Sample heterogeneity

Question 1

Sample heterogeneity

Answer 1

The greater the variability of the psychological attribute among respondents, the larger the reliability. Meaning
the more heterogenous a variable, the larger the true score variance. Explaining more of the total variance

Question 2

Reliability generalization studies

Answer 2

Looks at previous studies and their reliability. Eg revealing that all test score acceptable reliability, but that they do vary across studies.

It enables you to identify and understand the ways in whcih sample characteristics effect the reliability of test scores

Question 3

Difference score

Answer 3

Subtracting initial score form the final score to see subjects’ difference
- Negative means skill decline
- positive improvement

Question 4

Types of difference scores

Answer 4

Intraindividual: Change score, two scores on same test

intraindividual; Disrepancy score, two measures from different tests

interindividual; giving two people same test, difference betw;.

Question 5

Difference score reliability

Answer 5

Differece scores are relatively reliabile when the two indvidual tests are relatively uncorrelated

DS will be relatively reliable when the two test produce scores that are themselves reliable

DS reliability will not be higher than the average reliability of the two tests

DS Reliability is much smaller than the reliability of two sets of individual test score