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Hopkins, W.D.; Parr, L.A. |
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Title |
Lateralized behavior and lymphocyte counts in chimpanzees (pan troglodytes): A cross-sectional and longitudinal assessment |
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1998 |
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Developmental Neuropsychology |
Abbreviated Journal |
Developmental Neuropsychology |
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14 |
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4 |
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519-533 |
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Abstract |
Cross?sectional and longitudinal assessment of lymphocyte count and behavioral laterality was examined in a sample of captive chimpanzees (Pan troglodytes) to assess the validity of the Geschwind?Behan?Galaburda (GBG) theory of cerebral lateralization. For the cross?sectional analysis, chimpanzees classified as right?handed for feeding exhibited lower lymphocyte counts than chimpanzees classified as either ambiguously handed or left?handed. Longitudinal analysis indicated that some measures of laterality within the first 3 months of life predicted (a) direction of hand preference at 2 to 5 years of age and (b) lymphocyte counts for the first 3 years of life. The association between lymphocyte count and behavioral laterality was more evident in males than females. Taken together, the results support some aspects of the GBG theory. |
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8756-5641 |
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doi: 10.1080/87565649809540726 |
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Equine Behaviour @ team @ |
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5780 |
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Author |
Schultheiss, O.C.; Riebel, K.; Jones, N.M. |
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Title |
Activity inhibition: A predictor of lateralized brain function during stress? |
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Journal Article |
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Year |
2009 |
Publication |
Neuropsychology |
Abbreviated Journal |
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23 |
Issue |
3 |
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392-404 |
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activity inhibition; laterality; stress; content analysis; self-regulation; mood states; affective stimuli; perceptual laterality; motor laterality |
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The authors tested the hypothesis that activity inhibition (AI), a measure of the frequency of the word “not” in written material, marks a propensity to engage functions of the right hemisphere (RH) and disengage functions of the left hemisphere (LH), particularly during stress. Study 1 and Study 2 showed that high AI predicts faster detection of stimuli presented to the RH, relative to the LH. Study 2 provided evidence that the AI-laterality effect is specific to perceptual, but not motor, laterality and that it is particularly strong in individuals with low mood, but absent in individuals in a positive mood state. Study 3 showed that negative affective stimuli prime the AI-laterality effect more strongly than positive affective stimuli. Findings from Study 4 suggest that situationally induced frustration (losing a contest), in conjunction with high AI, leads to increased attentional laterality. The present findings substantially bolster the construct validity of AI and contribute to a better understanding of earlier findings linking AI to physiological stress responses, immune system functioning, alcohol abuse, and nonverbal behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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Schultheiss, Oliver C.: Institute of Psychology, Friedrich-Alexander University, Kochstrasse 4, Erlangen, Germany, 91054, oliver.schultheiss@psy.phil.uni-erlangen.de |
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US: American Psychological Association |
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1931-1559 (Electronic); 0894-4105 (Print) |
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Equine Behaviour @ team @ 2009-05986-011 |
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5382 |
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