PSYB04H3 Lecture 4: Understanding Measurement
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Scales of measurement: categorical/nominal: based on categories, ordinal: based on rank ordering. Interval: equal intervals, no meaningful zero (this means that a 0 does not indicate. "nothing" and it is a part of the continuum; for example, when the temperature is 0 degree. Lets the researcher estimate the overall reliability: three indicators of reliability: Interrater reliability: consistency across multiple observers (sometimes called interrater consistency): test-retest reliability: consistency across multiple time points (sometimes called test-retest consistency). Internal reliability: consistency across multiple items (sometimes called internal consistency): assessing reliability, reliability coefficients vary between 0-1. 0. Strong reliability: >. 90: acceptable reliability: >. 70, questionable reliability:
