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Handedness inventories accurately measure hand preference and consistency. Higher scores on these inventories correlate with more frequent preferred hand use and greater manual fluency.

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Area of Science:

  • Neuroscience
  • Psychology
  • Human Behavior

Background:

  • Hand preference is typically assessed using self-report questionnaires called handedness inventories.
  • These inventories ask about hand use and consistency in unimanual tasks.
  • Empirical validation of these self-reported measures is limited.

Purpose of the Study:

  • To investigate the validity of handedness inventory scores.
  • To determine if self-reported hand preference and consistency align with actual behavior and performance.

Main Methods:

  • Participants completed a handedness inventory.
  • Following a brief delay, participants performed inventory tasks, choosing their hand spontaneously.
  • Participants' speed was measured performing tasks with each hand.

Main Results:

  • Individuals with higher handedness inventory scores demonstrated more frequent use of their preferred hand during spontaneous task performance.
  • A positive correlation was found between self-reported consistency and the magnitude of the preferred hand advantage in speed.
  • These findings support the validity of handedness inventory scores.

Conclusions:

  • Handedness inventory scores are valid indicators of actual hand preference and behavioral consistency.
  • Self-reported consistency on handedness inventories relates to both spontaneous hand selection and manual dexterity.
  • The study provides empirical support for the use of handedness inventories in research and clinical settings.