![3
1. Setup your [Variable View] as follow: Missing value
1=Malay, 2=Chinese, 3=Kadazan/Dusun SD=1, D=2, A=3, SA=4
4= Murut, 5=Others
2. Now you enter the data as below.](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-3-320.jpg)
![4
3. Now, the items for the questionnaire, Q2, Q7, Q10 and Q14 are negative items so the Likert
scale should be reversed. SD =4, D= 3, A=2 and SA = 1.
4. Now you [Recode] the negatively-worded questions into the [same variables]. If you want can
be into [different variables].
5. Select [Transform] in the menu bar and click [Recode into Same Variables] to open the
dialogue box.
6. Move [Q2, Q7, Q10 , Q14] into the [Variables] box then click [Old and New values] to open
the sub-dialogue box.
7. Enter [1] in the [Old Value] box and [4] in the [New Value] box then [Add]. Repeat for 2 → 3,
3 → 2 and 4 → 1.](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-4-320.jpg)
![5
7. Click on [Continue] then [OK]. Now you examine the [Data View] below the scores have been
reversed.
COMPUTE DATA
Now to score students’ attitude towards science, you have to add up the scores for the 14 questions.
There are 2 ways of doing this.
How to total the score for each student in this questionnaire
Method 1: (If you do not want to include the missing items, e.g. Q14)
1. Select [Transform] then [Compute Variable..] to open the dialogue box.](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-5-320.jpg)
![6
2. Type [Total] into [Target Variable] box. Move [Q1] then [+] and repeat until [Q14] then [OK].
3. Now click on [Data View], [Total] is created.](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-6-320.jpg)
![7
Total is added to the [Variable View]
Total value missing because of 999. To
avoid this use Method 2
Method 2: ( Use the [Function group] if you want to include the missing values, e.g. Q14)
1. Select [Transform] then [Compute Variable..] to open the dialogue box.](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-7-320.jpg)
![8
2. Enter [Total] in the [Targer Variable] box. In the [Function group] box select [Statistical] and
[Sum] in the [Functions and Special Variables] box.
3. Click on [ ↑ ] to bring this function into [Numeric Expression] box.](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-8-320.jpg)
![9
4. Move [Q1] to [Numeric Expression] box. Repeat until [Q14] then [OK].
5. Now you examine the [Data View] below.
The Total added for the missing values](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-9-320.jpg)
![10
How to obtain mean score for each student in this questionnaire
Method 1: (To exclude the missing values)
1. Select [Transform] then [Compute Variable…] to open the dialogue box.
2. Type [Mean] in [Target Variable] box. Select [( )] and move [Q1] to [Q14] into
[Numeric Expression] box then [OK] as follow.
Missing values not included. If you
want to find the mean use Method 2
Method 2: (To include missing values in the calculation of the means)
1. Select [Transform] then [Compute Variable…] to open the dialogue box.
2. Type [Mean] in the [Target Variable] then select[Statistical] and [Mean] in the [Function group]](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-10-320.jpg)
![11
3. Click [ ↑ ] and move to [Numeric Expression] box. Move [Q1] to [Q14] into the [Numeric
Expression] box then [OK].
The means are calculated for the missing values](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-11-320.jpg)
![12
How to count the the total number of SD, D, A, SA coded as 1,2,3,4 for each student
1. Select [Transform] then [Count Values within Cases…] to open the dialogue box.
2. Enter [No1] in the [Target Variable] box and [Frequency of score 1] in the [Target Label] box.
Move [Q1] to [Q14] into [Numeric Variables] box then click on [Define Values] to open the
sub-dialogue box.
3. Click [1] in the [Value] box then [Add] to move to [Values to count] then [Continue] then [OK].](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-12-320.jpg)
![13
4. [Transform] then [Count Values within Cases..] type [No2] and [Frequency for score 2] and
move [Q1] to [Q4] as below. [Define Values..] to open sub-dialogue box.
Type [2] in [Value] box then [Add]and [Continue], [OK].](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-13-320.jpg)
![14
5. Repeat for [No3] for [Frequency of score 3] and [No4] for [Frequency of score 4].
Go to [Variable view ] change decimal place =0,](https://image.slidesharecdn.com/compute-and-recode-part-2-121012211833-phpapp01/85/Compute-and-recode-part-2-14-320.jpg)
Compute and-recode-part-2
- 1. 1 Compute and Recode for SPSS Ver 20 (DR SEE KIN HAI) (PART 2) A science teacher wanted to gauge the attitude of students towards science in rural areas of Brunei. He wanted to know whether there is a significant difference in their attitude towards science by level of education (i.e. Year 7, 8, 9, 10 or 11 or equivalent of Form 1,2,3,4 or 5), gender (male=1 or female=2) and ethnic group (Malay=1, Chinese=2, Kadazan / Dusun = 3, Murut=4, Others=5). For this purpose , he prepared a questionnaire that consisted of 2 parts: Part A: Respondents’ demographic background, Part B: Attitude towards science in school assessment questionnaire modified from Germann (1984). (Likert scale: SD=1, D=2, A=3, SA=4 reverse for negative items, Missing value = 999) (The following sample showed the response from a student)
- 2. 2 You should enter into your computer as: Id Form Gender Race Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 1 1 1 1 1 2 4 1 2 4 4 3 2 2 4 3 4 999 Similarly enter the data into your computer as follow and saved them in your data file disk.
- 3. 3 1. Setup your [Variable View] as follow: Missing value 1=Malay, 2=Chinese, 3=Kadazan/Dusun SD=1, D=2, A=3, SA=4 4= Murut, 5=Others 2. Now you enter the data as below.
- 4. 4 3. Now, the items for the questionnaire, Q2, Q7, Q10 and Q14 are negative items so the Likert scale should be reversed. SD =4, D= 3, A=2 and SA = 1. 4. Now you [Recode] the negatively-worded questions into the [same variables]. If you want can be into [different variables]. 5. Select [Transform] in the menu bar and click [Recode into Same Variables] to open the dialogue box. 6. Move [Q2, Q7, Q10 , Q14] into the [Variables] box then click [Old and New values] to open the sub-dialogue box. 7. Enter [1] in the [Old Value] box and [4] in the [New Value] box then [Add]. Repeat for 2 → 3, 3 → 2 and 4 → 1.
- 5. 5 7. Click on [Continue] then [OK]. Now you examine the [Data View] below the scores have been reversed. COMPUTE DATA Now to score students’ attitude towards science, you have to add up the scores for the 14 questions. There are 2 ways of doing this. How to total the score for each student in this questionnaire Method 1: (If you do not want to include the missing items, e.g. Q14) 1. Select [Transform] then [Compute Variable..] to open the dialogue box.
- 6. 6 2. Type [Total] into [Target Variable] box. Move [Q1] then [+] and repeat until [Q14] then [OK]. 3. Now click on [Data View], [Total] is created.
- 7. 7 Total is added to the [Variable View] Total value missing because of 999. To avoid this use Method 2 Method 2: ( Use the [Function group] if you want to include the missing values, e.g. Q14) 1. Select [Transform] then [Compute Variable..] to open the dialogue box.
- 8. 8 2. Enter [Total] in the [Targer Variable] box. In the [Function group] box select [Statistical] and [Sum] in the [Functions and Special Variables] box. 3. Click on [ ↑ ] to bring this function into [Numeric Expression] box.
- 9. 9 4. Move [Q1] to [Numeric Expression] box. Repeat until [Q14] then [OK]. 5. Now you examine the [Data View] below. The Total added for the missing values
- 10. 10 How to obtain mean score for each student in this questionnaire Method 1: (To exclude the missing values) 1. Select [Transform] then [Compute Variable…] to open the dialogue box. 2. Type [Mean] in [Target Variable] box. Select [( )] and move [Q1] to [Q14] into [Numeric Expression] box then [OK] as follow. Missing values not included. If you want to find the mean use Method 2 Method 2: (To include missing values in the calculation of the means) 1. Select [Transform] then [Compute Variable…] to open the dialogue box. 2. Type [Mean] in the [Target Variable] then select[Statistical] and [Mean] in the [Function group]
- 11. 11 3. Click [ ↑ ] and move to [Numeric Expression] box. Move [Q1] to [Q14] into the [Numeric Expression] box then [OK]. The means are calculated for the missing values
- 12. 12 How to count the the total number of SD, D, A, SA coded as 1,2,3,4 for each student 1. Select [Transform] then [Count Values within Cases…] to open the dialogue box. 2. Enter [No1] in the [Target Variable] box and [Frequency of score 1] in the [Target Label] box. Move [Q1] to [Q14] into [Numeric Variables] box then click on [Define Values] to open the sub-dialogue box. 3. Click [1] in the [Value] box then [Add] to move to [Values to count] then [Continue] then [OK].
- 13. 13 4. [Transform] then [Count Values within Cases..] type [No2] and [Frequency for score 2] and move [Q1] to [Q4] as below. [Define Values..] to open sub-dialogue box. Type [2] in [Value] box then [Add]and [Continue], [OK].
- 14. 14 5. Repeat for [No3] for [Frequency of score 3] and [No4] for [Frequency of score 4]. Go to [Variable view ] change decimal place =0,
- 15. 15 COURSEWORK The following data were obtained from the Attitude Towards Mathematics in Upper Secondary Questionnaire. 1. Recode the negatively-worded items, Q2, Q7, Q10, Q14 into the same Variables by reversing the Likert scales. (i.e. 4 → 1, 3 → 2, 2 → 3 and 1 → 4) 2. Compute the total scores of each student’s attitude from Q1 to Q14 (Use 2 methods) and also the total scores for all 30 students. 3. Compute the mean for each student (Use 2 methods) and the overall means. 4. Count the number of SD=1, D=2, A=3, SA=4 for each student and the overall count for the 30 students. 5. Determine if your instrument is reliable. (Find Cronbach’s alpha and split-half reliability coefficients. See L15). Id Year Gender Race Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 1 1 1 1 1 3 4 1 2 4 1 3 2 3 4 3 4 1 2 1 1 1 2 2 2 2 1 3 2 2 2 4 3 1 3 2 3 4 2 2 3 4 3 1 3 2 3 1 3 3 2 2 2 3 4 2 2 4 3 4 3 4 1 1 3 2 2 2 1 3 1 4 5 3 999 3 2 3 2 2 3 2 3 3 2 1 2 4 2 3 6 3 1 3 3 1 3 4 2 3 2 4 2 2 3 3 3 2 7 4 2 4 1 2 4 2 1 2 1 3 1 3 4 3 4 1 8 4 2 4 4 3 2 3 1 3 3 2 2 4 3 4 4 2 9 5 1 5 2 4 1 1 2 1 2 999 4 3 2 3 4 3 10 5 1 5 3 1 2 2 3 2 3 1 3 2 1 2 2 3 11 1 1 1 1 3 4 1 2 4 1 3 2 999 4 3 4 2 12 1 1 1 2 2 2 2 1 3 2 2 2 4 3 1 3 2 13 999 2 2 3 4 3 1 3 2 3 1 3 3 2 2 2 3 14 2 2 4 3 4 3 4 1 1 3 2 2 2 1 3 1 4 15 3 999 3 2 3 2 2 3 2 3 3 2 1 2 4 2 3 16 3 1 3 3 1 3 4 2 3 2 4 2 2 3 3 3 2 17 4 2 4 1 2 4 2 1 2 1 3 1 3 4 3 4 1 18 4 2 4 4 3 2 3 1 3 3 2 2 4 3 4 4 2 19 5 1 5 2 4 1 1 2 1 2 1 4 3 2 3 4 999 20 5 1 5 3 1 2 2 3 2 3 1 3 2 1 2 2 3 21 1 1 1 1 3 4 1 2 4 1 3 2 3 4 3 4 999 22 1 1 1 2 2 2 2 1 3 2 2 2 4 3 1 3 2 23 999 2 2 3 4 3 1 3 2 3 1 3 3 2 2 2 3 24 2 2 4 3 4 3 4 1 1 3 2 2 2 1 3 1 4 25 3 999 3 2 3 2 2 3 2 3 3 2 1 2 4 2 3 26 3 1 3 3 1 3 4 2 3 2 4 2 2 3 3 3 2 27 4 2 4 1 2 4 2 1 2 1 3 1 3 4 3 4 1 28 4 2 4 4 3 2 3 1 3 3 2 2 4 3 4 4 2 29 5 1 5 2 4 1 1 2 1 2 1 4 3 2 3 4 999 30 5 1 5 3 1 2 2 3 2 3 1 3 2 1 2 2 3