1. Cue-learning and problem-learning strategies in normal and retarded children;Achenbach;Child Development,1968
2. Effects of institutionalization on retarded children: a longitudinal, cross-institutional investigation;Balla;American Journal of Mental Deficiency,1974
3. Social learning theory;Bandura,1977
4. Effects of institutionalization on the self-concept and outerdirectedness of adolescents with mental retardation;Bybee;Exceptionality,1990
5. Is outerdirectedness employed in a harmful or beneficial manner by students with and without mental retardation?;Bybee;American Journal on Mental Retardation,1992