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EFFECTS OF DIFFERENTIAL REMOVAL FROM GROUP ON SOCIAL DEVELOPMENT OF RHESUS MONKEYS *
Author(s) -
Suomi Stephen J.,
Harrow Harry F.
Publication year - 1975
Publication title -
journal of child psychology and psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.652
H-Index - 211
eISSN - 1469-7610
pISSN - 0021-9630
DOI - 10.1111/j.1469-7610.1975.tb01264.x
Subject(s) - psychology , separation (statistics) , group (periodic table) , maternal deprivation , developmental psychology , period (music) , differential effects , physiology , biology , endocrinology , chemistry , physics , organic chemistry , machine learning , computer science , acoustics
SUMMARY Rhesus monkey infants were reared with surrogates in groups of four for the first 4 months of life, then were individually removed from their group for 28 days during the succeeding 6‐month period. Members of two groups were placed in vertical chambers during their period of group separation, while members of a third group were housed in single cages during their time of separation. A control group of four monkeys remained intact throughout the study. Results indicated that following removal from group, subjects showed lower levels of locomotion and play and higher levels of clinging and self‐clasping than nonseparated controls. Differences from controls were exaggerated in the monkeys confined in vertical chambers during separation. All separation groups were socially inferior to the control group by the end of the study. Implications of these findings are discussed.