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Quantifying hand preference using a behavioural continuum
1University Department of Psychiatry, Oxford, UK.
Laterality
|October 30, 2004
Summary
The quantifying hand preference (QHP) method effectively differentiates subgroups within both left- and right-handed individuals. Handedness and motor skill demands influence how people interact with their environment.
Area of Science:
- Neuroscience
- Human Motor Control
- Psychology
Background:
- A novel approach to quantifying hand preference (QHP) was introduced by Bishop et al. (1996).
- This method uses a single behavioral measure to differentiate subgroups of right-handers based on reaching across the midline.
- The Edinburgh Handedness Inventory was used for comparison in categorizing participants.
Purpose of the Study:
- To determine if QHP can differentiate subgroups within the left-handed population.
- To assess if left-handers exhibit mirror-image behavior compared to right-handers.
- To investigate the influence of fine motor skill demands on extrapersonal space interaction.
Main Methods:
- Utilized the quantifying hand preference (QHP) behavioral measure.
- Assessed subgroups within both left- and right-handed populations.
- Examined tasks with varying levels of fine motor skill demands.
Main Results:
- QHP successfully discriminated subgroups in both left- and right-handed individuals.
- Left-handers mirrored right-handers' behavior, except in unskilled motor tasks.
- Left-handers showed increased non-preferred hand use in unskilled tasks.
Conclusions:
- The QHP method is effective for subgrouping both left- and right-handers.
- Environmental interaction in extrapersonal space is a key factor in manual dominance.
- Lateralization of fine motor skills interacts with attentional biases in manual dominance.
