Psychological Testing and Assessment: An Introduction To Tests and Measurement, 5/e

Ronald Jay Cohen
Mark Swerdlik

Reliability

Chapter Outline

The Concept of Reliability

Sources of Error Variance

Test construction

Test administration

Test scoring and interpretation

Other sources of error

Reliability Estimates

Test-Retest Reliability Estimates

Parallel-Forms and Alternate-Forms Reliability Estimates

Split-Half Reliability Estimates

The Spearman-Brown formula

Other Methods of Estimating Internal Consistency

The Kuder-Richardson formulas

Coefficient alpha

Measures of Inter-Scorer Reliability

The kappa statistic

Using and Interpreting a Coefficient of Reliability

The Purpose of the Reliability Coefficient

The Nature of the Test

Homogeneity versus heterogeneity of test items

Dynamic versus static characteristics

Restriction or inflation of range

Speed versus power tests

Criterion-referenced tests

Alternatives to the True Score Model

Reliability and Individual Scores

The Standard Error of Measurement

The Standard Error of the Difference Between Two Scores

CLOSE-UP

The Reliability of the Bayley Scales for Infant Development

EVERYDAY PSYCHOMETRICS

The Reliability Defense and the Breathalyzer Test

SELF-ASSESSMENT

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