Do response time advantage and interference reflect the order of processing of global- and local-level information?
ABSTRACT Navon's (1977) global precedence hypothesis was based primarily on the joint occurrence of two effects: a response time (RT) advantage for identifying global targets, and interference by global distractors on responding to local targets. Although the hypothesis has been questioned on the basis of experiments in which it has been shown that a local RT advantage and local interference can occur, it is still frequently assumed that these two effects are a valid measure of the order in which local and global levels of structure are processed. In the present experiment, this assumption was examined. Subjects identified target letters that occurred randomly at the global or local level in a divided-attention task. The visual angle subtended by the stimulus pattern was varied, a manipulation known to affect the relative speed of response to local- or global-level information. Local targets were identified faster than global targets at the larger visual angles, but there was no difference in RT at the smallest visual angle. Despite this change in RT advantage, the interference effect did not change as a function of the visual angle of the stimulus pattern. Moreover, global distractors interfered with responding to local targets but local targets had no effect on responding to global targets, which is exactly the opposite of the finding one would expect if RT advantage and interference reflected order of processing. These findings are not consistent with the assumption that RT advantage and interference reflect order of processing in a simple way.
- Perception & Psychophysics 09/1988; 44(2):172-81. · 1.37 Impact Factor
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ABSTRACT: In an experiment on normal adults it was demonstrated that local processing of a linguistic stimulus is superior in the left hemisphere, whereas global processing does not appear to be strongly lateralized.RésuméDans une expérience chez des adultes normaux, on a démontré que le traitement local d'un stimulus linguistique est supérieur au niveau de l'hémisphère gauche tandis que le traitement global ne semble pas être fortement latéralisé.ZusammenfassungIn einem Experiment, das an normalen Erwachsenen durchgeführt wurde, zeigte es sich, daβ das lokale Verarbeiten eines Sprachstimulus in der linken Hemisphäre besser gelingt, während die globale Verarbeitung nicht sehr stark lateralisiert zu sein scheint.Neuropsychologia 02/1979; 17(1):33-40. · 3.48 Impact Factor
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ABSTRACT: An account ofsame-different discriminations that is based upon a continuous-flow model of visual information processing (C. W. Eriksen & Schultz, 1979) and response competition and inhibition between the responses by which the subject signifies his judgment is presented. We show that a response signifyingsame will on the average be executed faster due to less priming or incipient activation of the competing response,different. In the experiment, the subjects matched letters on the basis of physical identity. The degree of priming ofdifferent responses on same trials and ofsame responses ondifferent trials was manipulated by an extraneous noise letter placed in the display. Latency for judgments onsame trials increased as the feature overlap of noise and target letters decreased. Latencies were shorter ondifferent trials when the noise letter was dissimilar to either target letter than when the noise letter was the same as one of the targets. These results were consistent with the response-competition interpretation.Perception & Psychophysics 10/1982; 32(3):261-70. · 1.37 Impact Factor