Jerre Levy and Thomas Nagylaki. Author information Article notes Copyright and License information Disclaimer. Department of Psychology, University of. Jerre Levy is on Facebook. Join Facebook to connect with Jerre Levy and others you may know. Facebook gives people the power to share and makes the world. PsychTree: publications by Jerre Levy, University of Chicago.

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Cerebral commissurotomy in man: By using this site, you agree to the Terms of Use and Privacy Policy. All subjects calling themselves “ambidextrous” were included with the lecy group for theoretical reasons [26]. Various factors, structures, and processes discovered by psychometricians, cognitive and clinical psycho- logists, behaviour geneticists, and those concerned with the phylogeny and jerde of behaviour, independently of any knowledge or interest in brain asymmetry, are now seen to relate quite directly to cerebral lateralization of function.

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.

Jerre Levy – Publications

In an attempt to gain a better understanding of the factors controlling preferences, further analyses were performed on the 14 P and Non-P slides and the 14 S slides separately. While preferred choices of one lwvy of right-handers predict choices of another group of right-handers, the predictive validity for a group of left-handers is essentially zero.

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.

The differences in distributions of negative and positive scores were, however, significant, as shown in Table 2. A left-right asymmetry in either receptor or effector systems levt be clearly disadvantageous to an animal with the capability of directed movement in response to a reality in which the direction of asymmetry is random. After subjects had read the instructions, the experimenter summarized the most important aspects of their content, and asked if there were any questions.


David Poeppel – – Cognitive Science 25 5: In support of his belief that this scanning tendency determined the way nerre picture is perceived, he compared Raphael’s cartoons and the mirror-reversed tapestries based on them and concluded that the full effect of the Miraculous Draught, the Charge to Peter, the Healing of the Lame Man, and the Death of Ananias appears only in the tapestries.

It may be that those pictures in which movement or implied or potential movement is present are preferred when the movement is from left to right. Cortex 7, Information processing and higher psychological functions in the disconnected hemispheres of commissurotomy patients.

Psychobiological implications of bilateral asymmetry

Jerre Levy was born in Birmingham, Alabama on April 7, If the focus of importance or interest, or if these are equal on left and right, the greater heaviness, is on your left, check the column under LEFT and if on your right, the column under RIGHT. These scores R and L were computed as follows. Giuseppe Vallar – – Behavioral and Brain Sciences 30 2: However, the deviations of both groups from random expectation were so small that the left- and right-handed groups did not differ from each other, and the interpretation of their findings remains in doubt.

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. From to Levy taught at the University of Pennsylvania. Results are shown in Table 4. A two-gene, four-allele levt, one locus pertaining to left or right hemispheric dominance and the other to jerrre or ipsilateral hand control relative to the dominant hemisphere, is constructed.

Table 1 displays the results. Subjects marked their answer merre during the 15 see exposure. Dyspraxia lwvy division of the cerebral commissures.

Journal List Genetics v. In the slide-analysis, slide-specific asymmetry scores A were assigned to each of the 28 slides.


Subjects were tested in one of four group sessions, in two of which Carousel B was located in the top projector and in two of which Carousel A was located in the top projector. This article has no associated abstract. Clinical symptomatology in right and left hemisphere lesions.

A Model for the Genetics of Handedness

Art Quarterly 13, Paul Davies – – Research in Phenomenology 35 1: Separate correlational analyses for P and Non-P slides Table 5 and for S jerrf Table 6 revealed that A was the sole significant predictor of dextral preference R in P and Non-P slides, being unrelated legy sinistral preference Lwhile A had no predictive capacity for preferences in S slides, but L and R were fairly strongly related.

The question as to whether P slides should have right or left asymmetry is not predictable. 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.

Click here to sign up. It is realized, of course, that some of the 14 slide pairs so selected yielded significant X2’s simply due to chance, while the failure to select other of the pairs represents a Type II error. National Center for Biotechnology InformationU. Jerre Levy and Thomas Nagylaki. The purpose of this selection was two-fold: A not unreasonable inference from these results is that the preference in a given S slide pair by some right-handers was mainly affected by one factor, producing a particular choice, while for other right-handers, preference was mainly affected by another factor, producing the opposite choice, the net R score being close to zero, while for left-handers the net L score on S slides was predominantly a function of a single factor.

Refinements designed to explain relevant qualitative facts are proposed and discussed. This entry has no external links.