Every reinforcer counts: reinforcer magnitude and local preference

Six pigeons were trained on concurrent variable-interval schedules. Sessions consisted of seven components, each lasting 10 reinforcers, with the conditions of reinforcement differing between components. The component sequence was randomly selected without replacement. In Experiment 1, the concurrent-schedule reinforcer ratios in components were all equal to 1.0, but across components reinforcer-magnitude ratios varied from 1:7 through 7:1. Three different overall reinforcer rates were arranged across conditions. In Experiment 2, the reinforcer-rate ratios varied across components from 27:1 to 1:27, and the reinforcer-magnitude ratios for each alternative were changed across conditions from 1:7 to 7:1. The results of Experiment 1 replicated the results for changing reinforcer-rate ratios across components reported by Davison and Baum (2000, 2002): Sensitivity to reinforcer-magnitude ratios increased with increasing numbers of reinforcers in components. Sensitivity to magnitude ratio, however, fell short of sensitivity to reinforcer-rate ratio. The degree of carryover from component to component depended on the reinforcer rate. Larger reinforcers produced larger and longer postreinforcer preference pulses than did smaller reinforcers. Similar results were found in Experiment 2, except that sensitivity to reinforcer magnitude was considerably higher and was greater for magnitudes that differed more from one another. Visit durations following reinforcers measured either as number of responses emitted or time spent responding before a changeover were longer following larger than following smaller reinforcers, and were longer following sequences of same reinforcers than following other sequences. The results add to the growing body of research that informs model building at local levels.     

Inference suppression and semantic memory retrieval: Every counterexample counts

Reasoning with conditionals involving causal content is known to be affected by retrieval of counterexamples from semantic memory. In this study we examined the characteristics of this search process in everyday conditional reasoning. In Experiment 1 we manipulated the number (zero to four) of explicitly presented counterexamples (alternative causes or disabling conditions) for causal conditionals. In Experiment 2, using a generation pretest, we measured the number of counterexamples participants could retrieve for a set of causal conditionals. One month after the pretest, participants were presented a reasoning task with the same conditionals. The experiments indicated that acceptance of modus ponens linearly decreased with every additionally retrieved disabler, whereas affirmation of the consequent acceptance linearly decreased as a function of the number of retrieved alternatives. Results for denial of the antecedent and modus tollens were less clear. The findings show that the search process does not necessarily stop after retrieval of a single counterexample and that every additional counterexample has an impact on the inference acceptance.     

Every moment counts: smooth transitions of object boundaries reflect constant updating in object-based attention

Detection of a target is faster when it is presented on an attended rather than an unattended object (i.e., object-based attention). Using the double-rectangle cuing paradigm (Egly, Driver, & Rafal, 1994), we previously showed that object-based attention operates on a dynamic representation: Object-based attentional guidance is affected by subsequent changes occurring to an attended object (Lin & Yeh, 2011). The present study provides further support for our dynamic-updating hypothesis, demonstrating that changes are indeed updated into the existing object representation. After a cue display, we introduced changes between the initial display (four hashes) and the final display (four squares with an occluder between them). We found object-based attention only with smooth transitions between the initial and final displays, not when transitions were in the reverse order (Exp. 1) or contained any single disruption of the smooth transition (Exp. 2). These results confirm our hypothesis that attention operates on a dynamic object representation that is constantly and continuously updated.     

Every Breath You Take,Every Move You Make

Slow Reckoning: The Ecology of a Divided Planet by Tom Athanasiou, published by Seeker &; Warburg, London, 1997, 385 pp., £12.99 (published in the United States as Divided Planet: The Ecology of Rich and Poor, by Little, Brown &; Company, New York, 1996, $25).     

Death on Every Weekend

This essay is a personal account of situations experienced by a medical technician in a large emergency room. It includes examples of stressful situations that daily confront medical personnel and the inability of medical institutions to aid them in understanding and coping with death and dying. Stemming from these stressful situations, the paper illustrates the importance of the need for medical institutions to pay direct attention to the stressful topic of death itself if the medical personnel are to work efficiently in an environment where death and dying are everyday occurrences. Although some institutions do offer in-service sessions to nurses, these services are far and few between. But the stress for all medical personnel remains high, and there remains an unfulfilled need to teach effective thanatological techniques to all medical personnel.     

Every Dogma has its day

This paper is a reexamination of Two Dogmas in the light of Quine's ongoing debate with Carnap over analyticity. It shows, first, that analytic is a technical term within Carnap's epistemology. As such it is intelligible, and Carnap's position can meet Quine's objections. Second, it shows that the core of Quine's objection is that he (Quine) has an alternative epistemology to advance, one which appears to make no room for analyticity. Finally, the paper shows that Quine's alternative epistemology is itself open to very serious objections. Quine is not thereby refuted, but neither can Carnap's analyticity be dismissed as dogma.     

形形色色的算命迷信

最近,收到一位不到20岁的海外学子的来信,信中说他带着从小的梦想和满腔的热情到国外攻读学位,但意外的看了"好易通"上的八字命评,说是什么"此人般般事不成,得来即是去之时",自此精神上受到了打击,生活和学习都摆脱不了这个迷信的阴影,十分苦恼,希望得到帮助.     

Why Every Theory of Luck is Wrong

There are three theories of luck in the literature, each of which tends to appeal to philosophers pursuing different concerns. These are the probability, modal, and control views. I will argue that all three theories are irreparably defective; not only are there counterexamples to each of the three theories of luck, but there are three previously undiscussed classes of counterexamples against them. These are the problems of lucky necessities, skillful luck, and diachronic luck. I conclude that a serious reevaluation of the role of luck in philosophy is called for.     

Every world can see a reflexive world

Let be the class of frames satisfying the condition

Every Clinical Social Worker Is in Post-Adoption Practice

No abstract available for this article.     

Italian Adagio: Every Law has Its Loophole

Science and Engineering Ethics - The Italian law of December 2010 establishes new criteria and parameters for the evaluation of faculty members. The parameters are represented by the number of...     

Southeast Asian immigrants' perceptions of good adolescents and good parents

The authors examined the extent to which Southeast Asian immigrant parents and adolescents agree on what it means to be a "good" parent and a "good" adolescent. Thirty-six parents and 37 adolescents of Cambodian, Hmong, Lao, and Vietnamese descent participated in a series of focus groups. Content analyses of their discussions showed that good adolescents were obedient, helpful around the house, and respectful to parents and elders, and good parents were those who provide for, nurture, and monitor children's activities. The findings suggest that ideas about good parents and good adolescents are influenced by both the parents' traditions and by adolescents' acculturation to American values.     

The good guys

Journal of Contemporary Psychotherapy -