Perceptual learning in visual category acquisition

The attribute structure of a set of dot patterns was studied by having subjects segment (parse) the dots of each pattern into parts or subunits by drawing circles around groups of dots from each pattern. These parsing data were obtained for subjects who had no prior experience with the patterns and for subjects who had previously learned to identify the patterns as members of one of four categories. Analyses of the parsing data indicated that category learning increased the salience of large subunits that were similar in orientation for patterns that were members of the same category. This evidence for perceptual learning was obtained even when the category training procedure required learning to identify the patterns individually, suggesting that attribute abstraction and item learning are not incompatible. It was also obtained without an increase in overall intersubject agreement. The latter result led us to question the usefulness of intersubject agreement as an index of category knowledge.     

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.     

Eyes to see and ears to hear: Identifying religious experience in pastoral spiritual guidance

Elizabeth Liebert is Director of The Program in Christian Spirituality at San Francisco Theological Seminary.     

Effects of auditory masking on lingual vibrotactile magnitude-estimation scaling responses of young children

Studies of lingual vibrotactile magnitude-estimation scaling have focused primarily on the responses of normal young adults. Little is known about the scaling responses of young children to suprathreshold vibratory stimulation because of the complexities of the experimental procedure. Binaural auditory masking is one aspect of the procedure that has recently been studied in adults. The purpose of this study was to investigate the effects of binaural auditory masking on lingual vibrotactile magnitude-estimation responses of young children. Four children whose mean age was 4.6 yr. completed magnitude-estimation scaling tasks for eight lingual vibrotactile suprathreshold intensity levels (6, 10, 16, 20, 26, 30, 36, 40 dB SL) under masking and no masking conditions. Results suggest possible effects of auditory masking on the lingual vibrotactile magnitude-estimation scaling responses of these young children that have not been found for such responses of adults.     

Adapting to an irrelevant item in an immediate recall task

Recall of the last one or two items of a spoken list is impaired when the list is followed by a nominally irrelevant item. At issue here was whether this suffix effect is reduced with repeated exposure to the irrelevant item. The effect was found to decline over successive blocks of trials, but only slightly (Experiment 1). No decisive evidence for adaptation to the irrelevant item was found when it was spoken after each of the list items rather than after the last one only (Experiments 2 and 3). The strongest evidence for adaptation was obtained when the irrelevant item was repeated in an unbroken stream that extended through the presentations and recall periods of successive lists: The recency effect and the level of recall at the last position within a list were greater under these conditions than when the irrelevant item was presented only once after each list (Experiments 4, 5, and 6).     

A method for calibrating an eye-monitoring system for use with infants

An algorithm for calibrating data from an infrared corneal reflection eye movement monitor is described. The algorithm is designed for use with infants and other noninstructable subjects.