Hemispheric asymmetry: Verbal and spatial encoding of visual stimuli.

Geffen, Gina; Bradshaw, John L.; Nettleton, Norman C.

doi:10.1037/h0033265

Cited by 261 publications

(81 citation statements)

References 15 publications

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“…The magnitude and consistency of these RT differences (cf. Corballis et al, 1978) implicate interhemispheric transfer processes as the probable locus (Geffen, Bradshaw, & Nettleton, 1972). Indeed, Cohen (1975) has found that for version judgments, rotated alphanumeric characters are discriminated faster in the left visual field than in the right visual field.…”

Section: Discussionmentioning

confidence: 99%

Naming and categorization of tilted alphanumeric characters do not require mental rotation

White

1980

Bull. Psychon. Soc.

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Single letters and numbers were shown at different angular orientations in the frontal plane, in both forward and backward (mirror-image) versions. In three separate conditions, subjects were required to discriminate the stimuli on the basis of version, category (letter, number, and name (G, 2, etc.). There was a pronounced effect of orientation on version judgments but none at all on category and name judgments, indicating that the identification of a tilted character requires neither the assignment of a cognitive up-down axis nor mental rotation to the upright. Nevertheless, reaction times for backward versions were slower than reaction times for forward versions in both category and name conditions, implicating some sort of interhemispheric transfer process. No support was obtained for the so-called "conceptual category" effect in that reaction times for category judgments were consistently slower than reaction times for name judgments.

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Section: Discussionmentioning

confidence: 99%

Naming and categorization of tilted alphanumeric characters do not require mental rotation

White

1980

Bull. Psychon. Soc.

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“…The present task is essentially identical with the" physical identity" condition in the experiment of Cohen (1972) and " physical matching" condition of experiment by Geffen, Bradshaw and Nettleton (1972). In the" physical identity" condition of Cohen's study, subjects were asked to judge if the paired Alphabet letters were identical with each other in their physical configurations.…”

Section: Discussionmentioning

confidence: 99%

Different stages of <I>Kanji</I> processing and their relations to functional hemisphere asymmetries

Hatta

1981

Jpn. Psychol. Res

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A series of the experiments was conducted to investigate hemisphere specialization for different levels of processing visually presented Kanji (Japanese logograph) stimuli. In the first experiment, subjects made a physical match of the paired Kanjis and showed faster RTs to the stimuli in their left visual fields. Subjects performed a lexical decision task in the second experiment, in which bona fide and counterfeit Kanjis were presented to either the left or the right visual field, and showed no difference between two visual fields. In the third experiment, subjects judged whether or not the presented Kanji (left/right) appeared in the semantically appropriate side of the visual field. The results suggested a strong left hemisphere contribution. Possible mechanisms for Kanji processing at different levels were discussed within an information processing framework.

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“…Support for the visual/verbal hypothesis has been obtained in studies of cerebral hemispheric asymmetries in the letter-matching task (Cohen, 1972;Geffen, Bradshaw, & Nettleton, 1972). These experiments suggest that identity matches are performed in the right hemisphere of the brain, thought to be specialized for processing visual information, and that name matches occur in the left hemisphere, the verbal processor.…”

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confidence: 92%

Using visual codes for comparisons of pictures

Klatzky

Stoy

1974

Memory & Cognition

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In two experiments, Ss indicated for a series of trials whether or not two pictures of common objects had the same name (a positive or negative response, respectively). The pictures were separated by one of three interstimulus intervals (ISIs), and reaction time (RT) was recorded. In Experiment I, positive trials involved pictures that were identical (identity match), mirror images (mirror match), or physically different but had the same name (name match). The stimuli came from either an 8 set, in which name-match pairs were physically similar, or a D set, in which name-match pairs were physically dissimilar. The mean RTs for mirror and identity matches were virtually the same but faster than name-match RTs, an advantage that decreased with increasing 181. It was expected that name-match RT for the 8 set would be less than for the D set, indicating a facilitative effect of physical similarity; however, the identity-match RTs showed the expected difference. These results were extended in Experiment II, which involved only the identity and name matches, in pure sessions (which included positive trials of just one type) or mixed sessions (which included both types of positive trials). For mixed sessions, name-as well as identity-match RTs differed between the 8 and D sets. These results provide evidence for the use of visual codes in comparing nonidentical pictures, codes that apparently vary with experimental context and task demands.

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Hemispheric asymmetry: Verbal and spatial encoding of visual stimuli.

Cited by 261 publications

References 15 publications

Naming and categorization of tilted alphanumeric characters do not require mental rotation

Naming and categorization of tilted alphanumeric characters do not require mental rotation

Different stages of <I>Kanji</I> processing and their relations to functional hemisphere asymmetries

Using visual codes for comparisons of pictures

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