Perceived social context and risk preference: A re-examination of framing effects in a life-death decision problem

This study examines the effects of perceived group context on subjects risk attitudes and their sensitivity to the framing of choice outcomes in a ‘life-death’ decision problem. It seeks to uncover the psychological mechanisms underlying decision-making biases by systematically manipulating the decision context in which the ‘life-death’ problem was described. The study revealed that subjects risk preferences varied as a function of the experimental manipulations. Previously observed reversals in preferences (framing effects) appeared in large-group contexts and disappeared in small-group and family contexts. When considering the fate of small groups, subjects unambiguously favored the probabilistic outcome, no matter how the ‘life-death’ decision problem was framed. The empirical data obtained from the present study suggest that human choice patterns are behaviorally distinguishable across large-group, small-group, and family social contexts.     

差数显著性t检验与元分析的对比研究

利用计算机构造被试总体、模拟实验研究程序进行抽样研究,探讨显著性ｔ检验方法与元分析方法在检验实验结果数据方面的差异。在模拟实验过程中,ｔ验受到显著性水平、样本容量和总体效果大小的影响,因此最终影响了统计推断的可靠性,建议：在进行显著性检验过程中,应对统计检验能力进行估计;元分析方法以样本为元素对总体进行推断,因此具有很高的准确性和可靠性,它将很有可能成为今后心理学研究的重要统计工具。     

损毁下丘脑弓状核、中缝背核和蓝斑对大鼠应激镇痛的影响

本文用不能躲避的间歇脚底电刺激引起大鼠应激,用电刺激鼠尾-嘶叫法测定镇痛效应,研究下丘脑弓状核(脑内β-内啡肽能神经元胞体集中的部位)、中缝背核(脑内5-羟色胺能神经元胞体主要集中的部位之一)和蓝斑(脑内去甲肾上腺素能神经元胞体主要集中的部位之一)与应激镇痛的关系。 用新生大鼠腹腔注射谷氨酸-钠的方法损毁弓状核后,用海人酸和电解两种方法损毁中缝背核或蓝斑后,应激镇痛效应均明显减弱。由于谷氨酸-钠和海人酸只选择性地损毁神经元胞体,故认为脑内的β-内啡肽能神经元、5-羟色胺能神经元和去甲肾上腺素能神经元均参与应激的行为镇痛。     

Self-focused attention and reactions to conflicting standards

A fundamental postulate of self-awareness theory that has received considerable empirical support is that self-focused attention increases behavioral consistency with “standards of correctness.” This appears to be true whether the standards are internal (such as attitudes or values) or external (e.g., norms). There is some question, however, as to what happens in situations in which an important personal standard conflicts with a salient external standard. Research by E. Diener and T. K. Srull (Journal of Personality and Social Psychology, 1979, 37, 413–423) has suggested that under such circumstances the social standard is likely to predominate. However, there is reason to believe that the standards employed in their study may not have been very salient nor very important to the subjects. In the present experiment, subjects with either conservative or liberal sexual attitudes were exposed to information suggesting a prevailing norm of sexual liberalism. They were then asked to respond to a number of sexual and nonsexual attitude measures while their attention was or was not self-directed by means of a mirror. Primary results indicated that self-awareness enhanced conformity to the social standard (as in Diener & Srull, 1979) for the conservative subjects; however, correlational analyses within the self-focused and non-self-focused conditions indicated that self-aware subjects did not “abandon” their personal standards when responding to the conformity pressure. Instead, their responses tended to be more in line with their previously expressed attitudes than did the responses of the non-self-focused group. Results are discussed in terms of the effects of self-awareness on reactions to potent, but conflicting behavioral standards.     

Effects of response-dependent and independent electric shock on schedule-induced polydipsia

In Experiment I, lever pressing by rats was maintained by the delivery of food pellets under a 45-sec fixed-interval schedule. Fixed-time 180-sec and fixed-interval 180-sec schedules of shock delivery were systematically superimposed on the baseline food schedule to study effects on schedule-induced water intake. Response-dependent shock had little, if any, effect on water intake, whereas shocks independent of lever pressing attenuated fluid intake. In Experiment 2, rats received food pellets under a fixed-time 60-sec schedule. Electric shock delivered concurrently under a variable-time 180-sec schedule, but never while the animal was licking or within 5 sec after licking terminated, led to similar attenuation of water intake. These findings suggest that schedule-induced polydipsia is sensitive to differences in the functional properties of response-independent and dependent electric shock.     

The Stress-Arousal Checklist as a measure of situational stress versus simple arousal

The Stress-Arousal Checklist was developed as a self-report measure both of arousal and of the favorable or unfavorable appraisal of that arousal. Previous studies with the checklist showed differential sensitivity of the two subscales to experimental manipulations. In the present study, the convergent and discriminant validity were further explored by comparing scores with those on the State-Trait Anxiety Inventory-State. The results supported the validity of the two-factor structure.