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PSYB32H3 (1,174)
Chapter 4

Chapter 4 Notes

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University of Toronto Scarborough
Konstantine Zakzanis

CHAPTER 4 Reliability And Validity Reliability - Test-retest reliability: extent to which ppl being observed perform taking the same test twice, sometimes weeks apart. - Alternate-form Reliability: patients are tested twice but with 2 different types of tests, in case they aim for consistency and try to mimic the same answers as their previous test when given test-retest reliability. - Inter Consistency Reliability: Asses whether the items on a test relate to one another. A person with anxiety who says yes to dry mouth should also say yes to muscle tension. Validity Generally related to whether a measure fulfills its intended purpose. Ex: Does a questionnaire intended to measure hostility really do that? Note that validity is related to reliability: Unreliable measures will not have good validity. - Content Validity: Refers to whether the measure adequately samples the domain of interest. Ex: Axis I Diagnostic test has high content validity because it asks questions about all the symptoms involved in Axis I diagnosis. - Criterion Validity: Evaluated by determining whether a measure is associated in an expected way with some other measure (the criterion). Ex: In a test that measures depression, depressed people should score higher than non-depressed people. If these relationships are measured at the same time, it is known as Concurrent Validity. Also, you can have Predictive Validity which is the ability of a measure to predict some other variable that is measured in the future. Ex: IQ tests were made to predict future school performance. - Construct Validity: The effect to which scores on an assessment relate to some hypothesis or theory. A construct is an inferred attribute such as anxiousness. Ex: if people with an anxiety disorder and those without take an anxiety test, if the people with the disorder come up with a higher score, the test has construct validity. Also, when peoples self- reports on tests match up with observations of their clinicians, the construct validity increases. [I DONT REEEEAAAALY GET THIS] Psychological Assessment Psychological assessment techniques are designed to determine cognitive, emotional, personality and behavioural factors in psychopathological functioning. Clinical Interviews - Interviews are ways in which one person uses language as the means of finding out about another person. Characteristics of Clinical Interviews www.notesolution.com
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