Orienting Attention Within Visual Fields. How Efficient Is Interhemispheric Transfer?

Curtis Hardyck, Christine Chiarello, Nina Dronkers, Gregory V. Simpson

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


Five experiments are reported examining the effect of attentional orienting on lexical decisions within visual half-fields. In Experiment 1, following baseline performance, subjects were instructed to improve performance to the right or left of the fixation point. In Experiment 2, trials were run in blocks with all items to one side of the fixation point. In Experiment 3, completely valid position indicators as to the location of the next item to be shown were presented prior to the stimulus item. In Experiment 4, to examine practice effects, no instructions or cuing were given to subjects. In Experiment 5, subjects were urged to improve performance, but with no instructions as to location. As a summary of our results, it can be stated that (a) consistent visual field differences in lexical decision performance are present, even when subjects were informed, prior to viewing, of the spatial location of the next stimulus item. (b) Lexical decision information initially input to one cerebral hemisphere is primarily processed in that hemisphere. Interhemispheric transfer of this type of language information seems to be done primarily as the end product of a cognitive process.

Original languageEnglish (US)
Pages (from-to)650-666
Number of pages17
JournalJournal of Experimental Psychology: Human Perception and Performance
Issue number5
StatePublished - Oct 1985

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience
  • Cognitive Neuroscience


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