PSYC 2001 Lecture Notes - Lecture 10: Face Validity, Content Validity, Discriminant

• School: Carleton University
• Department: Psychology
• Course: PSYC 2001
• Professor: Erinn Squires

Document Summary

Conceptual variable to operationalization: self-reports, physiological, observational. Impossible to determine any quantitative values or differences across categories. Ordinal scale: rank ordering with numeric value, has magnitude, values are smaller or larger than the next. Interval scale: has magnitude, values are smaller or larger than the next, no true zero point. Ratio scale: has magnitude, values smaller or larger than the next, has a true zero point (an absence of something) Interval between items is known and is meaningful. Test-retest: consistent score every time the measure is used. Inter-rater: consistent scores no matter who does the measuring. Internal: assessed how well a certain set of items relate to each other: split-half reliability (cid:190) (cid:190) (cid:190) (cid:190) (cid:190) (cid:190) (cid:190) (cid:190) (cid:190) (cid:190) Subjective (you look and see the validity: face validity, content validity. The validity is not the same as reliability. A measure can be less valid than it is reliable but it cannot be more valid than reliable.