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Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
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Building causal knowledge in behavior genetics.

James W Madole1,2, K Paige Harden1

  • 1Department of Psychology, University of Texas at Austin, Austin, TX, USA jmadole@utexas.edu harden@utexas.edu.

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Summary

Behavior genetics explores heredity's role in human behavior. This study proposes a framework using counterfactual reasoning to understand genes as causes, even if they are shallow causes with limitations.

Keywords:
behavior geneticscausal inferencecounterfactual reasoningexperimental designsindividual differencesphilosophy of science

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Area of Science:

  • Behavior genetics
  • Social sciences
  • Genomics

Background:

  • Behavior genetics investigates heredity's influence on human behavior and life outcomes.
  • Advances in genomics enable gene discovery for traits like educational attainment and substance use disorders.
  • Understanding genes as causes is crucial for maximizing potential and minimizing harm in behavior genetics.

Purpose of the Study:

  • To propose a framework for identifying and interpreting genetic causes of human behavior.
  • To apply this framework to advance causal knowledge in the social sciences.
  • To analyze the nature of genes as causes, particularly within-family genetic effects.

Main Methods:

  • Utilizing counterfactual reasoning as a cornerstone for causal inference.
  • Comparing within-family genetic effects to average treatment effects (ATEs) from randomized controlled trials (RCTs).
  • Analyzing genetic causes as "shallow causes" that are non-unitary, non-uniform, and non-explanatory.

Main Results:

  • Within-family genetic effects are analogous to ATEs from RCTs, representing shallow causes.
  • Shallow causes operate within complex systems, yield heterogeneous individual effects, and lack mechanistic detail.
  • Despite limitations, shallow causal knowledge aids in understanding behavioral etiology and treatment effect heterogeneity.

Conclusions:

  • A counterfactual-based framework can clarify the role of genes as causes in human behavior.
  • Recognizing genetic causes as "shallow" is essential for accurate interpretation and application.
  • This approach enhances understanding of behavioral development and informs social science research.