Magnitude and moderators of bias in observer ratings: A meta-analysis.

A Coefficient of Agreement for Nominal Scales

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Intraclass correlations: Uses in assessing rater reliability.

Patrick E. Shrout, Joseph L. Fleiss · Psychological Bulletin · 1979 · 23K citations

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Convergent and discriminant validation by the multitrait-multimethod matrix.

Donald T. Campbell, Donald W. Fiske · Psychological Bulletin · 1959 · 17.1K citations · Full text

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Statistical Methods for Meta-Analysis

Stanley Wasserman, Larry V. Hedges, Ingram Olkin · Journal of Educational Statistics · 1988 · 10.5K citations

Public Health, Biostatistics, Epidemiologic Methods +14

The file drawer problem and tolerance for null results.

Robert Rosenthal · Psychological Bulletin · 1979 · 8.6K citations

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