M. Fehr

The effects of a say-then-do training sequence on children's social behavior.

Laurie R. Lehman, D. Wacker, Burke H. Bretzing, 1979 .

The measurement of motor, visual and auditory discrimination skills in mentally retarded children and adults and in young normal chilren.

D. Schallert, J. Flora, N. Kerr, 1977 .

Obtaining help from strangers: Effects of eye contact, visible struggling, and direct requests.

N. Kerr, D. Wacker, Alice Dybsky, 1979 .

Visual, auditory, and vibratory stimulation as reinforcers for profoundly retarded children.

D. Wacker, J. Trezise, R. Lennon, 1979 .