Improving retrieval

The present research investigated whether ability for retrieval might be improved by practice at retrieval. Retrieval practice trials, each of 10 min duration, required subjects to attempt to recall as many examples as possible of a designated category. Two kinds of practice were investigated. Subjects given general practice attempted to recall a different category on each successive practice trial. Subjects given specific practice attempted to recall the same category on each successive practice trial. General practice had a negligible effect on recall, even when subjects practised daily for over a month. In contrast, specific practice substantially improved recall, facilitating retrieval of 50 to 100 per cent of all the example subjects known for a category.     

Materials for an analysis of a just universe

There is one assumption that is shared by practically all popular religious and philosophic systems, ancient and modern, Eastern and Western. In truth it may well be that it is this single assumption which makes such ‘systems’ possible. That shared assumption is the belief in a ‘just universe’, i.e. ‘just’ in the sense of morally ordered, morally predictable and morally explainable. This assumption rests, as most assumptions must, on pragmatic grounds; that is to say, the assumption is retained or used because it gets the users where they want to go, i.e. the assumption works. But if it could be shown that this assumption, aside from being useful, leads to insuperable logical or empirical problems, then this might be prima facie grounds for rejecting the assumption. Part I examines the historical roots of the assumption of a just universe. Part II, examines three implications that would seem to follow from the assumption that the universe, the world, is a just place in which to live. Part III explores the unacceptable consequences that are found in and that follow from these three implications and that necessitate the rejection of the assumption of the just universe of Part I.     

Detection of temporal order of noise-like luminance functions

We study the capacities of human observers to time order light sources that emit dynamic noise, identical for the different light sources, except for an adjustable delay. There is a range of temporal delays for which human observers are perfectly able to perform this task, using the direction of the motion percept that is evoked by the stimulus as a cue. An optimal delay between light sources at which the observers are most robust against any deterioration of the stimulus is defined. We claim that optimal delays (15–25 msec) correspond to the time delay of a putative Reichardt correlation mechanism in human motion vision. Contrary to the ability of human observers to sense temporal correlations in noise sequences, observers are totally unable to detect anticorrelation between noise sequences. This inability rules out motion opponency as a viable model for human front-end (“early”) motion vision.     

Self-Awareness, Task Failure, and Disinhibition: How Attentional Focus Affects Eating

ABSTRACT Dieting and nondieting subjects were given either failure or neutral performance feedback on a problem-solving task. Failure subjects were then assigned to one of three self-awareness conditions: One group was forced to watch a video clip of themselves failing on the problem-solving task, one group was asked to watch a distracting video clip on bighorn sheep, and the final group was asked to sit quietly for 10 minutes. Subjects were then allowed to eat as much ice cream as they wanted. Only in those conditions which allowed—or promoted—low self-awareness (the failure/distraction and simple failure condition) did dieters show disinhibited eating. In the failure/videotape condition, which enforced high levels of self-awareness, eating in dieters remained inhibited. This supports the proposal that a reduction in self-awareness is necessary for lifting of inhibitions. Eating in nondieters was reduced in the failure/videotape and simple failure conditions, possibly because of the autonomic correlates of distress.     

Restraint, weight loss, and variability of body weight

Restrained and unrestrained subjects (n = 24) were weighed daily for a 6-week period and again 6 months later in order to determine whether dietary restraint or relative body weight is the better predictor of weight variability. Restraint was a significantly better predictor of naturally occurring weight fluctuations than was relative body weight. Furthermore, the 2 factors of the Restraint Scale, Concern for Dieting and Weight Fluctuations, were both significant predictors of weight variability. We propose that exaggerated weight fluctuations are not a natural concomitant of higher body weight but possibly the consequence of a cycle of dieting and overeating, which seems to preclude actual weight loss.     

Children's cognitive maps of large-scale spaces: Effects of exploration,direction, and repeated experience

Kindergarteners and third graders (mean ages 5–10 and 8–9 years) repeatedly encountered a model town and then constructed the town from memory. In Experiment 1, the effect of different types of exploration on the development of a cognitive map was assessed. Children who were directed to walk within the town placed buildings more accurately than children who had walked along the town's perimeter. Children who walked within the town and were directed to the spatial relationships among buildings had the highest placement accuracy. Third graders were more accurate than kindergarteners across the three types of exploration. In Experiment 2, children were permitted to explore the town alone for an unlimited amount of time. Under these conditions, third graders still placed buildings more accurately than kindergarteners. A comparison of Experiments 1 and 2 indicated that children developed more accurate cognitive maps when motor activity and attention were directed by the experimenter as opposed to being directed by the child. Accuracy improved with repeated walks and constructions in both experiments, and the results of Experiment 3 suggested that constructing facilitated the development of the cognitive map as much as walking. It was concluded that third graders' cognitive maps were more accurate than kindergarteners' maps due to differences in the speed of acquisition and storage of spatial information.     

Lack of acknowledgment in the family Rorschachs of families with a child at risk for schizophrenia.

Lack of acknowledgment, a characteristic of the direct interactions of families of schizophrenics, was found also to characterize the Family Rorschach interactions of families whose disturbed, non-psychotic adolescents were assessed at high risk for schizophrenia on the basis of parental communication deviance. The same high-risk families had unbalanced interaction patterns as reflected in three measures of family structure.     

Clogs in the bogus pipeline: Demand characteristics and social desirability

Jones and Sigall (1971) have advocated the use of a pseudophysiological monitoring device (the bogus pipeline) as a procedure to measure the “true” feelings of experimental subjects. A comparison of the bogus pipeline and a paper-and-pencil scale as measures of attraction indicated that the monitoring device is affected by experimenter demands among high social desirability (SD) subjects (p < .03) while the simple rating scale is not. Attraction to a stranger was determined solely by attitude similarity for high SD subjects using the paper-and-pencil measure and for low SD subjects in both measurement conditions. Use of the bogus pipeline in the typical attraction experiment thus would seem to be contraindicated. These results were discussed with respect to Ostrom's (1973) criteria of relative sensitivity and functional comparability of measurement techniques.     

Effects of expectancy and order of report on auditory asymmetries

This study examined the relation between selective attention, perception, and memory factors in the generation of auditory asymmetries. Sixty subjects were randomly assigned to one of three dichotic listening groups. One group was presented with paired linguistic stimuli, a second group with dichotic nonverbal material, while a third group heard randomly inteterspersed verbal and nonverbal pairs. Order of ear report was controlled in all three groups. Significant right ear advantages on first and second reports were found in the verbal group, and a similar pattern of left ear advantages was found in the nonverbal group. This ear by material dissociation was only found on second ear reports in the group which heard the randomly interspersed pairs. No first report ear advantages were evident in the latter group. These results are discussed in terms of the independence of perceptual and memory mechanisms in the production of auditory asymmetries.