Rate of addition as a function of difficulty and age

The relation between the difficulty and the differential validity of a test

1936 • 78 citations

The difficulty of a test and its factor composition

1941 • 72 citations

Ability, motivation, and speed

1937 • 71 citations

The relation of writing speed to age and to the senile psychoses.

1951 • 49 citations

Individual Differences in Speed of Response in Mental Test Materials of Varying Degrees of Difficulty

1948 • 34 citations

Manual of mental and physical tests in two parts, Part II: Complex Processes, A book of directions compiled with special reference to the experimental study of school children in the laboratory or classroom (2nd ed., rev. and enl.).

1915 • 26 citations

Experimentelle Studien zur Individualpsychologie

1889 • 20 citations

The Concepts of Reliability and Homogeneity

1950 • 16 citations

The psychophysics of mental test difficulty

1937 • 9 citations

Time scores and factor analysis

1940 • 6 citations