Positive conditioned suppression: an explanation in terms of multiple and concurrent schedules

Rats performed under a baseline variable-interval schedule of food presentation. A response-independent food schedule was then superimposed on the baseline schedule for different periods of time across different conditions. The response-independent schedule operated for the whole session in some conditions, intermittently for sixty second periods in some, and intermittently for ten-second periods in others. Under these latter two sets of conditions, the response-independent food schedule was stimulus correlated and alternated with the baseline schedule according to a multiple schedule. Response-independent food presentations always suppressed responding. The degree of suppression tended to increase the longer the period of response-independent food. Control conditions, in which the superimposed schedule was response-dependent, rather than response-independent, did not produce response suppression. The results fit an analysis of positive conditioned suppression phenomena in the context of multiple and concurrent schedule effects.     

Single, but not multiple pairings of sucrose and corticosterone enhance memory for sucrose drinking and amplify remote reward relativity effects

This study tested whether pre-training pairings of ingestion of a 32% sucrose solution and injection(s) of corticosterone (B) would enhance later ingestion in the absence of B, and whether these effects would carry over into later contrast-like effects when animals were subsequently shifted to 4% sucrose. Frequency-dependence of these pairings was also examined. Three groups of male Sprague-Dawley rats were adrenalectomized (ADX). A fourth group was sham ADX. Each ADX group received three presentations of sucrose and B (666 microg/kg, s.c.). One received unpaired presentations (separated by days), one received two unpaired presentations and one paired (i.e., simultaneous) presentation, and one received three paired presentations. Shams received three sucrose presentations paired with saline. Single, but not multiple pairings of B with ingestion of a 32% sucrose solution enhanced later sucrose ingestion, a memorial-like effect that carried over into later, opposite contrast-like effects upon presentation of a less-preferred 4% sucrose solution. These effects could not be easily ascribed to differences in training, other than the pairing regimen itself, nor to motivational differences at the time of testing, and were presumed to be memorial. The pairing and frequency-dependence of these appetitive phenomena are analogous to what is frequently observed during acute or chronic exposure to aversive situations and/or neuromodulatory stress hormones, in terms of their bidirectional effects on memory. Through effects on memory, stress hormones may modulate reward and reward relativity.     

Habituation To The Reinforcer May Contribute To Multiple-schedule Behavioral Contrast

Habituation to the reinforcer may contribute to multiple-schedule behavioral contrast. According to this argument, reducing reinforcers in one component of a multiple schedule reduces habituation to the reinforcer. Reducing habituation enhances the value, or effectiveness, of the remaining reinforcers, producing positive contrast. Enriching the reinforcers in one component increases habituation to that reinforcer. Increasing habituation decreases the effectiveness of the reinforcer, producing negative contrast. Such an idea is simple and parsimonious. It is not contradicted by any well-established finding in the contrast literature. It makes several tested and untested predictions that are unusual. However, habituation cannot explain all contrast. A complete explanation requires postulating that at least one additional mechanism, controlled by the conditions of reinforcement in the following component, also contributes to contrast.     

在亮度对比和颜色对比下立体视知觉的定量研究

研究了在亮度对比与等亮度颜色对比的条件下,受试者分辨随机点阵立体图对的立体视敏度（最小视差）．结果表明：（１）在亮度对比条件下,立体视敏度随对比度的增加而增加,１０％的对比度即可引起立体视知觉,对比度大于３０％时达到饱和;（２）在亮度对比与等亮度颜色对比两种不同的条件下,受试者的立体视敏度不存在有统计学意义的差异;（３）当双眼分别接受不同颜色的等亮度立体图刺激时,与亮度对比条件相比,受试者的立体视敏度无明显差异;（４）当受试者双眼分别接受由亮度对比和颜色对比形成的立体图刺激时,只有当颜色对比图中图形与背景间的对比度超过等亮度值３８％以上时,才能形成立体视知觉．以上结果提示,大、小细胞系统（包括斑点系统与斑点间系统）均参与立体视知觉信息的传递．     

THEOLOGICAL APPROPRIATION OF SCIENTIFIC UNDERSTANDINGS: RESPONSE TO HEFNER, WICKEN, EAVES, AND TIPLER

Abstract. Philip Hefner's focus on contingency and field as the guiding concepts in my thinking and his characterization of my theological enterprise as a Lakatosian research program are appropriate and helpful.
I welcome Jeffrey Wicken's holistic approach to the emergence of life. Theology can appropriate the language of self-organizing systems exploiting the thermodynamic flow of energy degradation for interpreting organic life as a creation of the Spirit of God.
However, I cannot sympathize with Lindon Eaves's equation of "hard science" with a reductionism which raises the double helix to the status of icon; the "meaning" of DNA derives from its place in the total phenomenon of life—not the reverse.
Frank Tipler's cosmology raises the prospect of a rapprochement between physics and theology in the area of eschatology. A Christian cosmology, however, would require at least three modifications: contingency in the history of creation; the uniqueness of Jesus' resurrection; and the relation of these to the problem of evil.     

Sprachspiel vs. vollständige Sprache

The article formulates a criticism of Wittgenstein's later philosophy which, in its substance, I would like to think, is fairly the same as the (hermeneutic) criticism issued by Apel and Habermas in the sixties. Contrary to these philosophers, however, I try to make the point by focusing on the distinction between language game and language, respectively between intralanguage relations of family resemblance (between language games) and interlanguage translation relations. The notion of a complete language is introduced — completeness of a language being, roughly, its possibility in principle of being translated into any (other) language — and the criticism of Wittgenstein is formulated as the allegation that he does not, or will not, acknowledge such a concept of completeness.So far the contents of the first part of the article. The rest of it assembles some hints, remarks and reminders which bear upon the question of the completeness of a language. These considerations include comments on the conditions of translatability, on the performative (agent's) knowledge or intention-in-action of the acting person, on Habermas' concept of communicative competence and on the notion of a responsible subject of action. It is alleged that to speak of translation and reporting an event as language games is misleading.     

高等师范院校公共课心理学整体改革建议

本文作者在实践的基础上,针对我国高等师范院校公共课心理学存在的问题,提出三点整体改革建议;1.在思想上明确认识该课程的双重任务;2.在教材建设方面,强调按照认知因素、非智力因素、社会心理因素和教师心理因素建构新的教材体系,教材内容突出应用性和可读性;3.教学过程教师要结合学生的专业特点。采用多种教学形式与方法传授教材内容。     

Discrete and continuous measures of dimensional stimulus control

In two sets of experiments, we examined dimensional stimulus control of pigeons' responses to a visual flicker-rate continuum. In the first experiment, responses to a single key were reinforced periodically during stimuli from one half of the stimulus continuum, and responses during other stimuli were extinguished. In the second experiment, two response keys were simultaneously available, with reinforcement for each response alternative associated with different halves of the stimulus continuum. Conditions of the second experiment involved either free-operant or discrete-trial stimulus presentations. Results from these experiments show that positive dimensional contrast appeared in discrimination tasks with one or two response alternatives, but only with free-operant procedures. In addition, discrimination between stimulus classes established by differential reinforcement was assessed as accurately by continuous rate measures as by discrete response choice in the two-alternative situation. The general implication of these experiments is that response rate measures, when properly applied, may reveal sources of variation within stimulus classes, such as dimensional contrast, that are not evident with discrete measures.     

Impure Agency and the Just War

Feminist critiques of intention challenge some aspects of traditional just war reasoning, including the criteria of right intention and discrimination (particularly as interpreted using the doctrine of double effect). I take note of these challenges and propose some directions just war reasoners might take in response. First, right intention can be evaluated more accurately by judging what actors in war actually do than by attempting to uncover inward dispositions. Assessing whether agents in war have taken due care to minimize foreseeable collateral damage, avoided intentional targeting of noncombatants, corrected previous mistakes in their later actions, and taken responsibility to repair unintended damage they cause are examples of ways in which just war reasoners can evaluate intention by looking at actions.     

知道感（FOK）和不知道感（FOnK）的双向实验分离

为了实现FOK（feeling-of-knowing）和FonK（feeling-of-not-knowing）的双向分离,实验一采用高频词或者低频词为线索项目,检验FOK和FOnK的预测准确性。结果发现,在低频线索条件下FOK的预测准确性表现出高于FOnK的预测准确性的趋势,而在高频线索条件下则正好相反,但上述两组差异并未在统计学上达到显著的程度。实验二采用词－非词对和相关词对两种实验条件,在证明相关词对条件可以促进FOK并降低FOnK的同时,观察到词－非词条件可以促进FOnK并降低FOK,从而在较为严格的意义上证明了FOK和FOnK是两个不同的维度的量。上述结果为知道感的“双过程假设”提供了进一步的实验证据