PSY 450 Lecture Notes - Lecture 2: Discriminant Validity, Concurrent Validity, Convergent Validity
Document Summary
A set of statements about mechanisms underlying a particular behavior. Organizes and unifies observations of the behavior and its relationships with other variables. An operational definition is not the same as the construct itself can leave out important components of a construct can include extra components that are not part of the construct being measured. Determined with scatter plots and correlations correlations closer to + 1. 00. Positive relationship: the two measurements change together in the same direction. Negative relationship: the two measures change in opposite directions correlations closer to -1. 00. Measurement procedure must accurately capture the variable that it is supposed to measure. Face validity: whether a measure superficially appears to measure what it claims to measure. How well scores from a new measure compare to scores from a more established measure of the same variable. Important when developing new scales, measures, procedures, etc. How well a procedure measures the underlying construct of interest.
