Probability of reciprocation in repeated prisoner's dilemma games

Both social cooperation and self‐control require reciprocation. In social cooperation situations a single person's cooperative act, if not reciprocated by others, would be unreinforced both immediately and in the long term. Similarly, a single act of self‐control (refusing a single cigarette, for example), if not followed up by other such acts, would also be unreinforced immediately and in the long term. The present experiments varied probability of reciprocation in a prisoner's dilemma‐like game that could resemble a social cooperation or a self‐control situation. Participants earned points by playing against a computer. The computer offered the participant a choice between 5 or 6 points (‘cooperation’ by the computer) or between 1 or 2 points (‘defection’ by the computer). The participant's choice of the lesser alternative (‘cooperation’) or the greater alternative (‘defection’) on the current trial led, respectively, to cooperation or defection by the computer on the next trial with a probability (probability of reciprocation, PR) which could vary. When PR was greater than 63%, consistent cooperation maximized the participant's earnings. When PR was less than 63%, defection maximized earnings. Three conditions were studied: PR signaled by spinners; PR unsignaled; PR unsignaled with participants believing that they were playing with another person, not the computer. With PR = 100% (‘tit‐for‐tat’) and PR = 50%, the modal participant maximized earnings under all three conditions. With PR = 75%, participants maximized earnings only when PR was signaled. These results indicate that differences between people's tendency to cooperate with other people (social cooperation) and their tendency to cooperate with their own future interests (self‐control) may lie in differences in subjective PR. Copyright © 2001 John Wiley & Sons, Ltd.     

How accurately can older adults evaluate the quality of their text recall? The effect of providing standards on judgment accuracy

Adults have difficulties accurately judging how well they have learned text materials; unfortunately, such low levels of accuracy may obscure age‐related deficits. Higher levels of accuracy have been obtained when younger adults make postdictions about which test questions they answered correctly. Accordingly, we focus on the accuracy of postdictive judgments to evaluate whether age deficits would emerge with higher levels of accuracy and whether people's postdictive accuracy would benefit from providing an appropriate standard of evaluation. Participants read texts with definitions embedded in them, attempted to recall each definition, and then made a postdictive judgment about the quality of their recall. When making these judgments, participants either received no standard or were presented the correct definition as a standard for evaluation. Age‐related equivalence was found in the relative accuracy of these term‐specific judgments, and older adults' absolute accuracy benefited from providing standards to the same degree as did younger adults. Copyright © 2009 John Wiley & Sons, Ltd.     

Federal Funds to Train Clinical Psychologists for Work with Underserved Populations: The Bureau of Health Professions Graduate Psychology Education Grants Program

This paper describes the Bureau of Health Professions (BHPr) Graduate Psychology Education program (GPE), which supports projects that train health service psychologists for work with underserved populations. BHPr history and funding criteria are discussed, as are those of BHPr's parent organization, the Health Resources Service Administration. BHPr objectives and methods for support of clinical psychology training parallel those that BHPr has used to support training in other heath professions. The paper also describes three psychology internship training programs in academic medical settings that competed successfully for BHPr GPE funding in 2002. The three training projects differ significantly in training rotation sites, target populations with which trainees work, and the other health care professions that partner with psychology in interdisciplinary training—but they are similar in that each project provides an example of a program that effectively satisfied BHPr criteria for expanding psychology's scope of practice with underserved populations.     

Child Saving and the Emergence of Vocational Psychology

Vocational psychology emerged at the beginning of the 20th in a context of social and political change known as the “progressive era.” A popular progressive theme was “child saving,” a movement that expressed concern for the physical, educational, emotional, and social well-being of children and adolescents. Vocational guidance was one manifestation of this and served as the foundation for the emergence first of vocational psychology and later of counseling psychology. The concern for and care of youth was gradually replaced by the professionalization of psychology that over time has changed the focus and direction of vocational psychology.     

Short mindfulness meditation training: does it really reduce perceived stress?

Cognitive Processing - To study whether an 8-week mindfulness meditation training program truly reduces perceived stress without designing a stress reduction program. An experimental study was...     

Medical Psychology in Australia

Medical psychology in Australia is heavily influenced by British and American thought. The dominant model for clinical training and practice is the scientist–practitioner model, yet a gulf exists between academic and practice settings. Membership of the professional society requires 6 years of university study in psychology. However, registration requires only 4 years training in psychology. Medical psychologists provide a broad range of services in hospital and community settings, often within multidisciplinary teams. Challenges for the future include bridging the divide between university and health settings, increasing qualifications required for registration, making psychology culturally relevant, and demonstrating to funding managers that psychological interventions are both clinically effective and cost effective.     

Evaluating information for truthfulness: The effects of logical subordination

Research has shown that many individuals do not routinely evaluate new information for consistency with respect to what they already know. One factor that may affect the likelihood of critical evaluation is whether or not the information is the central focus of the message. Two experiments tested this possibility by establishing differential emphasis of false information within complex sentences. Half of the target sentences contained a false fact in the main clause and half contained a false fact in the subordinate clause. In Experiment 1 subjects verified 64 sentences presented orally as either true or false. In Experiment 2 subjects read and evaluated 20 paragraphs for the presence of false information. As expected, subjects were less likely to report the false information when it was conveyed as logically subordinate rather than central. The results suggest one explanation for deficits in comprehension monitoring and have implications for understanding susceptibility to persuasive communications.