Abrupt learning and retinal size specificity in illusory-contour perception

Nava Rubin, Ken Nakayama, Robert Shapley

Research output: Contribution to journalArticle

Abstract

Background: In behavioral studies of learning, a distinction is commonly made between gradual and abrupt improvements in performance. The learning of perceptual and motor skills is often characterized by gradual, incremental improvement, and is found not to generalize over stimulus manipulations such as changes in the size or location of the retinal image. In contrast, marked improvement in performance can occur suddenly-a phenomenon which has been termed 'insight'. Consequently, the brain mechanisms subserving the two types of learning are commonly thought of as distinct. Here, we examine learning of a perceptual task in which improvement appears to exhibit characteristics of both gradual and abrupt learning. Results: We describe experiments on illusory-contour perception in which the observers underwent an abrupt, dramatic improvement in performance, resembling an incident of insight. At the same time, however, the phenomenon showed a degree of stimulus-specificity that was previously thought to characterize incremental, gradual learning. The improvement was triggered only by specific visual stimuli, whereas other, quite similar, stimuli were found to be ineffective for training; the learning did not generalize to a new retinal image size, and rertraining was necessary for different-sized images. Conclusions: The juxtaposition of abrupt and stimulus-specific learning that we observed suggests that the distinction between the two forms of learning needs to be revised. Rather than postulating two distinct mechanisms, incremental and insightful learning need to be addressed within a single framework. In particular, the findings suggest that learning may involve interactions between multiple levels of representations of the stimulus.

Original languageEnglish (US)
Pages (from-to)461-467
Number of pages7
JournalCurrent Biology
Volume7
Issue number7
StatePublished - Jul 1 1997

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Form Perception
Brain
learning
Learning
Experiments
Motor Skills

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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Abrupt learning and retinal size specificity in illusory-contour perception. / Rubin, Nava; Nakayama, Ken; Shapley, Robert.

In: Current Biology, Vol. 7, No. 7, 01.07.1997, p. 461-467.

Research output: Contribution to journalArticle

Rubin, Nava ; Nakayama, Ken ; Shapley, Robert. / Abrupt learning and retinal size specificity in illusory-contour perception. In: Current Biology. 1997 ; Vol. 7, No. 7. pp. 461-467.
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