Intro to Psych: Reliability & Validity

Question 1

Reliability

Answer 1

= the extent to which an experiment, test or measuring procedure yields the same results on repeated trials ie. the degree of stability exhibited when a measurement is repeated under identical conditions

Question 2

Validity

Answer 2

= the degree to which a research study has produced results that accurately measure the behaviour or event that it claims to have measured

• internal validity: extent that undesirable variables have been excluded from influencing the outcome
• external validity: extent that the measure extrapolates/generalises to situations outside the test settings
• face validity: the extent that a test appears to measure what it claims to measure
• predictive validity: extent to which test scores predict later performance/behaviour