Empirical investigation of key business factors for digital game performance

The Measurement of Observer Agreement for Categorical Data

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Public Health, Biostatistics, Categorical Data Analysis +12

Coefficient Alpha and the Internal Structure of Tests

Lee J. Cronbach · Psychometrika · 1951 · 43.2K citations · Full text

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A Coefficient of Agreement for Nominal Scales

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Convergent and discriminant validation by the multitrait-multimethod matrix.

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Henry F. Kaiser · Educational and Psychological Measurement · 1960 · 12.2K citations

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