PSYC 332 Lecture Notes - Lecture 2: Shooting Of Amadou Diallo, Type I And Type Ii Errors, Construct Validity
9 Jul 2015
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*reliability: refers to how stable or consistent a measure is. **test-retest reliability: used to assess the consistency of a measure from one time to another. : this approach assumes that there is no substantial change in the construct being measured between the two occasions. The amount of time allowed between measures is critical. **split-half reliability: randomly divide all items that purport to measure the same construct into two sets. : we administer the entire instrument to a sample of people and calculate the total score for each randomly divided half. And measure the correlation between these two total scores. **inter-rater reliability: a measure of the variability between raters" scores. : when there is subjective assessment, consistent agreement btw judges is needed. : need to have defined criteria for evaluation. : calculate the percent of agreement between the raters. *validity: how true a study or measure is. How well a study/ measure does what it purports to do.
