Melloration and maximization of reinforcement minus costs of behavior

Eight pigeons were exposed to independent concurrent schedules. Concurrent variable-interval 60-second variable-interval 60-second schedules were presented to one group of four subjects. Following baseline training, a limited hold was added to one of the schedules and the duration of the hold was decreased in successive conditions. Concurrent variable-interval 120-second variable-interval 40-second schedules were presented to another group of four subjects. These subjects were first exposed to decreasing durations of a limited hold in the variable-interval 40-second component. After replication of the baseline, a limited hold in the variable-interval 120-second component was decreased in duration. The initial durations of the holds were determined from the subjects' responding in the baseline conditions. A duration was chosen such that approximately 25% of the scheduled reinforcers would be canceled if responding remained unchanged.

Approximate matching of time proportions and reinforcement proportions was observed when the limited hold was added to the variable-interval 60-second schedule and when the limited hold was added to the variable-interval 40-second schedule. Time proportions were less extreme than reinforcement proportions when the limited hold operated in a variable-interval 120-second schedule. Overall reinforcement rates tended to decrease with continued training in concurrent schedules with a limited hold. Absolute deviations from time matching also decreased. The results provide evidence against the principle of reinforcement maximization, and support Herrnstein and Vaughan's (1980) melioration hypothesis.

     

Short-term memory in the pigeon: delayed-pair-comparison procedures and some results.

A discrete-trials, delayed-pair-comparison procedure was developed to study visual short-term memory for tilted lines. In four experiments, pigeons' responses on left or right keys were reinforced with food depending on whether a comparison stimulus was or was not the same as a standard stimulus presented earlier in the same trial. In Experimental I, recall was an increasing function of the exposure time of the to-be-remembered stimulus and was a decreasing function of the retention interval. In Experiment II, retroactive interference was investigated: recall was poorer after a retention interval during which was presented either a tilted line or contextual stimuli in the form of the illuminated experimental chamber. In Experiment III, a subject was required to engage, throughout the retention interval, in one or the other of two different behaviors, depending on which of two stimuli a subject was to remember. This mnemonic strategy vastly improved recall after 15- and 20-second retention intervals. In Experiment IV, the opposite end of the performance continuum was studied: by combining the effects of a larger stimulus set and the effects of what presumably was an increased memory load, performance was reduced to approximately chance levels after retention intervals shorter than 1 second.     

医疗机构单病种限价面面观

单病种限价收费是医院经营的一种管理模式,是指在临床诊疗收费中,对单一病种病人限定最高费用的做法,是医院的一种自发行为。这在一定程度上解决了群众看病难、看病贵的问题,缓解了社会医疗费用过度增长的压力,有助于医疗机构收费更趋于合理化。拟从社会的各个层面对医疗机构单病种限价问题进行深入地探讨。     

Analysis of residuals for the multionmial item response model

Using the item response model as developed on the multinomial distribution, asymptotic variances are obtained for residuals associated with response patterns and first-, and second-order marginal frequencies of manifest variables. When the model does not fit well, an examination of these residuals may reveal the source of the poor fit. Finally, a limited-information test of fit for the model is developed by using residuals defined for the first-, and second-order marginals. Model evaluation based on residuals for these marginals is particularly useful when the response pattern frequencies are sparse.The author would like to thank Yasuo Amemiya and Joseph Lucke for helpful suggestions. This research was supported by a Research Incentive Grant from Arizona State University.     

无意视盲的认知神经机制

无意视盲现象是指即使某些刺激物出现在视野中, 观察者也并没有觉察到这些刺激物的存在。这种现象在我们的现实生活中普遍存在, 它是许多交通和医疗事故的罪魁祸首。回顾前人的研究结果我们发现, 从认知行为角度出发, 无意视盲主要由两方面原因引起, 即“资源有限”与“注意定势”。一般情况下, “资源有限”与“注意定势”会共同导致无意视盲; 但有时候, “注意定势”也会独立于“资源有限”直接导致无意视盲。另外, 从大脑神经机制的角度来看, “资源有限”与“注意定势”作用于大脑加工的中后期, 即使产生无意视盲, 意识加工脑区对非预期刺激也进行了一定的认知加工, 但是否能进入到意识层面, 一方面取决于刺激呈现后中期枕顶部位的意识输入, 另一方面取决于与刺激驱动相关的颞顶联合区的激活程度以及与记忆负荷相关的顶内沟的抑制程度。     

AN INTELLECTUALLY HONEST THEOLOGY

A hallmark of Arthur Peacocke's work is his aim of writing theology that is intellectually honest. He believed that intelligibility and meaning are foremost on theology's agenda. Consequently, he focused on ultimate meanings, but he did so by taking into account the scientific knowledge of the world. He faced head‐on the challenge to accept the Christian tradition, at the same time subjecting that tradition to critique and reforming its images and modes of thinking. I survey Peacocke's agenda, his methodology, and the sources of his theological thinking, and how this contributes to understanding the relationship between science and theology. A major result of his approach is the abolition of dualisms, specifically that of the natural and the supernatural. Peacocke's approach to theology has exemplary potential for the debate between those who espouse a radical Enlightenment with its claim to universal principles of reason and radical postmodernists who may appear to fall prey to a relativism that equals nihilism.     

Methodological and theoretical issues on psychological traditionality and modernity research in an Asian society: In response to Kwang-Kuo Hwang and beyond

Three objectives are addressed in the present study. First, the methodological and conceptual aspects of my long-term research program on psychological (individual) traditionality and modernity in Taiwan are briefly reviewed to provide a background for systematically responding to Kwang-Kuo Hwang's critique of the research program. Second, my reply to Hwang is made in terms of five major issues, viz. the methodological approach adopted, the theoretical or conceptual basis, the explanation of the discontinuity between individual traditionality and modernity, the semantic opposites and psychological opposites, and the conceptual evaluation of the traditionality and modernity items. Third, a plea is made for conducting more and better studies on individual traditionality and modernity in developing Asian countries. Methodological and theoretical issues are further discussed and clarified for the sake of conducting methodologically and theoretically sounder research in this area.     

Romantic relationships of young people with childhood and adolescent onset antisocial behavior problems

Using prospective longitudinal data from the Christchurch Health and Development Study, this paper examines the extent to which early onset, life course persistent and adolescent limited antisocial behavior problems place young people at risk of violent and unsatisfactory romantic relationships in early adulthood. Results revealed the presence of clear linear associations between the developmental timing of antisocial behavior and later partnership risks, with these risks including partner violence perpetration and victimization, interpartner conflict, and increased ambivalence about the relationship. Young people with childhood onset antisocial behavior problems reported higher rates of partnership difficulties than young people with adolescent limited antisocial behavior problems, while those with adolescent limited antisocial behavior reported higher levels of partnership difficulties than young people without a history of antisocial behavior problems. These associations persisted even after extensive control for a range of social, family, and individual factors that were correlated with the timing of antisocial behavior. Results highlight the importance of distinguishing between early and late onset antisocial behavior, and provide further support for existing life course models of the development of antisocial behavior problems in children and adolescents.     

Development of adolescence‐limited,late‐onset,and persistent offenders from age 8 to age 48

This article investigates the life success at ages 32 and 48 of four categories of males: nonoffenders, adolescence‐limited offenders (convicted only at ages 10–20), late‐onset offenders (convicted only at ages 21–50), and persistent offenders (convicted at both ages 10–20 and 21–50). In the Cambridge Study in Delinquent Development, 411 South London males have been followed up from age 8 to 48 in repeated personal interviews. There was considerable continuity in offending over time. Persistent offenders had the longest criminal careers (averaging 18.4 years), and most of them had convictions for violence. Persistent offenders were leading the most unsuccessful lives at ages 32 and 48, although all categories of males became more successful with age. By age 48, the life success of adolescence‐limited offenders was similar to that of nonoffenders. The most important risk factors at ages 8–18 that predicted which offenders would persist after age 21 were heavy drinking at age 18, hyperactivity at ages 12–14, and low popularity and harsh discipline at ages 8–10. The most important risk factors that predicted which nonoffenders would onset after age 21 were poor housing and low nonverbal IQ at ages 8–10, high neuroticism at age 16, and anti‐establishment attitudes and motoring convictions at age 18. It was suggested that nervousness and neuroticism may have protected children at risk from offending in adolescence and the teenage years. Aggr. Behav. 35:150–163, 2009. © 2009 Wiley‐Liss, Inc.     

MEGA♪: An Ecological Risk Assessment Tool of Risk and Protective Factors for Assessing Sexually Abusive Children and Adolescents

MEGA^? is a comprehensive, ecologically framed, structured risk assessment tool for assessing sexually abusive behavior, coarse sexual improprieties, or both in all youth under 19 years, including male and female adjudicated and nonadjudicated youth, children under 12, and youth with low intellectual functioning. MEGA^?, or Multiplex Empirically Guided Inventory of Ecological Aggregates for Assessing Sexually Abusive Adolescents and Children (Ages 19 and Under; Miccio-Fonseca, 2006b Miccio-Fonseca, L. C. 2006b. Multiplex Empirically Guided Inventory of Ecological Aggregates for Assessing Sexually Abusive Children and Adolescents (Ages 19 and Under)—MEGA^?, San Diego, CA: Author.  [Google Scholar]) is composed of 7 aggregates and 4 distinct risk scales: (a) Risk Scale, (b) Protective Risk Scale, (c) Estrangement Risk Scale, and (d) Persistent Sexual Deviancy Scale. Discussed are the internal consistency findings on a sample of 1,184 (979 males and 205 females). MEGA^?'s Risk and Protective Risk Scales are discussed in depth.