L. Kroeker

Pretesting as a confounding variable in evaluating an encounter group.

L. Kroeker, 1974 .

Indices of Pathology in Acquisition Responses by Mental Patients on a Fixed-Ratio Schedule

E. Oetting, C. W. Cole, L. Kroeker, 1970, Perceptual and motor skills.

Inadequacies of the Acquisition Responses of Mental Patients on an FI Schedule

E. Oetting, L. Kroeker, 1969, Perceptual and motor skills.