CRCJ 3001 Chapter Notes - Chapter 3: Face Validity, Predictive Validity, Operational Definition

• School: Carleton University
• Department: Criminology and Criminal Justice
• Course: CRCJ 3001
• Professor: Susan Yamamoto

Document Summary

Using operational definitions: best method of determining how a variable should be measured = consult previous research involving same variable, critically examine any measurement procedure + ask yourself whether a diff. technique might produce better measurements. Reliability of measurement: reliability: stability/consistency of measurement. The nominal scale: nominal scale: scale of measurement in which categories rep. qualitative diff. in variable being measured. 3: categories have diff. names but not related to each other in any systematic way, ex. race, gender, occupation, academic major. Iq scores & rating scales) as if they were from an interval scale. Interval scale can determine direction & magnitude of a diff. Self-report measures: self-report measure: measurement obtained by asking a participant to describe his/her own attitude, opinion, or behaviour, advantage: most direct way to assess a construct, disadvantage: v easy for participants to distort self-report measures = undermines validity. Behavioural measures: behavioural measure: measurement obtained by direct observation of an individual"s behaviour, ex.