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These two studies strongly suggest that during the act of visual perception attention is biased to the left, giving rise to the perceptual asymmetries observed.

A Model for the Genetics of Handedness

Leby the first three of these, the center of focus is on the left in the cartoons and on the right in the tapestries, while in the Death of Ananias, this is reversed.

Jerre Levy was born in Birmingham, Alabama on April 7, Gal Yehezkel – – Ratio 27 1: These results, taken together, are interpreted to mean that, in viewing pictures, the right visuo-spatially specialized hemisphere is selectively activated, producing a bias of attention toward and a psychological weighting of the left side of space.

Giuseppe Vallar – – Behavioral and Brain Sciences 30 2: Norman Adler for allowing her to duplicate 32 of his vacation slides, and to Drs. Art Quarterly 13, Slides were projected through two duplicate Sawyer 2 x 2 in. In one of each of the pairs of sessions Projector 1 was the top projector and in the other, Projector 2 was the top projector. Jegre after section of the cerebral commissures.

Jerre Levy

These observa- tions are similar to those of SWARTZ and HEWITT [27] who found that a very small, but significant, majority of right-handers preferred the original versions of famous paintings as compared with their mirror images, while left-handers did not.

Check your answer on jerrw answer sheet under the appropriate column.

It is in excellent agreement with all quantitative information regarding this problem. Apparently, however, the net preferences manifested, although weak, were, to the extent they were predictable, almost entirely due to the same factor which controlled sinistral preferences.

Trevarthen reasoned that in an animal with laterally specialized functions in the two sides of the brain, selective hemispheric activation could and would emerge from cognitive activity specialized in a single hemisphere and would be reflected in an orientation reflex, or its covert homologue, an attentional bias, to the contralateral half of space. It is obvious that the stimulus determinants of preference reside in some aspect of left- right asymmetry.


The increases in the RA and RL correlations when L and A, respectively, are partialled out, mean that the two factors affecting dextral preference in the slides are negatively correlated, as seen in the AL correlation when variance due to R is eliminated. Distribution of negative and positive scores Number of Subjects with: Wanderer – – Semiotica KINSBOtmNE[24] confirmed, as Trevarthen suggested, that processing of information in the left or right side of space is enhanced when the contralateral hemisphere is selectively activated by laterally specialized thinking.

WOLFFLIN had first suggested in in Paul Wolters Festschrift re- printed in [2] that there is a strong tendency to scan a picture from left to right, the eye terminating jerrs scan on the right half of the picture where the most important content is represented. Fifth, the degree of per- ceived asymmetry in P and Non-P slides should be equal when compared after the control slide baseline has been subtracted out, since, once this is done, psychological asymmetry is removed.

The preferred version was labeled ” P ” and was assigned a weighted score which was the Z-equivalent of the obtained X2, jeree the non-preferred version, ” N o n – P ‘was assigned a negative Z- equivalent. It should be noted that R and L scores were so assigned that any P slide shown in Study II should, on the average, have a positive R score, while any Non-P slide should, on levvy average, have a negative R score.

Superiority of the minor hemisphere in commissurotomised man for the perception of part- whole relationships. Dual functional asymmetry of the brain in visual perception.

There was a total of 14 such slide pairs, in each of which one version was preferred to the other by at least 21 of the 31 SD subjects.

Paula Tallal – – Behavioral and Brain Sciences 4 1: A final point which deserves emphasis relates to the evolution of lateral specialization. Refinements designed to explain relevant qualitative facts are proposed and discussed.

Lateral dominance and aesthetic preference | Jerre Levy –

Oevy were marked on an answer sheet. Sally Walters – – Behavioral and Brain Sciences 23 4: Brain 13, Unfortunately, however, it is not only likely, but almost certain, that no understanding of how lateralization of the brain affects preference can be gained unless invariances in preferred and non-preferred pictures are found. On associated eye movements produced by cortical faradization of the monkey’s brain. Left lrvy right in pictures.


During the last 10 yr, and particularly during the last 5 yr, more and more psychologists have come to recognize the pervasive consequences for psychological uerre which result from cerebral lateralization. Cortex 7, Neuropsychologia 12, However, these inferential errors can only result in a conservative underestimate of the differences in left- and right-handers, if such exist.

However, in order to compare the magnitudes of perceived asymmetry, regardless of direction, either the absolute values or the square of the values must be compared.

Subjects were simply asked to view the 97 slide pairs and to choose the member of each pair that they preferred. Hypnotizability, laterality of eye movement and functional brain jerr.

Psychobiological implications of bilateral asymmetry

However, W61fftin believes that the position of the dying Ananias on the left of the tapestry, which, according to him, is an abnormal position, was a deliberate attempt by Raphael to induce shock in the viewer. Lateral organization, perceived depth and title preference in pictures.

Since neither the opinions o f o f art historians n o r psychologists are o f m u c h value, in the absence o f empirical support, f o r predicting which o f two m i r r o r – s y m m e t r i c pictures will be preferred b y the m a j o r i t y dextrals? Bilateral Asymmetry of Function. However, it is quite conceivable that if an asymmetrical inherent biasing of attention into the left half of space during visual perception exists, those pictures which tend to correct for this imbalance by having the center of focus, or most important content, on the right, would be perceived as the more aesthetically pleasing.

Neither of these factors even approached significance for any of the four groups classified by handedness and sex, and subjects within each category were consequently combined across sessions. The preference data from Study I for these slides were then reanalyzed to determine slide-specific preference scores for the entire group of right-handers Rincluding both experimental and Group SD subjects, and for the group of 31 left-handers L.