Differential dependence of Pavlovian incentive motivation and instrumental incentive learning processes on dopamine signaling

Here we attempted to clarify the role of dopamine signaling in reward seeking. In Experiment 1, we assessed the effects of the dopamine D(1)/D(2) receptor antagonist flupenthixol (0.5 mg/kg i.p.) on Pavlovian incentive motivation and found that flupenthixol blocked the ability of a conditioned stimulus to enhance both goal approach and instrumental performance (Pavlovian-to-instrumental transfer). In Experiment 2 we assessed the effects of flupenthixol on reward palatability during post-training noncontingent re-exposure to the sucrose reward in either a control 3-h or novel 23-h food-deprived state. Flupenthixol, although effective in blocking the Pavlovian goal approach, was without effect on palatability or the increase in reward palatability induced by the upshift in motivational state. This noncontingent re-exposure provided an opportunity for instrumental incentive learning, the process by which rats encode the value of a reward for use in updating reward-seeking actions. Flupenthixol administered prior to the instrumental incentive learning opportunity did not affect the increase in subsequent off-drug reward-seeking actions induced by that experience. These data suggest that although dopamine signaling is necessary for Pavlovian incentive motivation, it is not necessary for changes in reward experience, or for the instrumental incentive learning process that translates this experience into the incentive value used to drive reward-seeking actions, and provide further evidence that Pavlovian and instrumental incentive learning processes are dissociable.     

Intergenerational practice in the community: A focused ethnographic evaluation

An intergenerational community intervention based on contact theory and using ‘photovoice’ methods was designed to change negative age‐group stereotypes and promote sense of community. A focused ethnographic approach was adopted. Participants were 18 young people and 13 older adults. Data from focus groups, carried out with each generation separately, and observational field notes were analysed using thematic analysis; credibility checks were carried out by auditing and respondent validation. Before the intergenerational intervention, both generations presented age‐group stereotypes and both experienced only a weak sense of community. After the intervention, both generations felt that intergenerational contact had reduced age‐group stereotypes and enhanced recognition of intergenerational similarity; many also articulated a positive sense of community. The intervention has promise for helping young people and older adults to feel more socially included. Copyright © 2011 John Wiley & Sons, Ltd.     

MAXIMALITY,DUPLICATION, AND INTRINSIC VALUE

In this paper, I develop an argument for the thesis that ‘maximality is extrinsic’, on which a whole physical object is not a whole of its kind in virtue of its intrinsic properties. Theodore Sider has a number of arguments that depend on his own simple argument that maximality is extrinsic. However, Peter van Inwagen has an argument in defence of his Duplication Principle that, I will argue, can be extended to show that Sider's simple argument fails. However, van Inwagen's argument fails against a more complex, sophisticated argument that maximality is extrinsic. I use van Inwagen's own commitments to various forms of causation and metaphysical possibility to argue that maximality is indeed extrinsic, although not for the mundane reasons that Sider suggests. I then argue that moral properties are extrinsic properties. Two physically identical things can have different moral properties in a physical world. This argument is a counterexample to a classical ethical supervenience idea (often attributed to G.E. Moore) that if there is identity of physical properties in a physical world, then there is identity in moral properties as well. I argue moral value is ‘border sensitive’ and extrinsic for Kantians, utilitarians, and Aristotelians.     

Positive psychology and war: an oxymoron

The author was deeply disturbed by the January 2011 issue of the American Psychologist, which engendered a series of emotions in the author: first dismay, then anger, and finally a sense of shame about the current state of the profession. This was ostensibly an exposition of "positive psychology" principles and how they are to be applied in a colossal experiment designed to support our military in their fight against the ideology of jihadist Islam. The author found it hard to see what was positive in the presentation. Not one of the authors in this special issue discussed applying positive psychology principles to the reduction of conflict between nations, to the prevention of war, or to the promotion of peace. How about a positive psychology that questions the wisdom of leaders who tell us that the use of force is unavoidable, and seeks instead to help them find alternative, peaceful solutions? A true positive psychology should be primarily addressed to eradicating the disease of war, not to supporting those who fight it.     

Interteaching: the impact of lectures on student performance

Several studies suggest that interteaching improves student learning more than traditional lectures, but few have examined which components of interteaching contribute to its efficacy. We examined whether the lecture component of interteaching affected students' exam grades and cumulative point totals in a research methods course. Although students who received lectures had consistently higher exam scores than students who did not, the differences were statistically significant on only 2 of 5 exams. Students who received lectures, however, earned significantly more points during the semester.     

Getting it right generally,but not precisely: learning the relation between multiple inputs and outputs

In real-world situations, people are often faced with the complex task of deciding which of many potential variables are affecting their own or others’ behavior, as well as noting which specific aspects of behavior are being affected. Although it is common for professionals who encounter such conditions to claim that they acquire accurate and specific knowledge from their experience, it is unclear that such confidence is justified. Using a managerial task, we examined participants’ ability to learn how various interventions affect various aspects of their employees’ performance. The results of three experiments reveal that although participants appear to avoid prescribing an intervention that has a positive effect on a primary performance measure and a negative side effect on a secondary measure, when asked directly about the impact of the intervention, they respond by reducing their judgments of its positive impact. This was true regardless of whether participants indicated clear knowledge of its negative side effect (Experiment 3) or did not (Experiments 1 and 2). Thus, participants appear to be automatically integrating across the effects on different outcome measures.     

Common factors of change in couple therapy

Though it is clear from meta-analytic research that couple therapy works well, it is less clear how couple therapy works. Efforts to attribute change to the unique ingredients of a particular model have consistently turned up short, leading many researchers to suggest that change is due to common factors that run through different treatment approaches and settings. The purpose of this article is to provide an empirically based case for several common factors in couple therapy, and discuss clinical, training, and research implications for a common factors couple therapy paradigm. Critical distinctions between model-driven and common factors paradigms are also discussed, and a moderate common factors approach is proposed as a more useful alternative to an extreme common factors approach.