Feb 4 - Identifying Good Measurements Flashcards
what are 3 ways to measure variables?
- self reports
- observational and behavioural measures
- physiological measures
what is an example and why do we have self report as a measurement?
Self report’s are things like questionnaires.
They operationalize conceptual ideas. However people may not be completely honest
what is an example and why do we have observational and behavioural measures?
examples are things like tracking eye movements or how many times people smile
to opperationalize the variable by observing behaviours.
what is an example physiological measures?
taking someones blood pressure
what are ordinal variables?
variables that have an order, no equal distance or any distance between them, and have no true zero value
ex. birth order
what are interval variables?
variables that have order, equal amounts between each variable but not a true zero
example temperatures or days
what are ratio variables?
variables that are ordered, have equal distance and have a meaningful and a true zero.
reaction time, weight
what are the 3 measures of reliability?
test-retest, interrater, internal
what is test-retest reliability?
testing and re-testing without any intervention or treatment
ex. IQ test
what is interrater reliability?
consistent rating between multiple rater/coders/observers
ex. essay marking with 2 TA’s
what is internal reliability
consistency in a pattern of answers, no matter how a question.
ex. 2 different tests for depression
what is r (or ICC) = 0.7 or higher
interrater reliability for quantitative
k = 0.7 or higher
interrater reliability categorical
