correlation Coefficient are
displayed in Table 5 below.
Table 5. Analysis of the Data Using Pearson and Spearman Correlation Methods.
Hypotheses Correlation Coefficients
Section Pearson Correlation
Coefficient
Spearman Correlation
Coefficient
H1 Ease of Use 0.06** 0.09*
H2 User satisfaction 0.20* 0.21*
H3 Attractiveness -0.010** -0.008**
H4 Learnability 0.22* 0.24*
H5 General Case 0.16* 0.17*
(*) Significant at p-value < 0.05, and (**) Insignificant at p-value > 0.05
• Ease of Use – From Table 5 above it can be seen that the outcomes of the analysis for this sub-
characteristic regarding the association between Model A and Model B are not consistent. In fact
the outcomes are contradictory. The Pearson Correlation Coefficient test is positive (0.06) at P-
Value > 0.05, hence, the hypothesis cannot be rejected. The Spearman Correlation Coefficient
test, on the other hand, is (0.09) at P-Value < 0.05; therefore, the hypothesis is rejected. However,
if we take a closer look at the P-value, we can see that the P-Value for the Spearman coefficient is
(0.027), which is close to the boundary of 0.05. This situation indicates the inaccuracy of this test.
Another possible cause for this situation is that the Spearman coefficient is a non-parametric
association estimation. Therefore, the sample size plays a very important role in the accuracy of

13
this coefficient estimation. Our sample is limited to the 96 students who participated in the
survey. The limited sample size will make the coefficient less accurate. Thus in this case, the
outcome of the Pearson coefficient, which indicate that the evaluation of these two models is
independent, must be accepted as the actual outcome.
• Usage Satisfaction – In the user satisfaction section, The Pearson Correlation Coefficient
between Model A and Model B is positive (0.20) (P-Value < 0.05), and the Spearman Correlation
Coefficient test is also positive (0.21) (P-Value < 0.05). Since the P-Values for the two
Coefficients indicate the significance of the test, it can be seen that both the Pearson Coefficient
and the Spearman Coefficient indicate that we should reject the hypothesis. Therefore, the
evaluation of Model A has a positive relationship with that of Model B, which indicates that the
users who evaluate Model A with a higher score will also tend to evaluate Model B with a higher
score.
• Attractiveness – From the outcomes of the attractiveness section, we find that the P-value for
the Pearson Coefficient and the Spearman Coefficients are negative (-0.010, -0.008) with P-Value
> 0.05. Since the P-Values for the two Coefficients indicate the insignificance of the test, both the
Pearson Coefficient and Spearman Coefficient indicate that the null hypothesis about the
independence situation between these two Models cannot be rejected. However, since
attractiveness is purely a subjective judgment towards the models, the evaluation between Model
A and Model B will be independent.
• Learnability – For the learnability, the Pearson correlation coefficient between Model A and
Model B is positive (0.22) (P-Value < 0.05). Furthermore, the Spearman Correlation Coefficient
test is also positive (0.24) (P-Value < 0.05); the p-values for the two coefficients indicate the
significance of the test. Therefore, the Pearson Coefficient and Spearman Coefficient suggest that
we should reject the hypothesis. Moreover, the evaluation of Model A has a positive relationship
with that of Model B, which suggests that users who evaluated Model A with a higher score also
tend to evaluate Model B with a higher score.
• General Case – Finally, in the general case section, the Pearson Correlation Coefficient between
Model A and Model B is positive (0.16) (P-Value < 0.05), and the Spearman Correlation
Coefficient test is also positive (0.17) (P-Value < 0.05). Since the P-Values for the two
coefficients indicate the significance of the test, the Pearson Coefficient and Spearman
Coefficient indicate that we should reject our hypothesis. Also, the evaluation for Model A has a
positive relationship with that of Model B, suggesting that the users who evaluate Model A with a
higher score also tend to evaluate Model B with a higher score.
6.DISCUSSION OF RESULTS
The prime objective of this work is to propose a conceptual framework for measuring the
usability aspects of m-Learning. Further, the framework was used as a guideline to build a
prototype model of a prototype application for smartphones. This model was compared with
another model based on the Blackboard website on the basis of questionnaire responses from a
survey conducted at the University of Western Ontario. The comparative analysis shows that the
distribution of Model B was smaller than that of Model A. According to our pre-defined options
for the questions, practitioners tend to rank Model B better than model A. In order to support our
intuitive idea of the data, a validation test of the Models was performed.
As the evaluation of the two Models A and B was paired together, the paired T-test was used to
evaluate the difference between the mean of Model A and Model B for each question and the
general case. The F-test was then used to test whether the variance of Model A will be the same

14
as that of Model B in different sections. The results of the analysis showed that the p-value of the
T-test and F-test was less the 0.05, the null hypothesis (i.e., the difference between the mean of
Models A and B is 0) should be rejected.
The samples were further analyzed using the association test to examine whether there is
relationship between when students evaluate Model A and Model B. The key statistics used for
determining this were the Pearson Correlation Coefficient and the Spearman Correlation
Coefficient. After testing the hypothesis it was found that for some questions, students evaluate
Model A and Model B independently. However, the overall results demonstrated the existence of
a positive correlation between the evaluation of Model A and Model B. This means that students
who evaluate Model A higher tend to evaluate Model B higher.
In conclusion, the analysis pointed clearly that Model B would give a superior usability
performance as compared to Model A in terms of the four sub-characteristics used to evaluate
usability: ease of use, user satisfaction, attractiveness, and learnability.
7. CONCLUSION
M-learning applications must be easy to use, learnable, understandable, and attractive as well as
provide an enjoyable experience for users. It is important to meet usability needs for the m-
Learning applications, since user interface plays the most important role for each individual
interaction between the user and his/her smartphone application. However, little attention has
been paid to researching the usability assessment in the area of m-Learning application design.
One of the key contributions of this work is the development of a conceptual framework for
measuring the quality aspects of m-Learning. In addition, a prototype application for smartphones
using the Java Language and an Android Software Development Kit has also been developed by
following the proposed framework as a guideline. We also conducted a questionnaire survey at
Western University to compare this prototype with a model based on the Blackboard website.
While performing the comparative analysis, it was discovered that our model – developed using
our framework as a guideline – performed better than the model developed based on the
Blackboard website in terms ease of use, user satisfaction, attractiveness, and learnability.
This framework can be used as a guideline to support forward and reverse engineering and for use
in the future while developing mobile applications. The key limitation of the analysis is the
limited demographics used (comprising only undergraduate software engineering students) while
conducting the research questionnaire, which means that the results cannot be deemed as
universal. Future research could involve the quality perspective of the learning material itself.
The research can also be extended to assess the design issues of learning-on-the-move,
collaboration, and communication and interactivity.
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Authors
Mr. Abdalha Ali is graduated with a Masters degree in Software Engineering in the
Department of Electrical and Computer Engineering at Western University. He
received his B.A.Sc. in Electrical and Computer Engineering from the University of
Al Jabal Al Gharbi, Libya, in 2005. His research interest includes technology tools
for teaching and the use of mobile devices in education. Mr. Ali worked for more
than 3 years in the Higher Ministry of Education in Libya, where he gained good
experience in project Management. He can be reached at: aali252@uwo.ca
Mr. Muasaad Alrasheedi is a Ph.D. Candidate in the department of Electrical and
Computer Engineering (Software Engineering Program) at Western University,
London, Canada. Mr. Alrasheedi has a Bachelor of Science degree in Information
Technology and Computing From Arab Open University, Saudi Arabia and Master
of Engineering in Technology Innovation Management from Carleton University,
Ottawa, Canada. His research interest is in the mobile learning and emerging
educational technology. He can be reached at: malrash@uwo.ca.
Dr. Abdelkader Ouda is an Assistant Professor in the Department of Electrical and
Computer Engineering at Western University. He received his B.Sc. (Hons) and
M.Sc. degrees in Computer Science and Pure Mathematics from Ain Shams
University, Cairo, Egypt, in 1986, and 1993 respectively, and his Ph.D. degree in
Computer Science from the Western University, Canada in 2005. Dr. Ouda has been
studying, researching, and teaching software engineering at Western University for
12 years. His current research is mainly in Information and networking security. Dr.
Ouda was working for over 14 years in the software development industry, involving
project management, system analysis/consulting, and database design. He can be
reached at: aouda@uwo.ca.
Dr. Luiz Fernando Capretz is a Professor of Software Engineering and Assistant
Dean (IT & e-Learning) at Western University, London, Canada. His research
interests include software engineering, technology-enhanced learning, human factors
in software engineering, and software engineering education. Dr. Capretz has a PhD
in computing science from the University of Newcastle upon Tyne. He is a senior
member of the IEEE, a distinguished member of the ACM, an MBTI certified
practitioner, and a Professional Engineer in Ontario (Canada). He can be reached at:
http://www.eng.uwo.ca/people/lcapretz/default.htm. Email: lcapretz@uwo.ca

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