Writing forces associated with four pencil grasp patterns in grade 4 children

Area of Science:

• Occupational Therapy
• Developmental Psychology
• Biomechanics

Background:

• Pencil grasp is a key factor in handwriting development.
• Previous research has explored the impact of different grasps on handwriting performance.
• Understanding the biomechanics of various grasps is crucial for effective interventions.

Purpose of the Study:

• To investigate differences in handwriting kinetics, speed, and legibility among four pencil grasps.
• To analyze the relationship between grasp patterns and grip/axial forces.
• To determine the impact of a short copy task on these parameters.

Main Methods:

• Seventy-four Grade 4 students participated in the study.
• Handwriting assessments were conducted before and after a 10-minute copy task.
• Grip and axial forces were measured using an instrumented stylus and force-sensitive tablet, analyzed via multiple linear regression.

Main Results:

• No significant kinetic differences were found among individual grasps or grasps grouped by finger count on the barrel.
• Adducted grasps exhibited higher mean grip and axial forces compared to other grasp types.
• Kinetic differences related to thumb position did not impact handwriting speed or legibility.

Conclusions:

• Grip forces were largely consistent across different pencil grasps.
• Handwriting interventions for difficulties should prioritize improving speed and letter formation over modifying grasp patterns.
• Focusing on grasp pattern alone may not effectively address handwriting challenges.