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Auditory perception and the control of spatially coordinated action of deaf and hearing children
G J Savelsbergh1, J B Netelenbos, H T Whiting
1Department of Psychology, Faculty of Human Movement Sciences, Free University, Amsterdam, The Netherlands.
Insights
Deaf children exhibit impaired catching skills for objects entering their visual field, linked to slower reaction times. This suggests auditory deprivation impacts visually guided actions.
Area of Science:
- Developmental Psychology
- Auditory Neuroscience
- Motor Control
Background:
- Auditory stimulation is crucial for developing visual orientation behaviors from birth.
- Deaf individuals lack auditory input, potentially affecting visual-spatial processing and object tracking.
- Catching involves complex coordination of visual and motor systems, influenced by temporal and spatial cues.
Purpose of the Study:
- To investigate differences in catching ability between deaf and hearing children.
- To determine if auditory loss affects reaction time and orientating movements in visually guided tasks.
- To explore the impact of early auditory deprivation on sensorimotor development.
Main Methods:
- Experiment 1: Compared catching performance of deaf and hearing children (10-13 years) with balls approaching from within vs. outside the visual field.
- Experiment 2: Assessed reaction times and movement times during a catching task to differentiate between motor execution and sensory processing deficits.
- Utilized standardized behavioral observation and timing measurements.
Main Results:
- Deaf children showed significantly poorer catching ability when objects approached from the periphery or outside their visual field compared to hearing children.
- No significant differences in catching ability were observed when objects entered the visual field directly.
- Deaf children exhibited slower reaction times, but movement times were comparable to hearing children, indicating a sensory processing rather than motor execution deficit.
Conclusions:
- Auditory deprivation during development can lead to deficits in visually guided actions, particularly those requiring anticipation and spatial-temporal coordination.
- Slower reaction times in deaf children suggest impaired integration of peripheral visual cues, potentially due to lack of auditory-motor cross-modal development.
- Findings highlight the critical role of early auditory experience in shaping sensorimotor skills essential for interacting with dynamic environments.
Abstract:
From birth onwards, auditory stimulation directs and intensifies visual orientation behaviour. In deaf children, by definition, auditory perception cannot take place and cannot, therefore, make a contribution to visual orientation to objects approaching from outside the initial field of view. In experiment 1, a difference in catching ability is demonstrated between deaf and hearing children (10-13 years of age) when the ball approached from the periphery or from outside the field of view. No differences in catching ability between the two groups occurred when the ball approached from within the field of view. A second experiment was conducted in order to determine if differences in catching ability between deaf and hearing children could be attributed to execution of slow orientating movements and/or slow reaction time as a result of the auditory loss. The deaf children showed slower reaction times. No differences were found in movement times between deaf and hearing children. Overall, the findings suggest that a lack of auditory stimulation during development can lead to deficiencies in the coordination of actions such as catching which are both spatially and temporally constrained.