Modification of the Edinburgh Handedness Inventory: a replication study

Area of Science:

• Psychology
• Neuroscience
• Human Development

Background:

• The Edinburgh Handedness Inventory (EHI) is a widely used tool for assessing handedness.
• Understanding handedness is crucial for research in cognitive development and neurological function.

Purpose of the Study:

• To re-examine the psychometric properties of the Edinburgh Handedness Inventory.
• To assess the impact of item modification on the inventory's validity and reliability.

Main Methods:

• Administered the Edinburgh Handedness Inventory to 1224 high school students.
• Employed confirmatory factor analysis to evaluate the instrument's psychometric properties.
• Modified the inventory by removing problematic items and re-analyzed data.

Main Results:

• The original Edinburgh Handedness Inventory demonstrated poor measurement properties.
• Item removal improved the internal consistency and validity of the EHI.
• Modifications altered the classification of mixed-handers, with the original version identifying more mixed-handers.

Conclusions:

• The Edinburgh Handedness Inventory requires psychometric refinement for accurate handedness assessment.
• Modified versions of the EHI may offer improved validity and reliability.
• Handedness classification, especially for mixed-handers, is sensitive to inventory modifications.