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Discrimination of grip force for preschool children aged 5 to 6 years
T Murase1, H Kinoshita, K Ikuta
1Faculty of Health and Sport Sciences, Osaka University, Japan. i64605a@center.osaka-u.ac.jp
Insights
Preschool children
Area of Science:
- Developmental psychology
- Motor control
- Sensory perception
Background:
- Grip force discrimination is crucial for motor control.
- Previous research has primarily focused on adult populations.
- Understanding developmental changes in force discrimination is important for child development studies.
Purpose of the Study:
- To investigate grip force discrimination abilities in preschool children.
- To determine how thresholds of discrimination change with varying standard force levels.
- To compare findings in children with existing adult data.
Main Methods:
- 30 preschool children (5-6 years) participated.
- Grip force discrimination was assessed using standard stimuli of 1.0, 2.0, and 3.0 kgf.
- Discrimination was measured by lower threshold, upper threshold, and interval of uncertainty, with no significant gender differences observed.
Main Results:
- Discrimination thresholds (lower, upper, and interval of uncertainty) increased with higher standard force levels.
- Weber fractions did not remain constant across different stimulus intensities.
- Findings differed from previous adult studies where Weber fractions were constant.
Conclusions:
- Preschool children's grip force discrimination abilities are influenced by stimulus intensity.
- The relationship between force discrimination and stimulus intensity in children differs from adults.
- Further research is needed to explore the developmental trajectory of force perception.
Abstract:
The ability to discriminate grip force was investigated in 30 preschool children aged 5 to 6 years in an experiment controlling for motivation and muscle fatigue. The subjects were required to maintain a relatively high force during the discrimination with forces of the standard stimulus being 1.0, 2.0, and 3.0 kgf. Comparison stimuli changed at an interval of 0.1 kgf. Discrimination was measured in terms of the lower threshold, upper threshold, and interval of uncertainty. Since the statistical analyses indicated that there were no significant gender differences, data for boys and girls were combined. Although the upper and lower thresholds and the interval of uncertainty increased with the force required by the standard stimuli, Weber fractions did not remain constant when the stimulus intensity changed, unlike the findings in previous studies for adults.