Rigidity and social reinforcement effects in the performance of institutionalized and noninstitutionalized normal and retarded children


  • This research was supported by Research Grant MH-0680901 from die National Institute of Mental Health, United States Public Health Service The author would like to thank Genevieve Goff for running Ss and for her advice during all phases of this study He would also like to thank Harold Stevenson for his critical reading of an earlier draft of this paper