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51.
Gerald E. Larson 《Attention, perception & psychophysics》1996,58(1):153-159
Previous studies comparing performance on standard (i.e., static) and dynamic spatial test items have concluded that the two item types measure different abilities. Such conclusions about the uniqueness of static and dynamic spatial abilities seem premature, however, since only a limited number of dynamic spatial tasks have been utilized in research and these have differed markedly from their static counterparts. In the present studies, tasks were designed to require a common mental operation (mental rotation) under static and dynamic conditions. Correlations between static and dynamic performance ranged from .80 to .90. This appears to suggest that the emergence of a unique dynamic ability factor depends on the utilization of certain specialized tasks (e.g., arrival time tasks) with mental operations much different than those required by conventional spatial tests. In other words, it is apparently the requirement for different cognitive processes and not the processing of stimulus motion per se that distinguishes performance onsome dynamic tasks from performance on some standard static tasks. 相似文献
52.
Trust and Missed Opportunities in International Relations 总被引:2,自引:0,他引:2
Deborah Welch Larson 《Political psychology》1997,18(3):701-734
With the end of the Cold War, we must wonder whether there were missed opportunities to regulate the arms race and global competition, which nearly bankrupted the United States and contributed to the collapse of the Soviet Union. A missed opportunity for agreement is a situation where there was at least one alternative that the parties to a conflict preferred or would have preferred to nonagreement. Hard-core Realists argue that states compete for territory, arms, and influence because they have conflicting national interests. Soft-core Realists maintain that such conflicts are effects of international anarchy and uncertainty, and that states can cooperate contingent on reciprocity. I argue that states often fail to cooperate even when they have compatible preferences because policy-makers make incorrect inferences about the opponent's motives and intentions, a process that can be illuminated by social psychology. I present three alternative explanations of trust and distrust in international relations—rational choice, domestic structures, and social psychology. If policy-makers are prudent, they will assess the other's interests in observing an agreement as well as its reputation. Often, domestic political structures encourage leaders to promote distrust of an external enemy to legitimize their internal rule or foreign policy. Finally, distrust may lead policy-makers to dismiss the other side's cooperative signals or proposals. Distrust can be overcome by making a series of step-by-step agreements in which each side can test the other's good faith at limited cost, or through unilateral concessions as part of a consistent policy. 相似文献
53.
The current study was conducted to determine the potential relationship between stress-induced corticosterone secretion and corticosteroid receptor mRNA levels after 5 days of intermittent stress. In particular, we were interested in the rate at which animals terminate a stress response, and how this termination may be altered by repeated stress. Adult male Sprague-Dawley rats were subjected to either 5 days of restraint stress or 5 days of an unpredictable stress paradigm. Restraint-stress induced corticosterone secretion was measured on Days 1 and 5 in both groups, and animals were killed on Day 6. Glucocorticoid receptor (GR), and mineralocorticoid (MR) mRNA levels were determined using in-situ hybridization techniques. Five days of restraint stress caused an habituation of the plasma corticosterone response to stress measured 60 and 90 min post-stress initiation; this pattern of corticosterone secretion was not observed in the animals subjected to unpredictable stress. Five days of either stress paradigm did not alter MR mRNA levels measured within the hippocampus or GR mRNA levels within the hippocampus or the medial parvocellular division of the paraventricular nucleus of the hypothalamus (mpPVN). However, an individual's GR mRNA levels measured within the CA1/2 region of the hippocampus and the mpPVN were significantly correlated with the degree of habituation of the corticosterone response to stress measured on Day 5. This suggests that an increase in the rate of termination of the stress response and levels of GR within the hippocampus and mpPVN may be functionally related. 相似文献
54.
This study of naturally occurring behaviour employed a "beeper technique" to investigate the actions carried out by 152 subjects in eight different groups, viz. adult students, employed students who were also parents, unemployed, art students, doctoral students, alcoholics, retired people and a control group. Actions were sampled for seven subsequent days, five times per day between 8 a.m. and 10 p.m. at randomly selected occasions. Each action was rated on a number of variables, shortly after it was sampled (median delay approximately 10 min). Some of the findings were: Time allocation corresponded well with national estimates. Being under situational control was highly aversive. Instrumental and consummatory orientations correlated positively. The background variables were, on the whole, only rather weakly related to action ratings, but it was found that women and retired persons tended to report a higher level of well-being. 相似文献
55.
Charles C. Larson 《Journal of School Psychology》1976,14(3):253-254
Describes the extinction of the demanding behaviors of a nine-year-old boy by placing the responsibility for behavioral reinforcement directly under his own control. The therapist assumed that the behavioral pattern of the paranoid personality is characterized by an overdependence upon environmental reinforcers and therefore used the self-management technique, allowing the student the opportunity to gain independence from his classroom environment while meeting his need for positive feedback. 相似文献
56.
Dr. Reed W. Larson 《Motivation and emotion》1987,11(2):145-156
This research investigates the hypothesis that the rates of positive and negative affect in a person's life are independent. Whereas prior research on this issue has relied upon people's recollections, a source of information subject to distortion, this research employs reports obtained from immediate experience. Members of an adolescent and an adult sample carried electronic pagers for 1 week and filled out reports on their immediate affective states upon receipt of signals sent to them at random times. The frequencies of positive and negative affective states for each person were then computed from this pool of time samples. The findings reveal strong internal consistency in each person's rates of positive and negative affect. However, congruent with the independence hypothesis, these frequency rates of positive and negative affect were not correlated with each other. The findings dispel the possibility that the results of prior research were affected by distortions of recollection, and they suggest that the occurrence of positive and negative affect in a person's life are independent, not only from week to week, but also from day to day and hour to hour.This research was carried out with support from the Psychiatric Research Fund of Michael Reese Hospital and Medical Center. The author wishes to express his appreciation to Norman Bradburn, Mark Freeman, Nancy Bradney, Randy Larsen, and Ed Diener for comments on an earlier draft of this paper. The author is indebted to Mihaly Csikszentmihalyi and Ronald Graef for use of the data from the adult sample. 相似文献
57.
David B. Larson M.D. M.S.P.H. Harold G. Koenig M.D. professor Berton H. Kaplan Ph.D. Raymond S. Greenberg M.D. Ph.D. Everett Logue Ph.D. professor Herman A. Tyroler M.D. 《Journal of religion and health》1989,28(4):265-278
Most clinical studies examining the relation between religion and blood pressure status have focused on church attendance, finding lower pressures among frequent attenders. The present study examines the effect on blood pressure status of a religious meaning variable, importance of religion, both by itself and together with frequency of church attendance. The relation between blood pressure, self-perceived importance of religion, and frequency of church attendance was examined among a rural sample of 407 white men free from hypertension or cardiovascular disease. The data confirmed an interaction between the effects of both religious variables on blood pressure status, with importance of religion having an even greater association with lower pressures than church attendance. Diastolic blood pressures of persons with high church attendance and high religious importance were significantly lower than those in the low attendance, low importance group. These differences persisted after adjusting the analyses for age, socioeconomic status, smoking, and weight-height ratio (Quetelet Index). The difference in mean diastolic pressures based on response to the religious importance variable alone was statistically and clinically significant, particularly among men aged 55 and over (6 mm) and among smokers (5 mm). These findings suggest that both religious attitudes and involvement may interact favorably in their effects on cardiovascular hemodynamics. 相似文献
58.
Larson LD Schnelle JF Kirchner R Carr AF Domash M Risley TR 《Journal of applied behavior analysis》1980,13(4):571-581
Tachograph recorders were installed in 224 vehicles of a metropolitan police department to monitor vehicle operation in an attempt to reduce the rate of accidents. Police sergeants reviewed each tachograph chart and provided feedback to officers regarding their driving performance. Reliability checks and additional feedback procedures were implemented so that upper level supervisors monitored and controlled the performance of field sergeants. The tachograph intervention and components of the feedback system nearly eliminated personal injury accidents and sharply reduced accidents caused by officer negligence. A cost-benefit analysis revealed that the savings in vehicle repair and injury claims outweighed the equipment and operating costs. 相似文献
59.
60.
Alan S. DeWolfe Jacquelyn K. Larson Joseph J. Ryan 《Journal of psychopathology and behavioral assessment》1985,7(3):185-189
The diagnostic accuracy of the Millon Clinical Multiaxial Inventory (MCMI) computer reports was assessed for the sample of 48 patients reliably identified as having bipolar affective disorder. Only 13 of the 48 reports were accurate in classifying the patients as having bipolar affective disorder, and this was significantly (p < .01) less than 50% of the cases. The diagnostic accuracy clearly left much to be desired. Additional research is needed to assess the validity of MCMI diagnostic suggestions for other patient groups. 相似文献