Extra-task performance as a measure of learning a primary task.

The Principles of Psychology

1890 • 14,029 citations

Principles of Behavior

1944 • 4,124 citations

Mathematics, measurement, and psychophysics.

1951 • 882 citations

The Psychology of Human Learning

1953 • 809 citations

Conditioning and learning

2014 • 702 citations

Effect of incentives upon reactions to peripheral stimuli.

1952 • 120 citations