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Using a paired-associate learning task to assess parent-child phenotypic similarity
Christina Almstrom1, Mike Knight
1Department of Psychology, University of Central Oklahoma, Edmond 73034-5209, USA.
Psychological Reports
|November 11, 2005
Summary
Children seem to resemble fathers more due to genetic relatedness and faster learning of male facial features. This study used a paired-associate learning paradigm to investigate parent-child phenotypic similarity.
Area of Science:
- Psychology
- Genetics
- Human Behavior
Background:
- Paternity uncertainty has led to hypotheses of greater child resemblance to fathers.
- Previous evidence is mixed, potentially due to insensitive similarity measures and non-random comparisons.
Purpose of the Study:
- To investigate parent-child phenotypic similarity using a novel paired-associate learning paradigm.
- To determine the influence of genetic relatedness and sex on perceived facial resemblance.
Main Methods:
- Utilized 15 stimulus sets of photographs featuring two adults and one child.
- Employed a 2x2 between-subjects analysis of variance to analyze total errors across learning trials.
Main Results:
- Genetic relatedness to both mothers and fathers significantly influences perceived resemblance.
- Facial features of males were associated with children more quickly than female features.
- A significant sex difference in feature association was observed, which was unexpected.
Conclusions:
- Genetic relatedness impacts perceived facial similarity.
- The faster association of male facial features suggests a potential explanation for why children appear to resemble fathers more.
- The combination of genetic relatedness and maleness may explain the observed paternal resemblance bias.