PSYCO212 Lecture Notes - Lecture 15: Concurrent Validity, Convergent Validity, Measuring Instrument

• School: University of Alberta
• Department: Psychology
• Course: PSYCO212
• Professor: Poliana Barbosa

Document Summary

Conceptual definition: a researcher"s definition of a variable at an abstract level. Operational definition: the specific way in which a concept of interest is measured or manipulated as a variable in a study. Self-report measure: a method of measuring a variable in which people answer questions about themselves in a questionnaire or interview. Informant reports: a person who observes or knows the target well responds to a series of questions about the target. Observational measure: a variable measured by recording observable behaviours or physical traces of behaviours. Physiological measures: a variable measured by recording biological data. A quantitative variable is a variable whose values can be recorded as meaningful numbers. Ordinal scale: a quantitative measurement scale whose levels represent a ranked order, in which it is unclear whether the distances between levels are equivalent. Interval scale: a quantitative measurement scale that has no true zero and in which the numerals represent equal intervals (distances) between levels.