PSYA01H3 Chapter Notes - Chapter 2: Ecological Validity, Research I University, Scatter Plot
Document Summary
Based on measurements that are objective, valid, and reliable. Objective measurements: measure of an entity or behaviour that ,within an allowed margin of error, is consistent across instruments and observers. Variable: the object, concept, or event being measured. Operational definitions: statements that describe the procedures (or operations) and specific measures that are used to record observations (eg. depression could be operationally defined as a score of 21 or higher on the beck depression inventory ) Essential components of scientific research include: validity: the degree to which an instrument or procedure actually measures what it claims to measure, reliability: provides consistent and stable answers across multiple observations and points in time. Test-retest reliability: examines whether scores on a given measure of behaviour are consistent across test sessions. Alternate-forms reliability: examines whether different forms of the same test produce the same results. Inter-rating reliability: having more than one rater where the raters agree on the measurements that were taken.
