Genetic Contributions to Individual Differences in Memory Performance
Abstract
This paper discusses generally the potential effects of genetic markers on individual differences in cognitive performance. Research on the role of two genetic markers related to the immune system—complement factor C3 and haptoglobin—and one genetic marker—apolipoprotein E (ApoE)—and the interaction with environmental conditions of cognitive support at memory encoding and retrieval are discussed in particular. Data from an ongoing longitudinal study are used to illustrate that the two markers of the immune system are strongly associated with performance in episodic memory tasks, although there is no association to semantic memory. Cross-sectional data reveal a relatively weak association between apolipoprotein E and memory performance. Preliminary analyses of longitudinal data reveal a somewhat stronger association between this genetic marker and some aspects of episodic memory performance.
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