C. G. Clark

Skin conductance response conditioning with CS intensities equal to and greater than UCS intensity

W. F. Prokasy, W. C. Williams, C. G. Clark, 1975, Memory & cognition.

A classically conditionable skeletal response can be acquired with a discriminated punishment contingency

W. F. Prokasy, W. C. Williams, C. G. Clark, 1974 .

Manipulation of response-contingent unconditioned-stimulus intensity in human eyelid conditioning: A two-phase model analysis

W. F. Prokasy, C. G. Clark, 1976, Memory & cognition.

Conditioned response-contingent delays of the unconditioned stimulus in human aversive conditioning.

W. F. Prokasy, W. C. Williams, C. G. Clark, 1975, Journal of experimental psychology. Human learning and memory.