A series of three experiments was conducted with three severely retarded children to investigate the vocalization-producing potential of two antecedent conditions: adult talk (commonly cited antecedent) and adult silence. (Author/CL)

Results indicated no significant differences between conditioning procedures in regard to obtained MRLs (minimum response levels) number of stimulus presentations required to establish MRL (discounting conditioning trials), and number of false-positive responses observed during control trial for 60 premature infants at one or two years of age.…

Response and reinforcement features of operant discrimination paradigms used in audiometric assessment were investigated with normal 17-month-old children. Findings indicated more responses prior to onset of habituation when response tasks involved complex central processing skills and a twofold increase in number of subject responses when…

A training program in which operant procedures were used to improve the identification and definition of selected vocabulary words by a 6-year-old mildly retarded Down's syndrome girl is described. Results showed that the S had generalized the training and the findings were replicated with two additional children. (PHR)