Dopaminergic and neurotrophic genetic polymorphisms modulate the implicit gender-science stereotype

Area of Science:

• Neurogenetics
• Social Psychology
• Adolescent Development

Background:

• The gender-science stereotype, linking women with humanities and men with sciences, persists despite societal changes.
• Implicit social cognition, including unconscious biases like the gender-science stereotype, is increasingly studied for its societal impact.
• Genetic factors influencing neurobiology are potential contributors to individual differences in implicit biases.

Purpose of the Study:

• To investigate the association between specific genetic variations (SNPs) in dopaminergic and neurotrophic systems and the implicit gender-science stereotype.
• To determine if COMT and BDNF gene polymorphisms explain variance in adolescents' implicit gender-science associations.
• To validate findings through a longitudinal replication study.

Main Methods:

• Genotyping of single nucleotide polymorphisms (SNPs) in COMT and BDNF genes in 413 adolescents.
• Assessment of the implicit gender-science stereotype using the Implicit Association Test (IAT).
• Replication of the study on a subsample (N=312) after a two-year interval.

Main Results:

• Consistent associations were found between specific SNP variations within the COMT and BDNF genes and the implicit gender-science stereotype.
• These genetic associations were replicated in the subsample after two years, indicating stability.
• The findings suggest that genetic variations in these neurobiological systems are linked to individual differences in the gender-science stereotype.

Conclusions:

• Genetic variants in the COMT and BDNF genes are implicated in the variation of the implicit gender-science stereotype.
• These results contribute to understanding the neurogenetic underpinnings of implicit social cognition and stereotypes.
• The study highlights potential biological influences on the development and persistence of gender-science biases.