Assessing relations between imagery and perception

Direct comparisons between perceptual performance and reports made under imagery instructions are uninterpretable except in cases where (a) the perceptual phenomenon is well understood and (b) experimental constraints are sufficient to establish imagery causally in the effect. Neither condition seems to be satisfied in Finke and Kurtzman's article. Furthermore, if imagery is an internal medium conceived in introspective terms, the second condition can never be met because the medium is not accessible to operational definition. Perhaps the basic problem with this research is that the instructions used to create conditions in imagery experiments do not qualify as operational definitions. Reports of successful compliance with imagery instructions are logically equivalent to introspective reports.     

The effects of perceived similarity upon the use of reward and punishment

Subjects were led to perceive a trainee as either similar or dissimilar to themselves. During subsequent influence trials, subjects attempted to assess the causes of the trainee's performance and to employ rewards, punishments, or manipulations of the trainee's environment to optimize her performance. It was predicted that subjects would perceive the performance of dissimilar trainees as caused more by the dispositional factor of motivation than the performance of similar trainees, and that dissimilar trainees would thus be rewarded more upon success as well as punished more upon failure. The hypotheses were supported, and a model of reward-punishment behavior and attribution is discussed.     

Resistance to punishment as a function of intensity and frequency of prior punishment experience

Rats with a history of intermittent punishment have been found to persist in the face of continuous punishment. It was predicted from an extension of frustration theory to punishment that increasing the intensity or frequency of intermittent punishment would increase persistence to high fear elicited by continuous punishment. Two experiments, employing 310 rats, verified this prediction for both intensity and frequency manipulations but indicated rather narrow boundary conditions for their effects.     

The influence of hardiness on the relationship between stressors and psychosomatic symptomatology

Thirty male and 58 female students responded to questionnaires based on a 9-month period in a prospective study of the impact of hardiness, life events, and hassles on reports of somatic symptoms. The data were analyzed utilizing cross-lagged panel analyses, analyses of variance, and multiple regression analyses. The results suggested that life events, hassles, and symptoms were significantly related in a recursive, mutually interactive manner. Although life events shared a high degree of variance with hassles, hassles consistently contributed above and beyond life events in predicting somatic symptoms. In addition, hardiness tended to have additive and opposite effects to that of stressors in its impact on symptomatology. Finally, and perhaps most important, compared to lower-hardy individuals, those higher in hardiness tended to experience less frequent stressors and to perceive the minor events they did experience as less stressful.     

Effects of pre- and postpubertal social experience on sexual and social behavior in male and female brown lemmings (Lemmus sibiricus)

The effects of prepubertal social contact and postpubertal mating experience on sexual behavior were examined in male and female brown lemmings (Lemmus sibiricus). Subjects of both sexes were either isolated at weaning (18 days) or then housed with siblings for another 10 days before being isolated. Before testing for sexual behavior at the age of 75 days, half of each group of males received a series of exposures to estrous females and half of each group of females was housed with a stud male. The results of mating tests indicated that whereas prior sexual experience facilitated subsequent copulatory behavior in both sexes, prepubertal interactions subsequently facilitated contact social and sexual behavior in males but did not increase the behavioral scores of females, which engaged in high levels of sexual behavior regardless of prepubertal experience. The effect of prior copulatory activity on male sexual performance could not be attributed to increasing age (i.e., maturational processes) because the behavior of males tested once but at different ages did not differ appreciably. Prepubertal social interaction appeared to predispose males to benefit from sexual experience later in life.     

Self-Defeating Behavior Workshops: Systems Approach for Hard-to-Serve Veterans

For the past two and one-half years, the self-defeating behavior (SDB) theory has been applied to a population of veterans who had a history of problems in job training, vocational placement, and academic settings. A group-therapy structure meeting eight times during a four-week period is the basic approach of the SDB seminar. In conjunction with the SDB seminar, a variety of support people and agencies have combined efforts to develop a systems approach to helping the veterans eliminate behaviors that are self-defeating. Results from the systems approach have been excellent.     

Figural goodness effects in perception and memory

There is an apparent contradiction concerning configurational effects in visual information processing. Some studies have shown that when an array is organized into a “good” or unitary Gestalt, analysis of a single part of it is facilitated, while others have shown “good” arrays to impede search for a part. The three experiments reported here support the proposition that goodness of form can facilitate performance when memory is used, but that goodness impairs strictly perceptual search for a part of an array. These experiments compare detection of a single feature in faces (unitary figures) and nonfaces. They show that when the face or nonface is presented before the target feature (and must be held in memory), performance is better for faces than for nonfaces. When the target is presented before the face or nonface and perceptual search is required, faces give worse performance than nonfaces. Implications for perceptual phenomena, including the object-superiority and word-superiority effects, are discussed.     

Asymmetry of visual interference

This research studies lateral interference among items in the visual field under conditions in which central cognitive factors such as attention and memory limitations are eliminated or controlled for. Under these conditions lateral masking is still found, and it is still asymmetrical (peripheral items interfere with recognition of central items more than central with peripheral). These experiments therefore add to the evidence that both lateral interference and the asymmetry of interference have a component that does not result from cognitive strategies. The experiments also add to the evidence that the asymmetry effect at the sensory level can be attributed to the falloff in acuity from the center to the periphery of the retina, since the mean eccentricity of the target-mask cluster is more peripheral with a peripheral mask than with a central mask. The hypothesis is advanced that the asymmetry effect, as well as lateral interference itself, at the sensory level results from the grouping of target and mask into a single Gestalt-like configuration. The final experiment in the series supports this hypothesis     

Position effects in comparative judgments of serial order: List structure vs. differential strength

Two experiments are reported that test the hypothesis that the serial position effect in comparative judgment of ordinal position in arbitrary serial lists results from differential memory or associative strength among list items. The serial position effect in comparative judgment is typically a pattern in which pairs that contain a term from one of the two extremes of the list are processed faster and more accurately than pairs that contain no end terms. The experiments show that a new term added to either the end or the middle of a well-practiced fourterm series behaves almost immediately like the end or central term, respectively, of a well-practiced five-term series. Furthermore, when the added term is removed, the list reverts immediately to the position effect obtained in a four-term series. Theories that explain the position effect by differential build-up of item strength or of interitem associative strength over practice cannot explain these effects. We propose instead that learning of a serial list is accomplished by assigning list members to positions in a general-purpose linear order schema and that subjects can make these assignments rapidly and flexibly.