A cross-sectional study was conducted in which level of mood recognition was assessed from early childhood through old age. Asymptotic performance was obtained on facial affect recognitions tasks from ages 3-34 yrs. There was a progressive decline in facial affect recognitions beginning at age 45, with the principal problem that of recognizing angry faces. With respect to auditory prosody, there was an improvement in recognition level from ages 3-12 yrs. Performance remained asymptotic through age 43 and then began to decline increasingly beyond age 45.
The question was raised whether the Gestalt law of grouping by proximity is based on proximity of stimuli on the retina or perceived proximity in phenomenal space. To tease apart these 2 possibilities an earlier experiment of Corbin was repeated in which the stimulus array is tilted back into the 3rd dimension. By including a measure of constancy for the perceived distance between points it was possible to show in 2 experiments, that the crucial factor is phenomenal proximity. This finding questions the Gestalt assumption that grouping is based on certain objectively given features within the stimulus.
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