Developmental differences in the use of peripheral vision during catching performance.
Recently, it has been argued that peripheral vision may control adequate orientation of catching limbs, although questions have been raised of whether this remains the case as skill develops. The aim of the present study was to remediate previous methodological deficiencies to verify whether developmental differences exist in the extent of the functional visual field. A further aim included examining the importance of peripheral vision as a control process for effector orientation during catching without recourse to an occlusion technique. Previous arguments that peripheral vision may be necessary in controlling one-handed catching performance were extended to a two-handed catching task. Male subjects (n = 80) were required to perform a two-handed catch and simultaneously process a peripheral visual signal presented either early in, in the middle of, or late in flight. Developmental differences were noted between the age groups (mean ages = 10, 12, 16, and 20 years) in the ability to divide visual attention between the ball in flight, location of hands, and the peripheral cue acting as a probe. Evidently, the ability to allocate control of effects to the articular proprioceptive system develops with age because there was an obvious improvement in peripheral visual processing performance during the late segment of flight. Specifically, it appears that between the ages of 12 and 15 years catchers develop the capacity to increase the functional control of the articular proprioceptive system, as indicated by a significant decrease in peripheral visual errors during the late segment made by the latter age group. Limited evidence is also presented suggesting that the successful allocation of greater control to the articular proprioceptive system changes as a function of practice and experience with the specific central task, thus overcoming initial reliance on sight of the catching hands.
Davids
K
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Department of Sport and Recreation Studies, Liverpool Polytechnic.