Chapter 3

Test Worthiness ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Correlation Coefficient ,[object Object],[object Object],[object Object],[object Object],[object Object]

Correlation Coefficient (Cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Correlation Coefficient (Cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Correlation (cont’d) ,[object Object],[object Object],[object Object],-1 0 +1 Direct Inverse Weak Strong Strong

Correlation Examples r = .35 r = -.67 SAT score Coll. GPA 930 3.0 750 2.9 1110 3.8 625 2.1 885 3.3 950 2.6 605 2.8 810 3.2 1045 3.0 910 3.5 Missed Classes Coll. GPA 3 3.0 5 2.9 2 3.8 8 2.1 1 3.3 6 2.6 3 2.8 1 3.2 3 3.0 0 3.5

Correlation Scatterplots ,[object Object],[object Object],[object Object],[object Object]

Scatterplots (cont’d) ,[object Object],[object Object]

More Scatterplots ,[object Object],[object Object]

Coefficient of Determination (Shared Variance) ,[object Object],[object Object],[object Object],[object Object],[object Object],Depression Anxiety Shared Trait Variance

Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Content Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Content Validity (cont’d) Survey of Domain Step 1: Survey the Domain Step 2: Content Matches Domain Step 3: Test items reflect content Step 4: Adjusted for relative importance Content Matches Domain Item 1 x 3 Item 2 x 2 Item 3 x 1 Item 4 x 2 Item 5 x 2.5

Content Validity (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Criterion-Related Validity: Concurrent and Predictive Validity ,[object Object],[object Object],[object Object],[object Object],[object Object]

Criterion-Related Validity: Concurrent Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Criterion-Related Validity: Predictive Validity ,[object Object],[object Object],[object Object],[object Object],[object Object]

Concepts Related to Predictive Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Construct Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Construct Validity (cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Construct Validity: Experimental Design ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Construct Validity: Factor Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Construct Validity: Convergent Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Construct Validity: Discriminant Validity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Validity Recap ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Reliability ,[object Object],[object Object],[object Object],[object Object]

Three Ways of Determining Reliability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Test-Retest Reliability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Time A A

Alternate, Parallel, or Equivalent Forms Reliability ,[object Object],[object Object],[object Object],[object Object],[object Object],A B

Internal Consistency Reliability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Split-half or Odd-even Reliability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Split-half or Odd-even Reliability Internal Consistency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A

Cronbach’s Alpha and Kuder-Richardson Internal Consistency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A

Item Response Theory: Another Way of Looking at Reliability ,[object Object],[object Object],[object Object]

Item Response Theory: Another Way of Looking at Reliability ,[object Object],[object Object],[object Object],[object Object],[object Object]

Cross-Cultural Fairness ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cross-Cultural Fairness ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cross-Cultural Fairness ,[object Object],[object Object],[object Object],[object Object],[object Object]

Cross-Cultural Fairness ,[object Object],[object Object]

Disparities in Ability ,[object Object],[object Object],[object Object],[object Object]

Practicality ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Selecting & Administering Tests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chapter 3

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Chapter 3