Psychometric Methods (PSY3307D)

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The data library for the data provided in the file Assignment 2 – Raw Data is presented hereunder. For this assignment, you will need to conduct several analyses and report the appropriate results, as demonstrated and practiced in the last two classes using SPSS.

Variable

Name

 Variable

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Type

 Valid Responses Correct

Responses(s)

 Notes
Item1 MC A, B, C, D C  
Item2 MC A, B, C, D A  
Item3 MC A, B, C, D A  
Item4 MC A, B, C, D B, C There are 2 correct responses
Item5 T / F True, False True  
Item6 Essay 0 – 10 n/a Scored out of 10
GS Combo 0 – 100 n/a Gold Standard Test Score

Score the test (6 items – Q1 through Q6) and compute the Test score (out of 15). Provide answers to the following questions (marks indicated in brackets):

  1. a)Determine the correlation between the Test score and the Gold Standard score. What do you conclude about the validity of the new Test? (5 marks)
  2. b)Examine the correlations between the 6 items and the Test score. Identify any items that could be eliminated. Explain your reasoning. (5 marks)
  3. c)Compute the reliability (Cronbach’s alpha) for the first five items (the MC and T/F items). What do you conclude about the reliability of the new test? (5 marks)
  4. d)If you eliminated the items identified above in Question d), what would the new Cronbach’s alpha for the remaining items be? (5 marks)

You may work in small groups on this assignment,

but each person MUST provide an independent

submission written in their own words.

 
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