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Влияние неоднородных контекстов на решение задачи визуального поиска в условиях имплицитного научения
Objective.
The study tested the assumption that heterogeneity (low degree of similarity) of visual context elements facilitates the search for a given target under conditions of implicit internalization of contextual configurations. A visual search task was used: subjects had to detect a target (a black Landolt ring with a right or left gap) among distractor configurations of two types (similar and dissimilar to the target).
Methods and materials.
The subjects were divided into experimental and control groups. The primary distractors in both groups were black Landolt rings with a 45º, 135º, 225º, or 315º tear angle. The type of additional distractors differed: figures (triangles, squares, crosses, and stars) of different colors were demonstrated in the experimental group, and white Landolt rings were demonstrated in the control group. In both groups, some distractor configurations (contexts) were repeated throughout the procedure, while others were changed. The main procedure included 24 blocks (32 tasks per block), which were grouped into 6 epochs (4 blocks per epoch). The effects of implicit contextual internalization were assessed by the results of the last epoch.
Results.
The most pronounced contextual influence on the efficiency of target retrieval was found when the configurations of the main and additional distractors were maintained. When only the configuration of the additional distractors was repeated, target retrieval in both experimental and control groups took longer than when both contexts were changed.
Conclusions.
This result demonstrates the effect of contextual interference. The paper provides an interpretation of this effect.