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Pedophilia and hand preference: A meta-analysis.

Clara C Stein1, Boris Schiffer1, Marietta Papadatou-Pastou2,3

  • 1Division of Forensic Psychiatry, LWL-University Hospital, Ruhr University Bochum, Bochum, Germany.

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A meta-analysis of 14 studies found no evidence that atypical handedness is more common in individuals with pedophilic disorder. These findings suggest that atypical handedness is not a reliable biomarker for pedophilia.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Developmental Psychology

Background:

  • Pedophilic disorder is associated with neurodevelopmental differences.
  • Atypical handedness is a potential biomarker for neurodevelopmental disorders.
  • Previous studies suggested a link between atypical handedness and pedophilia, but lacked comprehensive synthesis.

Purpose of the Study:

  • To conduct a meta-analysis synthesizing existing literature on handedness in individuals with pedophilic disorder.
  • To determine if atypical handedness is more prevalent in pedophilia compared to the general population.
  • To assess the suitability of atypical handedness as a biomarker for pedophilic disorder.

Main Methods:

  • A pre-registered meta-analysis was performed on 14 studies.
  • Studies were identified through searches in PubMed, Web of Science, and Google Scholar.
  • Hand preference data from 1245 individuals with pedophilia and 5703 controls were analyzed using random-effects frequentist and Bayesian meta-analyses.

Main Results:

  • The meta-analysis found no evidence supporting higher rates of atypical handedness in individuals with pedophilic disorder.
  • No significant heterogeneity, small-study bias, or publication bias was detected across the analyses.
  • Results were consistent regardless of the handedness classification method used.

Conclusions:

  • Atypical handedness is not a suitable biomarker for identifying pedophilic disorder.
  • The prevalence of atypical handedness does not differ between individuals with pedophilia and control groups.
  • Further research should explore other potential neurodevelopmental markers for pedophilic disorder.