Lab Assignment 5 - Understanding Reliability and Validity(2)

A. PRELIMINARY NOTES 1. All terms used and/or requested in this assignment are specific to Quantitative Methods terminology. For example, terms such as "Variable," "Measurement," "Behavior," "Beliefs," "Attitudes," "Validity," "Reliability," etc., are to be understood in the sense of their meaning in this Quantitative Methods course. 2. This lab assignment consists of ten questions. Each question is worth one point. The entire lab assignment is worth ten points. This lab assignment is worth one percent of the final grade. 3. For each question, your answers should not exceed 50 words. B. CHARACTERISTICS OF THE WORK FILE 1. Front style: Times new Roman 2. Front size: 12 points 3. Line Spacing : one-and-a-half line spacing (1.5) 4. Margins : Use 1-inch margins on every side of the page. C. SUBMISSION GUIDELINES 1. Go to the Home Page of your student portal. 2. See the Menu : Content–Quizzes–Announcements–…–Zoom- ... –Groups– Assignments-More 3. Click on “ Assignments ” in the menu. 4. See the work to be done in the PDF file (and video file if applicable). 5. Do your work and save it as a PDF file. 6. Name your file as follows: Lab assignment5-first name-student number. 6.1. Example : Lab assignment5-Michel-123456789 7. Come back to “Assignments” in the menu. 7.1. In the list of assignments, click on Lab Assignment 5. 7.2. Under " Submit Assignment ", click " Add a file " and follow the instructions to add your work file. 7.3. Once your file has been uploaded, click "Submit" to submit your work. 8. You can only submit one file. However, you can replace a submitted file if the submission deadline has not expired. CMN3102 Professor : Michel Sawadogo 1/5 Lab Assignment 5 Understanding Valididy and Reliability CMN3102 - Winter 2023 Professor : Michel Sawadogo

D. LAB WORK (Take home) 1. Define the concept of " Validity " in Quantitative Methods. (Max. 50 words) 2. Define the concept of " Reliability " in Quantitative Methods. (Max. 50 words) 3. What does test-retest reliability consist of? (Max. 50 words) 4. Define the concept of " scale " in Quantitative Methods. (Max. 50 words) CMN3102 Professor : Michel Sawadogo 2/5

8. Below are the results of Conbrach's Alpha reliability test. Answer the following question: Table 1 : Results of Conbrach's Alpha reliability test Cronba ch’s Alpha Number of items 0,69 4 Items Corrected item-total correlation Cronbach's Alpha if item Deleted Outgoing 0.47 0.85 Talkative 0.76 0.90 Sociable 0.58 0.60 Enjoying social situations 0.21 0.71 Question : What does the “Cronbach's Alpha if item Deleted Cronbach's Alpha if item Deleted” item mean? (Max. 50 words) 9. Consider Table 1 above, related to the results of Conbrach's Alpha reliability test. Then, answer the following question: Question : What is the impact on Cronbach's Alpha if the " Ongoing " item were removed? CMN3102 Professor : Michel Sawadogo 4/5

10. Consider Table 1 above, related to the results of Conbrach's Alpha reliability test. Then, answer the following question: Question : If you had to remove only one item, which one would you remove ? CMN3102 Professor : Michel Sawadogo 5/5