Testing the identity of trends under the restriction of monotonicity in repeated measures designs

Procedures are described for the analysis of profiles of means in repeated measures designs under order restriction for patterns of mean change. The exact likelihood ratio is derived for the case of two groups of subjects, and a computationally simple alternative to the exact likelihood ratio test is provided for designs involving more than two groups. Tables of critical values are provided for the case of simple-order alternatives.The author wishes to thank Joseph C. Saunders for his editorial assistance.     

Effects of d-amphetamine and cocaine on strained ratio behavior in a repeated-acquisition task.

Pigeons acquired a different four-response chain each session by responding sequentially on three keys in the presence of four colors. When the fixed-ratio requirement for food presentation was five completions of the chain, d-amphetamine and cocaine disrupted the behavior. As the dose of each drug was increased, the overall response rate decreased, the overall accuracy was impaired (i,e., percent errors increased), and there was less within-session error reduction (acquisition). In contrast, when the fixed-ratio requirement was either 20 or 50 completions of the chain, certain doses of both drugs produced large increases in the overall response rate by eliminating the extended pausing (ratio strain) that was characteristic of the control sessions. These rate-increasing effects were accompanied by error-decreasing effects, both during acquisition and after the response chain had been acquired. Taken together, the results show that the effects of d-amphetamine and cocaine on behavior in a repeated-acquisition task can be modulated by manipulating the value of the fixed-ratio schedule maintaining the behavior.     

The conditioned reinforcement of repeated acquisition

Three monkeys were trained to emit a chain of three responses on three separate levers in a set of six levers to obtain food. The chain producing food (correct chain) was changed each day. During a trial, a press on any lever produced a feedback stimulus; a press on a correct lever produced an additional distinctive stimulus; the third correct press produced a food pellet. Test sessions in which either the food or the distinctive stimuli were removed were interspersed with baseline sessions. In tests without food presentations, the subjects acquired the correct chain rapidly, with a level of accuracy comparable to baseline. Removing the distintive stimuli for either the first or second member of the correct chain greatly retarded acquisition of that member of the chain. Removing all distinctive stimuli often reduced accuracy throughout the chain to chance level, even though food was presented following each correct chain. These results were interpreted as evidence that the distinctive stimuli presented after correct responses functioned as conditioned reinforcers. Reductions in accuracy following an omitted distinctive stimulus indicated that they were also discriminative stimuli for correct responding in their presence.     

叠音品牌名称对消费者知觉和偏好的影响

品牌名称是重要的品牌资产,在传递品牌价值、构建品牌形象和凸显品牌特征的过程中起到关键作用。以往研究发现,品牌名称的语义特征和语音特征都会对消费者知觉和偏好产生影响,但少有研究考察品牌名称语音特征中叠音的作用。本研究将从婴儿图式的角度,基于刻板印象内容模型,通过4个实验考察叠音品牌名称对消费者知觉和偏好的影响,并检验元音特征和产品类型的调节作用。研究结果表明:(1)与非叠音品牌名称相比,叠音品牌名称会让消费者觉得该品牌更像婴儿,进而感觉该品牌更加温暖,但是能力更低。(2)叠音对于消费者温暖知觉的影响受到元音特征的调节。当品牌名称中含有前元音时,叠音对于温暖知觉的影响会削弱。(3)叠音对于消费者偏好的影响受到产品类型的调节。对于享乐型产品,消费者更偏好叠音品牌名称;对于实用型产品,消费者更偏好非叠音品牌名称。本文为品牌名称的设计提供了指导,同时也丰富了婴儿图式和刻板印象内容模型的理论内涵。     

A Negative Mood Induction Procedure with Efficacy Across Repeated Administrations in Women

Although several experimental techniques are effective in inducing negative mood, none has established efficacy over repeated testing. The lack of mood induction tools validated across repeated administrations impedes study of emotional changes in the same individual over time. A brief, sad mood induction combining music and an autobiographical memory was administered to 17 women on 6 occasions (two 3-day sets over a 2-week period of time). Mood was measured before and after the induction procedure. Repeated measures ANOVAs showed that the induction produced a large increase in POMS depression (d = 1.48) that recurred consistently across all testing days. A brief negative mood induction combining music and autobiographical memory appears suitable for use in studies that involve repeated administrations.     

Repeated,within‐session resurgence

Resurgence is a reliable, transient effect that only occasionally is replicated more than once within a single experiment or subject. In the present experiments, within‐session resurgence was generated repeatedly by dividing individual sessions into three phases (Training, Alternative‐Reinforcement, and Resurgence‐Test). In Experiments 1 and 2, resurgence reliably occurred in most of the 22‐30 daily sessions when responding was reinforced on, respectively, fixed‐ and variable‐interval schedules. Resurgence magnitude and duration did decrease across replications for some subjects, but not for others. To examine the utility of the procedure in studying the effects of an independent variable on resurgence, in Experiment 3 the effects of rich and lean baseline and alternative reinforcement rates on resurgence were compared. The target response was eliminated more rapidly, resurgence occurred more often, and usually was greater following rich alternative reinforcement rates. Resurgence was of greater magnitude when the baseline reinforcement rate was relatively lean compared to the alternative reinforcement rate. These experiments provide a reliable method for generating resurgence within individual sessions, instead of across multiple‐session conditions, that can be repeated over many successive sessions.     

Differential antagonism of cocaine self-administration and cocaine-induced disruptions of learning by haloperidol in rhesus monkeys

Six rhesus monkeys responding under a three-component multiple schedule were administered haloperidol to determine its effects on cocaine self-administration and on cocaine's disruptive effects on the repeated acquisition and performance of response chains. In the absence of haloperidol, 0.0032-0.032 mg/kg/infusion of cocaine increased response rate and the number of infusions in the self-administration component when compared to saline administration, whereas 0.1-0.32 mg/kg/infusion decreased response rate and the number of infusions. When compared to saline administration, the two lowest infusion doses of cocaine had little or no effect on responding in the acquisition and performance components; however, higher infusion doses of cocaine dose-dependently decreased response rate in these components. In addition, the higher doses of cocaine also increased the percentage of errors in the acquisition and performance components. Pretreatment with haloperidol (0.0032 or 0.01 mg/kg, i.m.) antagonized the effects of low doses of cocaine on the number of infusions in the self-administration component, whereas only the 0.01-mg/kg dose antagonized the effects of high doses of cocaine on the number of infusions. Neither dose of haloperidol antagonized the rate-decreasing effects of cocaine on responding in the acquisition and performance components significantly; the highest dose of haloperidol alone decreased rates of responding in each component. Antagonism of cocaine's error-increasing effects by haloperidol was only evident at one dose of cocaine (0.032 mg/kg/infusion), and was more complete in the performance components than in the acquisition components. Together, these data show the limited suitability of haloperidol for selectively antagonizing cocaine self-administration in the context of a multiple schedule involving transition behavior, and show the lack of uniform antagonism across operant behaviors.     

Derrida on teaching: The economy of erasure

This article explores Derrida's claim that teaching is a deconstructive process. In order to explore this claim, the Derridean concept of "erasure" is explored. Using the concept of erasure, this article examines two important aspects of teaching: the name that teachers establish for themselves, and, teaching against social power from a Derridean (erasure-oriented) perspective. Ultimately, the paper confirms Derrida's claim that teaching is indeed a deconstructive practice.

《庄子》哲学中的名与言

The examination of names and words constitutes an important aspect of the philosophy of Zhuangzi. With the debate over the relationship between name and reality as its background, this examination not only involves the connection between form and meaning, but also targets at the connection between concepts and objects. The debate over the relationship between name and reality correlates with the discussion of the connection between words and meanings or ideas. For Zhuangzi, the function of names and words is first and foremost embodied as the classification and distinction of being, while the Dao, as the universal principle of being, is characterized by equality and throughness. This leads to an inherent disparity and tension between names, words and the Dao. Zhuangzi℉s thinking and argument concern the connections between name and reality, words and ideas, and the Dao and words. This displays multiple theoretical perspectives and the complexity of its thought. Translated by Xiao Mo from Zhongguo Shehui Kexue 中国社会科学(Social Sciences in China), 2006, (4): 38–49