Modulating Children's Manual Preference Through Spontaneous Nondominant Hand Use

Area of Science:

• Child development
• Motor control
• Hand preference

Background:

• Hand preference emerges in early childhood.
• Environmental factors and practice can influence manual preference development.
• Understanding factors that shape hand preference is crucial for developmental research.

Purpose of the Study:

• To investigate if repeated use of the non-preferred hand can alter manual preference in young children.
• To determine the long-term effects of induced non-preferred hand use on motor task performance.
• To explore the role of confidence in planning movements after non-preferred hand practice.

Main Methods:

• Right-handed 4-5-year-olds were induced to use their left hands through play-based tasks in a biased workspace.
• Children performed reaching, grasping, and inserting tasks before and after the intervention.
• Manual preference was assessed after 1 day and 14 days of rest following the intervention.

Main Results:

• Children showed increased left-hand use in a probing task after the intervention.
• Following 14 days of rest, children exclusively used their left hands for tasks involving the leftmost card positions.
• The findings indicate a significant shift in manual preference towards the non-preferred hand.

Conclusions:

• Repeatedly engaging the non-preferred hand can lead to a lasting increase in its use.
• This suggests that environmental exposure and practice can modify established manual preferences in young children.
• Increased confidence in planning movements may underlie the observed changes in hand use.