A time-sample method for measuring general activity and its components.

Relation of random activity to food deprivation.

1953 • 180 citations

A measurement of mother-child interaction.

1946 • 58 citations

Application of Systematic Direct Observational Methods to Analysis of the Radiation Syndrome in Monkeys

1956 • 22 citations

A time analysis of certain aspects of the behavior of small groups of caged mice.

1947 • 21 citations