PSYB01H3 Lecture Notes - Parametric Statistics, Chi-Squared Test, Nonparametric Statistics
Document Summary
Developing and defining constructs: define ur ideas into a clearly defined theory- which provides the conceptual framework for ur studies, meaning of terms and identifies how variable re to measured and the rationale. Important when considering statistical analyses: non-parametric statistics = test hyp for variables that use nominal and ordinal scales, eg chi square test, parametric statistics = generally used with variables that are measured on either interval and ratio scales. Measurement reliability: test-retest reliability= scores should remain consistent over time. Interobserver reliability= degree to which raters code the same observed behavior. Logic of measurement validity: circular reasoning use of independent measures of theoretically liked outcomes to validate the assessment protocol effectively avoids a common pitfall in research design, research design can be invalidated by circular reasoning. Content validity: valid test needs to provide full measure of a construct, content validity- refers to extent to which the test items have sufficient breadth to capture the full range of a construct.
