A mathematical theory of optical illusions and figural aftereffects

If it is assumed that spurious enhancement of receptive field excitations near the intersection of image lines on the retina contributes to the cortical determination of the geometry of two-dimensional figures, an equation based on the least-squares fit of data points to a straight line-can be obtained to represent theapparent line. Such a fit serves as anextreemum on the precision with which a data set can be represented by a straight line. The disparity between theapparent line and the actual line that occurs in the case of peripheral (and to a lesser degree in more central regions of the retina) vision is sufficient to produce the perceptual errors that occur in the Poggendorff, Hering, and Mueller-Lyer illusions. The magnitude of the Poggendorff illusion as a function of the line angle is derived and experimentally tested. Blakemore, Carpenter, and Georgeson’s (1970) experimental data on angle perception are shown to fit this same function. Theapparent curve is derived for the Hering illusion. The Mueller-Lyer illusion is found to be a variation of the Poggendorff illusion. The equations are further developed and used to derive Pollack’s (1958) experimental results on figural aftereffects. The results involve onlyone experimentally determined coefficient that can be evaluated, within the limits of experimental error, in terms of physiological data. The use of these concepts provides a foundation for the abstract modeling of the initial phases of the central nervous system data reduction processes, including receptive field structure, that is consistent with the physiological limitations of the retina as a source of visual data, as well as with the findings of Hubel and Wiesel (1962).     

Family therapy in treatment of the deaf: a case report.

Deaf patients with psychological problems have developmental handicaps and clinical characteristics that reduce the effectiveness of traditional modes of psychotherapy. Attempts have been made to utilize individual and group therapy, but family therapy has been largely overlooked as a method of alleviating problems of the deaf. Clinical and research writings provide us with rich insights into the family dynamics of the deaf. These data suggest to the authors that the problems of deaf individuals are largely related to family problems, and therefore merit a family orientation as the focus for treatment. This paper describes an attempt to apply family therapy with a range of deaf patients over a period of two years. From a review of their work, the authors conclude that family therapy can be effective, particularly in the treatment of deaf adolescents and children.     

Teaching self-control of study behavior

A self-control procedure to improve study habits was taught to 38 volunteer students at the University of New Mexico summer school. The program involved the utilization of stimulus control procedures, self-reinforcement and punishment, and the SQ3R method (Robinson, 1946) of studying. Ss receiving the lessons showed a significant gain in grade point average (G.P.A.) for the three semesters following the study over the two preceding semesters, when compared with those not receiving the lessons. This gain was not due to any change in University grading standards. No difference in G.P.A. gains was found between Ss who received and discussed the lessons in group meetings and those who simply received them individually in written form.     

Organizing knowledge syntheses: A taxonomy of literature reviews

A taxonomy of literature reviews in education and psychology is presented. The taxonomy categorizes reviews according to: (a) focus; (b) goal; (c) perspective; (d) coverage; (e) organization; and (f) audience. The seven winners of the American Educational Research Association’s Research Review Award are used to illustrate the taxonomy’s categories. Data on the reliability of taxonomy codings when applied by readers is presented. Results of a survey of review authors provides baseline data on how frequently different types of reviews appear in the education and psychology literature. How the taxonomy might help in judging the quality of literature reviews is discussed, along with more general standards for evaluating reviews.     

Clinical approaches to the near-death experiencer

The literature on near-death experiences (NDEs) and their aftereffects has focused on the positive personality transformations and spiritual development that often follow an NDE, while it has neglected the emotional and interpersonal problems sometimes precipitated by the experience. We report general guidelines and specific interventions, developed at an interdisciplinary conference, to assist NDErs in coping with psychological difficulties following their experiences.This report was based on a conference on Clinical Approaches to the Near-Death Experience, sponsored by the International Association for Near-Death Studies, February 5–9, 1984, in Pembroke Pines, FL, and funded in part by a grant from the Institute of Noetic Sciences. The authors gratefully acknowledge the contributions of the other participants in that conference: Patricia Bahr, Boyce Batey, Sharon Batey, Nancy Bush, Kimberly Clark, M.S.W., Diane Corcoran, R.N., Ph.D., Elaine Durham, Linda Fleishman, Charles Flynn, Ph.D., Margaret Huddleston, Joan Kaye, Esther Knecht, Carolyn Lewis-Stone, M.S.W., Jean Marr, Ph.D., John McDonagh, Ph.D., Anne-Marie Meagher, M.D., John Migliaccio, M.Ed., Judith Miller, Ph.D., Raymond Moody, Jr., M.D., Ph.D., Leslee Morabito, Annalee Oaks, R.N., M.A., Ruth Orner, Ph.D., Carol Parrish-Harra, Madelaine Podurgiel, R.N., Ph.D., Laurie Schwartz, Joyce Strom-Paikin, R.N., M.S., Robert Sullivan, Nina Thornburg, M.S.N., Israel Topel, M.D., and Kate Wyatt, Ph.D.