Validity and Reliability in Measurement

These flashcards cover key concepts related to validity and reliability in measurement as discussed in the lecture.

Validity

The degree to which a measurement procedure measures or predicts what it is intended to.

Criterion Validity

The validity determined by correlating scores of a measurement procedure with another, more direct index of the characteristic being measured.

Face Validity

A type of validity where a measurement procedure appears to assess the variable it is intended to measure.

Reliability

The consistency of a measurement procedure, where repeated measurements yield nearly the same results.

Bias in Measurement

The tendency for a measurement procedure to produce false conclusions, often due to lack of validity.

Operational Definition

A clear definition of the characteristic to be measured or predicted, which guides the assessment of validity.

Example of Invalid Measure

Measuring personality by thumb length is highly reliable but not valid, as it is unrelated to personality.

Analogy of Archers

A metaphor used to illustrate reliability (consistency) and validity (accuracy) of measurement.

Archer Target A

Reflects unreliable measure, with shots scattered randomly around the target.

Archer Target B

Reflects high reliability but low validity, as shots are clustered far from the bull's-eye.

Archer Target C

Reflects both high reliability and high validity, with shots all in the bull's-eye.