PSYB32H3 Lecture Notes - Lecture 4: Single-Photon Emission Computed Tomography, Positron Emission Tomography, Qualitative Property
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Slide 2 reliability and validity in assessment. Reliability: consistency of measurement, test-retest reliability. Dynamic; depends on situation of test; i. e. iq is a stable measure that has good test-retest reliability. If you get the same results, test is reliable: alternate form reliability. Give a different version of the test to avoid practice effects (when the subject remembers answers of test from the first time) Make sure all items on the test are measuring the same thing. Test has to measure what we say it measurse: construct validity. Example: if we demonstrate difference between groups (anxiety, non-anxiety), through test scores (for ex. ) then we know that we are measuring a construct (that we can"t touch) Psychological disorders are constructs; not tangible things. ; negative and positive impression management; person has no insight: characteristics of clinical interviews. What questions do you feel would be important to ask: structured/semi-structured interviews, behavioural observations. Typically checkings of symptoms that a patient may have.
