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Detection of a visual signal requires information to reach a system capable of eliciting arbitrary responses required by the experimenter. Detection latencies are reduced when subjects receive a cue that indicates where in the visual field the signal will occur. This shift in efficiency appears to be due to an alignment (orienting) of the central(More)
Both orthographic regularity and visual familiarity have been implicated as contributors to the efficiency of processing visually presented words. Our studies sought to determine which of the internal codes representing words in the nervous system are facilitated by these two variables. To do this, sets of letter strings in which orthography and familiarity(More)
  • Posner, C R R Snyder, +7 authors S A Magentoencephalographic
  • 2003
The experiment consisted of 12 blocks of 40 trials each, resulting in 120 trials per experimental condition. Blocks were administered in random order. The responding hand was changed halfway through the experiment, and the sequence of hand usage was counterbalanced across subjects. One subject was excluded from further analysis because of difficulty in(More)
Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment(More)
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