An experiment is reported which demonstrates that the features used to detect a character in arrays of similar forms are a function of the stimulus context in which the target is embedded. With the use of blocked and randomised design it was shown that prior knowledge of the background aided search when the feature which was relevant for one background was irrelevant for another, but no significant effect of prior knowledge was obtained when the same feature was useful for the backgrounds.
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References
1.
CorcoranD W JJacksonA, 1977“Basic processes and strategies in visual search” in Attention and Performance VI Ed. DornicS (Hillsdale, NJ: Lawrence Erlbaum Associates).
2.
LindsayP HNormanD A, 1972An Introduction to Psychology (New York: Academic Press).
3.
NeisserU, 1967Cognitive Psychology (New York: Appleton-Century-Crofts).
4.
RabbittP M A, 1967“Learning to ignore irrelevant information”American Journal of Psychology801–13.
