Psychology 2310A/B Chapter Notes - Chapter 4: Criterion Validity, Psychological Evaluation, Internal Consistency

• School: Western University
• Department: Psychology
• Course: Psychology 2310A/B
• Professor: Albert N Katz

Document Summary

Systematic gathering and evaluation of information pertaining to an individual with suspected abnormal behaviour. A diagnosis is only as good as the assessment on which it is based, and the assessment in turn is only as good as the tools used to carry it out. Test-retest reliability the degree to which a test yields that same results when it is given more than once to the same person. Alternate-form reliability two forms of the same test, develop questions, word questions slightly different. Internal consistency refers to the degree of reliability within a test. Split-half reliability comparing responses on odd number test items with responses on even numbered test items. Coefficient alpha calculated by averaging the intercorrelations of all items on a given test. Higher coefficient alpha = higher internal consistency. Face validity user of test believes the ites on that test resemble the characteristics associated with the concept being tested.