Psychosocial Personality Measures and their Relation to the Social Brain Hypothesis: a DTI and VBM Study Open Access

Lapierre, Stephen Andrew (2010)

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Why do humans have larger brains than their non-human primate cousins? One of the most widely accepted explanations for this perceived difference in cranial capacity between humans and other primates is the Social Brain Hypothesis. This theory posits that as the number of individuals in social groups and the complexity of interactions between these individuals increases, the brain must expand to meet the processing requirements necessary for maintaining these social relationships. Using diffusion tensor imaging (DTI) and voxel-based morphometry (VBM), this study will test the theoretical plausibility of the Social Brain Hypothesis by measuring differences in gray matter volume and white matter tract integrity throughout the brain.

Table of Contents

Introduction 7
Methods 14
Results 23
Discussion 40
Works Cited 62

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