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In classroom, we covered reliability and validity. Cases listed below relate to

by | Nov 22, 2022 | Social Work

 

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In classroom, we covered reliability and validity. Cases listed below relate to Cronbach’s Alpha level and Criterion-related Validity. I have 3 case examples of reliability and validity test results. Please try to answer the questions regarding each case by using your knowledge learned in the classroom. You can always review the PPT slides that I used in the classroom.
Case #1:
When you establish the validity of a new scale by administering it to a sample of individuals comparing your new scale to an old scale already validated and computing a correlation.
Q#1: Which validity test did the researcher use?
Q#2: In the example, the correlation coefficient (Alpha Level) was .44. What does this value tell you about validity of the measurement? What if it was .84?
Case #2:
Suppose you developed a new scale to measure satisfaction with work. After you administer it to 100 people, you divide the sample into a.) those who answered happy and will stay at the agency, b.) those who answered neither happy or unhappy, and c.) those who answered unhappy and will probably leave.
You check with the personnel office 10 months later and find…
75% of those happy at work are still at work
50% of those neither happy nor unhappy were still at work
85% of those unhappy at work had taken other jobs.
Q#1: Which validity test did the researcher use? Why?
Case #3:
Anita is developing an instrument to measure caregiver burden among the spouses or partners of those who are living with individuals diagnosed with Alzheimer’s. Anita found that the caregiver burden is higher in the group with Alzheimer’s in the home than among parents of college students or among parents incarcerated for not paying child support or parents sending a child to boarding school.
Q#1: Which validity test did the researcher use? Why?

 

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