The study tested the effectiveness of Project LIFE, a programed language system, on a population of mentally retarded and/or learning disabled deaf children at Indiana State School for the Deaf. The perceptual training sequences and the thinking activities sequences of Project LIFE were implemented and evaluated. Pretest and posttest comparisons of two groups (five Ss each) of 6 to 10 year old students on the perceptual training sequence indicated significant gains in the program objectives. Pretest and posttest comparisons of a group of 9 to 11 year old students on the thinking activities sequence also showed high levels of improvement. (Author)