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A biobehavioral developmental profile (BDP) for the pigtailed monkey
Author(s) -
Reite Martin,
Short Robert
Publication year - 1980
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.420130303
Subject(s) - heart rate , alpha (finance) , psychology , electroencephalography , developmental psychology , audiology , sleep patterns , demography , physiology , medicine , neuroscience , psychometrics , blood pressure , construct validity , sociology
Behavioral development during the 1st 5 months of life was observed in 21 group‐living mother‐reared pigtailed ( M. nernestrina ) monkey infants. Periodic behavioral observation sessions provided monthly mean scores for 28 different behavioral items. Infants appeared to be separable on several behavioral continua, including their general level of activity and the nature of the mother‐infant relationship. Individual differences were prominent, appeared early and persisted. Patterns of behavior were examined and found to be stable across time. Physiological data (heart rate, body temperature, sleep patterns EEG activity) were collected from 15 of the infants at a mean age of 23 weeks using totally implantable multichannel biotelemetry systems. Group mean values and measures of individual variability were obtained for 23 physiological variables. Physiological variables were correlated with each other and measures of concurrent behavior; the following relationships emerged: Animals with higher body temperatures, both day and night, also tended to have higher heart rates. EEG alpha frequency and alpha ratio (a measure of alpha organization) were positively correlated, meaning animals with higher‐frequency alpha activity tended to have better organized alpha, with less background slowing. Animals with higher alpha frequencies and alpha ratios had more cardiac arrhythmias. Animals with lower body temperatures had longer REM periods and had more Drowsy and less Stage 2 sleep periods, with more frequent awakenings. More active animals had higher body temperatures and heart rates both day and night; animals who rested more had lower body temperatures. Infants that spent more time away from the mother (not in physical contact) appeared to have more cardiac arrhythmias. Infants that were carried more or cradled more by the mother tended to have lower alpha ratios (more slow activity intermixed). More active infants tended to have more Stage 3 4 sleep, less REM sleep, and shorter REM periods than did less active infants.The behavioral data collected during the 1st 4 months of life in the subset of 15 infants were correlated with the subsequent physiological data, and several different types of correlational patterns emerged. Certain physiological variables were highly correlated with behavior during all months, others were highly correlated only with early behavior (e.g., Months 2 and 3) or with lnter behavior (e.g., Months 3 and 4).