Abstract
Earlier studies with behavioral procedures demonstrated increased recognition efficiency after training at distances greater than initially obtained on visual acuity tests. These changes have been regarded as improved acuity and attributed to increased control over accommodation. This study investigated these assumptions. Improved acuity was investigated by observing the generalization of effects in recognition efficiency from trained to untrained stimuli. Control over accommodation was investigated by observing the effects of training on recognition efficiency at increased distances with individuals who were physically incapable of accommodating. Neither hypothesis was supported. However, increased efficiency at increased distances was demonstrated with subjects who had had the physical mechanism for accommodation surgically removed. Implications for training are discussed.
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