Brief-stimulus presentations on multiform tandem schedules

Three experiments examined the influence of a brief stimulus (a light) on the behavior of food-deprived rats whose lever pressing on tandem schedules comprising components of different schedule types resulted in food presentation. In Experiment 1, either a tandem variable-ratio variable-interval or a tandem variable-interval variable-ratio schedule was used. The variable-interval requirement in the tandem variable-ratio variable-interval schedule was yoked to the time taken to complete the variable-ratio component in the tandem variable-interval variable-ratio schedule, and the length of the variable-interval component in the latter schedule was yoked to the variable-ratio component in the former schedule. If a brief stimulus occurred following completion of the first component, then behavior was differentiated in the two components; subjects responded more quickly in the variable-ratio than in the variable-interval component. If the stimulus was removed, then response rate was determined by the nature of the final component. Similar results were obtained in Experiments 2 and 3 with the use of a three-component tandem variable-ratio variable-interval variable-ratio schedule or tandem variable-interval variable-ratio variable-interval schedule. Thus, a brief stimulus that was not explicitly paired with reinforcement engendered behavior typical of the component schedule preceding its presentation.     

Effects upon rats' responses on a running wheel of single alternation of large and small rewards and external cues

Thirty-two rats were trained to run on a running wheel for one or six pellets of food, in either single alternation (SA) or quasi-random sequences of reward magnitude and with external cues either informing or not informing the rats of the reward magnitude. Reward-magnitude discrimination was clearly shown when the informative cues were given, but without such cues the SA patterning of responding appeared only late in training. The reward-magnitude discrimination developed most quickly when internal (SA) cues and external informative cues were both present; the effects of these two classes of cues on discrimination were interactive rather than additive. Possible explanations are given for the superior discrimination under the condition where both the internal and external cues were present over the condition when only the external cues were present.     

Distinguishing between haloperidol's and decamethonium's disruptive effects on operant behavior in rats: use of measurements that complement response rate.

The behavioral effects of haloperidol (0.04 to 0.16 mg/kg) and nonparalytic doses of decamethonium (0.2 to 0.8 mg/kg) were studied with operant methods that permitted the measurement of response rate, peak force of response, duration of response, and duration of the rat's head entry into the reinforcement dipper well. Type of operant response topography (forelimb press or forelimb grasp-and-pull) and peak force (low or high) required for reinforcement delivery were independent variables. The low-force, press-topography condition yielded qualitatively different profiles for the two drugs. Haloperidol increased peak force and duration of operant response, increased maximum head entry duration, and temporally dissociated forelimb and head entry behavior. Decamethonium decreased force and duration of operant response, did not appreciably affect maximum head entry duration, and did not influence the normal temporal coupling of forelimb and head entry responses. The haloperidol effects were seen as reflections of pseudo-Parkinsonism, not muscle weakness, which appeared to be the primary source of decamethonium's behavioral effects.     

对体液免疫反应的条件反射性调节

以饮糖精水作为条件刺激(conditioned stimulus,CS),腹腔注射免疫抑制剂环磷酰胺作为非条件刺激(unconditioned stimulus,UCS)训练Wistar大鼠,3天后腹腔注射卵清蛋白(ovalbunfin,OVA)抗原,观察再次单独条件刺激对原发性体液免疫反应的作用。结果发现．一次CU-UCS结合训练导致CS组大鼠对再现糖精水产生厌恶反应,外周血中抗OVA-IgG抗体水平显著低于UCS组。两次CS-UCS结合训练并多次给予条件刺激后,CS组大鼠抗OVA-IgG的条件性免疫抑制效应与一次CS-UCS结合训练及再次给予一次条件刺激的反应类同。这些结果证明条件刺激增强了环磷酰胺对动物原发性体液免疫反应的抑制作用．这种条件性体液免疫抑制作用是相对稳定和有限度的,不易受条件反射建立参数的影响。     

《周易参同契》的丹道易学

魏伯阳的《周易参同契》运用西汉及东汉早期的象数易学 ,通过观象、立卦、“拟诸其形容” ,使无形的不易感触的微观的运动 ,摆脱感观的局限而诉诸于形容 ,将丹道与易道结合 ,以推阐还丹之理 ,使丹术得以升华 ,同时又引导道教完成了由外丹向内丹的转化。正是《参同契》的丹术对《周易》原理的精妙运用 ,使它通过神仙方术和炼丹术的形式 ,接续了中国文化所固有的传统理念 ,承转了中国文化的慧命 ,故而使《周易参同契》在中国道教史、易学史和科技史上享有崇高的地位     

“It Depends on What You Mean by Starting”: An Exploration of How Women Define Initiation of Aggression and Their Motives for Behaving Aggressively

This study explored women's use of aggression, focusing on how they define initiation of aggression and what motives they have for behaving aggressively. Twenty-five women who had used aggression during conflicts with their romantic partners were interviewed. Results indicated that, while the women reported initiating aggression in the majority of conflicts described (54%), they varied in how they defined initiation, with some believing that initiating aggression meant being angry, bringing up the conflict issue, or persistently asking the partner to engage verbally. Twelve categories of motives for the use of aggression were also identified. Theoretical and practical implications are discussed, highlighting the ongoing need for an ecological perspective when studying women's use of aggression.     

受众对广告中性别角色定型反应的研究

为了了解广告中性别角色定型对受众产生的影响,通过问卷调查,探讨了个体性别角色、性别、年龄和受教育程度对广告中性别角色定型反应的影响过程。结果发现:性别、个体性别角色(分为传统性别角色和非传统性别角色)、年龄和受教育程度可以通过女性自主性意识间接影响受众对广告中女性模特被冒犯性描述的知觉,进而影响受众对企业的负面评价和购买欲望;研究同时发现年龄可以直接预测受众的购买欲望。     

以兔抗鼠淋巴细胞血清为非条件刺激的条件性免疫抑制

采用一种生物类免疫抑制剂-兔抗鼠淋巴血清（rabbit anti-rat lymphocyte serum,ALS）为非条件刺激（UCS）,糖精水为条件刺激（CS）,以双瓶给水法置于鼠笼前端饮用偏好侧。在一次性CS-UCS结合训练后,单独再次给予CS,使卵清蛋白（OVA）免疫过的大鼠表现出脾淋巴细胞对有丝分裂原PWM的增殖反应降低,血抗OVA抗体的总量及脾内抗OVA抗体生成细胞的减少,但动物未表现出条件性味觉厌恶的行为反应。这些结果表明条件性免疫抑制与味觉厌恶行为条件反射没有必然联系,并非是厌恶行为反应或情绪应激的伴随产物。UCS也并非必需具有感觉的毒副作用,条件性免疫抑制是脑高级神经活动调节免疫功能的结果。     

性别角色认定对领导风格的影响：以女性创业者为例

领导风格的性别差异一直受到关注。以往的研究有两种观点：领导风格存在性别差异,女性的领导风格更有效;领导风格不存在性别差异。而最新研究认为领导风格差异源于社会性别角色,探讨女性创业者的性别角色认定特征及其对领导风格的影响十分必要。实证结果显示,不同性别角色认定的女性创业者在领导风格上存在差异,双性化者多采用高定规、高关怀的领导方式,女性化者多采用高关怀的方式,而男性化者则多采用高定规的方式。影响领导风格的并不是个体的性别本身,而是其对性别角色的认定。     

Immigration and femininity in Southern Europe: A gender‐based psychosocial analysis

Despite the growing presence of female immigrants in Western countries, research on the subject highlights two important biases that hinder appropriate explanation of the migratory phenomenon and hence prevent adequate intervention. First, most of the research studies conducted so far focus on male migration; second, the macro‐social perspective has prevailed in these areas of study since socio‐economic and political aspects have taken centre stage in analyses on migratory phenomena, From a gender‐based psychosocial perspective, this study addresses the migration project of 53 women from different South American countries, the Maghreb region and Eastern Europe now living in Southern Spain. For this purpose we conducted 23 in‐depth interviews, and staged six discussion groups with the aim of elucidating to what extent gender‐based psychosocial beliefs—stereotypes, ideology and identity—determine women's migration process. Our results suggest that the main stages in the process—deciding to emigrate, itinerary for social and labour integration in the host country, and general assessment of the migration experience—are strongly influenced by psychosociological constructs which arise as a result of female gender‐typing or female profile. Copyright © 2008 John Wiley & Sons, Ltd.