Compute content validity ratio for test items.Purpose
In this assignment, you will compute and interpret the validity evidence. In Part 1, you will calculate the content validity ratios. In Part 2, you will compute a validity coefficient using Jamovi. In Part 3, you will conduct a correlation analysis in Jamovi to obtain the convergent and discriminant evidence of test validity.
Please submit your work on Blackboard.
You can either:
You are working as a talent management intern for the multi-state grocery chain. You are developing a 10-item customer orientation measure to select grocery store cashiers.
How to Complete
Part 1: Content Validity Ratio (20 points)
In Part 1, you will compute the content validity ratio to summarize the subject matter experts’ judgment on each test item on the customer orientation scale.
You have asked 14 SMEs (grocery store managers, experienced cashers) to rate each item if it is “essential,” “useful,” or “not necessary” for promptness as a cashier.
Part 2: Validity Coefficients (20 points)
There are step-by-step instructions as well as a video on “How to get validity coefficient in Jamovi” in the slide presentation.
In Part 2, you are examining the validity evidence based on the relationship to external variables. You decided to use a concurrent design. You asked 100 current cashiers to complete the new customer orientation scale and obtained their most recent job performance score from the personnel file.
Open Jamovi data file “PSY590_jobperformance_FA20.omv”.
|Label in Jamovi|
|customer||Employee’s score on the new customer orientation scale. A higher score indicates that a person is more customer-oriented.|
|jobperf||Employee’s most recent job performance score. The score was obtained from the employee’s supervisor rating. A higher rating indicates better performance on the job.|
|team||Employee’s score on the team-orientation scale. A higher score indicates that a person is more team-oriented.|
|service||Employee’s score on the service competency scale. A higher score indicates that a person is more competent in providing customer services.|
Run a correlation analysis and answer Questions 4 through 9.
Part 3: Discriminant and Convergent Validity (20 points)
In Part 3, you will continue examining the validity evidence based on the relationship to external variables. In addition to the customer orientation scale, you asked the 100 cashiers to complete two additional scales: Team-orientation scale and service competency scale.
Both customer orientation and team-orientation scales are used for selecting cashiers. While both are deemed critical for cashiers to perform their job successfully, these two scales measure different characteristics.
The service competency scale is a commercially available selection measure for customer service jobs. This scale measures the job applicants’ characteristics that are similar to the new customer orientation scale.
Please use the same data file from Part 2 (Jamovi data file “PSY590_jobperformance_FA20.omv”).
Run a correlation analysis and answer Questions 7 and 8.
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