Nonrandom assignment and the analysis of covariance.

Statistical Theories of Mental Test Scores

1969 • 8,132 citations

The Advanced Theory of Statistics.

1978 • 6,960 citations

The Analysis of Variance

1960 • 5,685 citations

Experimental and quasi-experimental designs for research on teaching

1963 • 1,446 citations

Problems in Measuring Change

1965 • 1,388 citations

Analysis of Covariance: Its Nature and Uses

1957 • 482 citations

Errors of Measurement in Statistics

1968 • 473 citations

Are There Two Regressions?

1950 • 410 citations

Misuse of analysis of covariance when treatment effect and covariate are confounded.

1968 • 136 citations

Interpretation of Adjusted Treatment Means and Regressions in Analysis of Covariance

1957 • 89 citations

Control of spurious association and the reliability of the controlled variable.

1965 • 86 citations

The Use of Analysis of Covariance and Balancing in Analytical Surveys

1953 • 44 citations

Experimental Randomization: Who Needs It?

1975 • 41 citations

Note on Evans and Anastasio on the analysis of covariance.

1970 • 27 citations

The significance of treatment effects in ordered category data

1977 • 7 citations

Deleted Work

1955 • 0 citations