Four experiments were designed to investigate the meridian effect on attentional orienting (characterized by a larger cost when the cue and target fall in different visual fields relative to when they fall in the same fields) when employing an endogenous cue. In Experiment I a circular display of eight boxes was employed and no meridian effect was found. In Experiment 2 three displays were compared: Semicircular, vertical, and horizontal. No meridian effect was found in the semicircular display. However, in the two linear displays (vertical, horizontal) there was a significant meridian effect. Experiments 3 and 4 were designed to investigate an attentional gradient hypothesis. In all experiments a distance effect was found. Nevertheless, the distance effect was not directly related to the actual distance between the target positions. The results suggest the existence of two attentional gradients that develop simultaneously in the visual field: an excitation gradient centred at the cued location (the strongest excitation) and an inhibition gradient, centred at the fixation point (the strongest inhibition).
机构:
Northwestern Univ, Dept Psychol, Evanston, IL 60208 USANorthwestern Univ, Dept Psychol, Evanston, IL 60208 USA
Guzman-Martinez, Emmanuel
Grabowecky, Marcia
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机构:
Northwestern Univ, Dept Psychol, Evanston, IL 60208 USA
Northwestern Univ, Interdept Neurosci Program, Evanston, IL 60208 USANorthwestern Univ, Dept Psychol, Evanston, IL 60208 USA
Grabowecky, Marcia
Palafox, German
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机构:
Univ Nacl Autonoma Mexico, Dept Psychol, Mexico City 04510, DF, MexicoNorthwestern Univ, Dept Psychol, Evanston, IL 60208 USA
机构:
Hong Kong Inst Educ, Dept Special Educ & Counseling, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Inst Educ, Dept Special Educ & Counseling, Hong Kong, Hong Kong, Peoples R China
Liu, Duo
UNDERSTANDING DEVELOPMENTAL DISORDERS OF AUDITORY PROCESSING, LANGUAGE AND LITERACY ACROSS LANGUAGES: INTERNATIONAL PERSPECTIVES,
2014,
: 169
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188
机构:
MIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USA
MIT, McGovern Inst Brain Res, Cambridge, MA 02139 USA
Harvard MIT Div Hlth Sci & Technol HST, Cambridge, MA 02139 USAMIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USA
Gabrieli, John D. E.
Norton, Elizabeth S.
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机构:
MIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USA
MIT, McGovern Inst Brain Res, Cambridge, MA 02139 USA
Tufts Univ, Dept Child Dev, Medford, MA 02155 USAMIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USA