12_quantitative-research-methodology.ppt
- 2. Contents Quantitative research Questionnaire survey – steps Questionnaire – advantages/disadvantages Type of questions Scaling responses Question placement
- 3. Quantitative Research Typically involves counting or measuring Often statistical tests are applied to detect or confirm trends Purpose is to get clear-cut, precise and accurate results, factually reflecting the situation under study Questionnaire is one of the popular tools for the quantitative research
- 4. Questionnaire Survey - Steps 1. Define the problem/ survey topic 2. Use previous studies & expert advice 3. Define research questions/ objectives 4. Define study population and sample size 5. Develop a preliminary questionnaire 6. Pretest the questionnaire (similar subjects) 7. Cover letter (Introducing the study, deadline for return, guarantees for data anonymity) 8. Stamped & self-addressed envelop 9. Follow-up letter for non-respondents
- 6. Questionnaire - Advantages Broad coverage (local, national, international) Frank and anonymous answers Economical for large population Less Time consuming Quantitative data (easy to analyze) Filling at a convenient time Easy to respond (fixed responses) Good for sensitive & ego-related Qs. Original hard-to-obtain data
- 7. Questionnaire - Disadvantages No clarification for ambiguous questions Inadequate motivation to respond Poorly worded or direct questions Unattractive style and format Low response rate Inaccurate responses – no verification Limited fixed responses Cannot uncover causes or relationships for attitudes, beliefs, actions
- 8. Type of Questions Factual: Age, gender, education, experience (often used to investigate relationship) Informative: What respondents know about a given topic (How do you come to know about the availability of e-journals?) Attitudinal/Opinion: To obtain info about respondents’ beliefs, feelings, values (Do to agree that current copyright law is fair?) Self-perception: Allows subjects to compare their ideas or actions with others (How active are you in the community work? How will you describe your computing skills?)
- 9. Type of Questions Standard of Action: How respondents will act in a situation (For which party you will vote in the next election? Will you join the organ donation society? ) Projective Questions: Allow respondents to answer in an indirect manner by imposing their feelings, attitudes or beliefs on others (Are most of the Singaporeans quitters or stayers? Are students happy with the grading scheme?)
- 10. Structured/Unstructured Qs Unstructured Questions: Allow respondents to reply freely without having to select one of several provided responses (also called open- ended questions) Useful for exploratory studies in which various dimensions and facets of a problem are examined Usually difficult to analyze responses What steps are required to improve the quality of National Service? Usually low response rate Another possible categorization of questions:
- 11. Structured Questions Dichotomous: yes/no, true/false, agree/disagree Multiple Choice: What sources do you use for writing term reports? (check all that apply) How many hours do you exercise per week (check only one response) How satisfied are you with the quality of canteen ‘A’ food? Contingency: Determine if the respondent is qualified to answer a subsequent question) Do you use databases available through iGems? (If no, please move to question 15) * Have you participated in DIS orientation? (Yes/No) If yes, how effective was this briefing? (Very effective, effective, ineffective …) Provide a group of fixed responses
- 12. Scaling Responses Likert-type Scale: Each response is assigned a numeric ranking based on a continuum that contains predetermined units of measurement Designed to show a differentiation among respondents opinions How important is …. (very important, important ….) How adequate are …. (v. adequate ……..inadequate) How frequently do you ... (frequently … infrequently)
- 13. Scaling Responses Semantic Differential Scale: Provides a set of bipolar adjective pairs Q. How would you rate performance of the Income Tax staff? 1 2 3 4 5 6 7 Bad … … … … … … … Good Unfair … … … … … … … Fair Harsh … … … … … … … Gentle
- 14. Scaling Responses Respondents are expected to rank responses according to their importance/ preference Should be used carefully as many respondents face difficulty in understanding/responding Only use a short list of responses Q. What sources do you prefer for writing term reports? Please rank them according to …… (1= most preferred; 7= least preferred) --- Books --- Encyclopaedia --- Friends --- Internet --- Journals --- Lecture notes --- Personal collection Rank-order or Comparative Ranking Scale
- 15. Question Placement Opening questions - start with easy non threatening questions Sequence - according to the research topic, logical flow Sensitive questions - should be asked only after trust is developed Difficult questions - more difficult questions should be asked at the end Personal Data – age, gender, qualification, experience
- 16. The End
- 17. Mapping Survey Questions Res. Objective 1 Question Question Question Res. Objective 2 Question Question Res. Objective 3 Question Question Question