Hemisphere function and vigilance

A vigilance task in which successive signals were presented to one or other hemiretina, and therefore to one or other cerebral hemisphere, revealed no differences between the hemispheres in terms of detections, although detections declined overall during the experimental period. False positive responses also declined, but consistently more arose from the left hemisphere. There was also a difference in the detection of signals received through the nasal and temporal hemiretinae, the temporal hemiretina showing superiority in detection rate throughout the experiment. This finding may provide a new and more economical approach to the tunnel vision phenomenon.     

The Bransford-Franks linear effect: Integration or artifact?

It was hypothesized that the Bransford-Franks linear effect is an artifact of the method of presentation of stimulus sentences and is unrelated to semantic processes. Ss were given sentences containing the same information in one of two ways. In a control condition, which was identical to the procedure used in earlier research, overlapping combinations of ideas were presented during learning and recognition; in an experimental condition, ideas were presented one at a time. Results demonstrated that one-idea sentences received significantly higher recognition confidence ratings in the experimental condition, thus supporting the artifact interpretation. It was proposed that Ss assign recognition confidence ratings based on the probability that a sentence containing a certain number of ideas could have occurred in acquisition.     

Testing message diffusion in harmonic logistic curves

The growth of a population of knowers of a message was studied to test a human interactance hypothesis. The conditions investigated involvedpeople interacting in time, with the population pairing off randomly (i.e., determined by many, small, different influences) and transferring an attribute (i.e., an all-or-none act) at either a steady rate or a waning rate, subsequent to the originating stimulus. The mathematical expressions for these pre-conditions were the differential equations for the linear logistic for steady acting and the harmonic logistic for waning acting. Variant forms of these curves were developed. Two exploratory experiments, or pretests, comprised launching a coffee slogan in a town and imitating a badge wearer in a boys' camp. Since the activity rate waned harmonically in both cases, the harmonic logistic fit best in both the town and the camp as expected by the hypothesis.A paper read before Section K sponsored by the Committee on Social Physics of the AAAS Conference in Boston, December 30, 1953. This research was supported in part by the United States Air Force under Contract AF 33(038)-27522, monitored by the Human Resources Research Institute (now, Officer Education Research Laboratory, Air Force Personnel and Training Research Center), Air Research and Development Command, Maxwell Air Force Base, Alabama. Permission is granted for reproduction, translation, publication and distribution in part and in whole by or for the United States Government.     

The Long-Term Effects of Operation Desert Storm on the Psychological Distress of U.S. Army Reserve and National Guard Veterans1

This study assessed factors related to the long-term psychological health of a sample of U.S. Army National Guard and Reserve Unit veterans who served during Operation Desert Storm (ODS). In the analysis, general distress symptom measures were obtained and comparisons made from soldiers who deployed to Germany, the Persian Gulf region, and throughout the United States, with soldiers who did not deploy. Elevated symptom levels were found for veterans of the Persian Gulf that could not be explained by variance attributed to demographics, or current life stress events. Reported exposure and the degree of current concern due to petrochemical fires in Kuwait were found to be significantly related to elevated symptom measures beyond the effect of combat-zone-related stresses. These findings suggest that a subset of Persian Gulf reserve veterans continue to have elevated levels of distress that are related to oil fire exposure.     

An examination of the new age movement: Who is involved and what constitutes its spirituality

Through substantial new quantitative research, I have found that participants of the New Age Movement are not young and not especially well‐off, but tend to be middle‐aged or older, and are represented throughout the entire economic spectrum. Moreover, their spirituality encompasses a wide variety of influences drawn from all religious traditions and spiritual concerns. While a great deal of social and spiritual common focus seems to exist in the Movement as a whole, my findings show that there is no one specific type of person who might be considered as being particularly active in the New Age. Furthermore, because of the wide variety of spiritual influences and the individual nature of participants’ spiritual quests, there does not appear to be a strong leaning to any one type of spirituality from which a more formalised New Age religious institution might arise. Through this new research, many claims about who is involved in the New Age Movement and what form their spirituality might take have been reviewed and I demonstrate that there are sizeable inaccuracies among the reports of some commentators.     

Effects of Goal Type on Performance,Task Interest,and Affect Over Time1

The purpose of this study was to increase understanding regarding the effects of goal-setting practices on a wide range of dependent variables over time. Goal type (control group, quality goal, quantity goal, and dual goal) was manipulated across 3 time periods. Goal × Time interactions were predicted such that quantity, effort, task interest, and positive affect would initially be low, but by later trials would be higher in the quantity and dual-goal conditions compared to the quality goal and control groups. Quality was expected to be greatest in the quality goal condition and to be relatively constant over time. Participants (N= 80) were undergraduates at a large midwestern university. Results indicated some support for our hypotheses in that Goal × Time interactions were found for quantity produced, rated effort, task interest, and positive affect.     

From auditory image to auditory percept: Facilitation through common processes?

Two experiments explored implicit memory for auditory stimuli as measured by a test of perceptual identification. The facilitative effect of perceived auditory primes was contrasted with that of imaged auditory primes. In Experiment 1, there was a significant priming effect from imaged spoken-word primes that did not differ significantly from the level of priming due to perceived spoken-word primes, measured by a test of auditory perceptual identification. There was no facilitation of spoken-word identification following creation of an image of a word’s referent sound. In Experiment 2, identification of an environmental sound was facilitated by prior processing of an imaged sound from the same category, though there was significantly more transfer following processing of the actual sound.     

"Recipe for a Jury" Revisited: A Balance Theory Prediction

This study examined the relationship of three variables to verdict confidence in an experimental simulation of the jury deliberation process. The three variables were: sex of juror, verdict (guilty or innocent), and the similarity or dissimilarity between juror and confederate verdicts (congruence or incongruence). The subjects were 35 male and 37 female college students. They deliberated in groups containing a male confederate who role-played an obnoxious anti-White or anti-Black juror. Results indicated that before deliberation, male and guilt verdict jurors were more confident than females and innocent verdict jurors. After deliberation, however, sex differences in verdict confidence were absent while innocent verdicts jurors were more confident than guilt verdict jurors. Most important, as predicted from Heider's Balance Theory, males who deliberated with a confederate whose verdict was congruent with theirs' became less confident in their verdicts. Unexpectedly, females became more confident. The study's major hypothesis, then, that it may be advantageous for the defense to accept a juror who zealously advocates a guilty verdict, was only supported for males.     

Visual psychophysics on the APPLE II: Getting started

Several routines are described for psychophysical procedures on the APPLE II. Method of adjustment and PEST routines are presented within short demonstration programs. Techniques for synchronized presentation of images in tachistoscope and motion displays are given, as well as methods for saving graphics images for later recall.