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Origins of Individual Differences & Fitness

Alisha Janowsky

Created on October 3, 2025

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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International by Alisha Janowsky

Origins of Individual Differences & Fitness

Individual Differences

Fitness

If personality traits affect reproductive success (fitness), why hasn't natural selection eliminated "bad" traits? Here are Buss's explanations:

If everyone has the same evolved mechanisms, why aren't we all identical? Here are Buss's explanations:

Different environments favor different traits

Frequency-Dependent Selection:

Different Adaptive Strategies

Traits have context-dependent fitness effects

Environment Calibration

Sexual selection complicates things

Trade Offs