Framing effects in group investment decision making: role of group polarization

Prospect theory proposes that framing effects result in a preference for risk-averse choices in gain situations and risk-seeking choices in loss situations. However, in group polarization situations, groups show a pronounced tendency to shift toward more extreme positions than those they initially held. Whether framing effects in group decision making are more prominent as a result of the group-polarization effect was examined. Purposive sampling of 120 college students (57 men, 63 women; M age = 20.1 yr., SD = 0.9) allowed assessment of relative preference between cautious and risky choices in individual and group decisions. Findings indicated that both group polarization and framing effects occur in investment decisions. More importantly, group decisions in a gain situation appear to be more cautious, i.e., risk averse, than individual decisions, whereas group decisions in the loss situation appear to be more risky than individual decisions. Thus, group decision making may expand framing effects when it comes to investment choices through group polarization.     

Group risk-taking and group polarization

There are two aims to this paper; to report in brief preliminary form a number of studies on group risk-taking that have been carried out in Bristol in the past two years, and to relate these studies to an explanation of group risk-taking phenomena primarily in terms of group polarization. The paper has five sections. The first section supplies some background material regarding basic phenomena and previous attempts at explanations. The second section relates to initial individual decisions and the third section to decisions following group discussion and consensus. In the fourth section a tentative explanation of group risk-taking effects is proposed in terms of group polarization processes, together with something like an overall value for risk. Group polarization itself is discussed in terms of normative and informational aspects of social influence. The final section deals with two implications of the proposed explanation, one relating to the role of individual familiarization and the other to the generality of group polarization processes.     

Influence of leadership processes on group polarization

This research attempted to examine underlying processes of group polarization under leadership conditions. One hundred and twenty-two subjects formed in groups of four and five members answered to the Choice Dilemma Questionnaire first on an individual basis and then after group discussion. Experimental conditions were manipulated through different rules of group discussion and types of appointed leaders. It was found that leadership is associated both with group polarization and with group depolarization but whether the group polarizes or depolarizes is determined by the explicit or implicit group rules which act as a systemic decisional structure.     

Changing Meanings Through Art: A Systematization of a Psychosocial Intervention with Chilean Women in Urban Poverty Situation

This study explores the experiences that women in urban poverty situation have about their participation in a psychosocial group intervention mediated by artistic techniques. An investigation was done using a qualitative methodology. Participants were ten women older than 21 years old who live in Santiago de Chile in poverty situation. Two group evaluations were performed during the intervention process and once it was completed, ten individual semi-structure interviews. The information was analyzed following the proposals of Grounded Theory, identifying negative experience about tiredness and sacrifice related to the circumstances they live in. It was possible, at the same time, to describe the benefits of an artistic activity including a psychosocial work over the individual well-being. The artistic creation was revealed as a way of expression, of re-viewing oneself and the environment, and relaxation. Transformation is discussed concerning self-affirmation, reparation and transference of this experience in their lives, as a preventive and protective resource to overcome their problems.     

相对剥夺感:想得、应得、怨愤于未得

相对剥夺感是指与某一标准相比较,个体觉得自己或自己所在群体状况更加糟糕,并产生生气或怨恨的情感反应。相对剥夺感包括个人相对剥夺感和群体相对剥夺感。研究表明,家庭收入、主观社会阶层、内群体认同,以及社会变化的速度和方向等对个人或群体相对剥夺感产生显著影响。相对剥夺感对个体的身心健康和行为,以及群体的态度与行为均具有显著的影响。但是,有关相对剥夺感与公正理论的异同、相对剥夺感的测量、参照对象与比较方式,以及相对剥夺感影响心理与行为的机制等方面还有待深入探讨。     

Behavioral variability as a function of noncontingent adult attention,peer availability,and situational demands in three hyperactive boys

Recommendations about placements for children in need of special education are routinely made and carried out without empirical validation for the efficacy of particular approaches nor the appropriateness of an approach for a particular child. A study was designed to examine a methodological model which focuses on empirically deriving recommendations for the most appropriate teaching situation for any given child requiring special education. Prosocial, problem, and task-related behaviors in three hyperactive boys were assessed in eight prearranged situations: (1) group play with one adult supervising; (2) group play with three adults; (3) group teaching with one adult; (4) group teaching with three adults; (5) individual play with low density noncontingent adult attention; (6) individual play with high density noncontingent adult attention; (7) individual teaching with low density noncontingent adult attention; and (8) individual teaching with high density noncontingent adult attention. Behaviors assessed included adult, peer, and target child attention given and received; compliance; aggression; disruption; task involvement; and percent tasks correctly completed of tasks attempted. Data revealed that the most disruptions and least efficient task performance occurred in the group teaching situation with one adult. The most efficient task performance and fewest disruptions in a teaching situation occurred in the individual teaching setting with high density noncontingent adult attention. In addition. overall mean rates of disruptive behavior were higher in group situations than in individual situations. The data strongly validate the need for carefully selecting educational environments for problem children, and that the behavior of such children is, at least, partially influenced by environmental factors.     

Reasoning Is for Arguing: Understanding the Successes and Failures of Deliberation

Theoreticians of deliberative democracy have sometimes found it hard to relate to the seemingly contradictory experimental results produced by psychologists and political scientists. We suggest that this problem may be alleviated by inserting a layer of psychological theory between the empirical results and the normative political theory. In particular, we expose the argumentative theory of reasoning that makes the observed pattern of findings more coherent. According to this theory, individual reasoning mechanisms work best when used to produce and evaluate arguments during a public deliberation. It predicts that when diverse opinions are discussed, group reasoning will outperform individual reasoning. It also predicts that individuals have a strong confirmation bias. When people reason either alone or with like‐minded peers, this confirmation bias leads them to reinforce their initial attitudes, explaining individual and group polarization. We suggest that the failures of reasoning are most likely to be remedied at the collective than at the individual level.     

The Effect of Group Polarization on Opposition to Donald Trump

Using focus groups, we examined support and opposition for Donald Trump prior to the 2016 presidential election. When ingroup members participate in discussion, this conversation alone typically strengthens and intensifies members’ initial attitudes. We used a pre‐ to post‐focus‐group questionnaire to assess attitudes toward Trump, his campaign, and policies. We argue that group polarization influenced people’s opinions about Trump such that attitudes became more extreme after discussion with like‐minded individuals. We report changes for Trump nonsupporters for which group polarization occurred on attitudes toward illegal immigration, political correctness, the military, women, and veterans after the group discussion. For each, level of support for Trump’s views decreased. To further explore potential psychological mechanisms associated with group polarization, we employed network science methods to examine the structure of the language associated with these issues and identify potential drivers of attitude change. Results provide some support for a common mechanism for group polarization, which may be driven by language dynamics specific to individual attitudes.     

Evaluation of a lag schedule of reinforcement in a group contingency to promote varied naming of categories items with children

We compared the effects of Lag 0 and Lag 1 schedules of reinforcement on children's responses naming category items in a group context and subsequent responses emitted during individual testing in which the schedule of reinforcement remained Lag 0. Specifically, we measured response variability and novel responses to categories for 3 children who demonstrated the lowest level of variability during an initial individual Lag 0 testing session. An additional 3 children who emitted a high level of variability during initial individual Lag 0 testing sessions served as peers during group sessions. Results showed that participants conformed to the Lag 1 schedule and were more likely to repeat peer responses in the group and during individual testing in the Lag 1 condition. Furthermore, the reinforcement schedule in effect during group sessions affected participants’ varied responses during individual testing, during which the reinforcement schedule remained unchanged.     

Novel argumentation and attitude change: The case of polarization following group discussion

This study is concerned with attitude polarization as a function of two properties of a persuasive message: (a) its validity or acceptability and (b) its novelty. The latter is defined as the extent to which the message contains new arguments unlikely to have been already considered by the individual. Acceptability is assumed to be a necessary condition for inducing attitude change; the impact of novelty, therefore, was expected to be most pronounced for arguments of high validity. This hypothesis was tested in two related studies using arguments produced in response to choice dilemma items, widely used in research on polarization. First, it was shown that arguments rated as both valid and novel were perceived as more persuasive than arguments rated either as highly valid but obvious (non-novel) or as low in validity (non-valid) but novel. Second, when subjects read samples of valid arguments, their attitudes polarized in the direction advocated by the novel arguments rather than by the non-novel ones. These findings are considered relevant to the polarization of attitudes in groups. Other research demonstrates that this phenomenon is the result of persuasive arguments raised during group discussion, The present study suggests why such arguments may be persuasive.     

Social dominance and priority of access to drinking in Lemur macaco

Social dominance was analyzed in a group of Lemur macaco over a one-year period. A gonistic dominance was assessed by computing a dominance index for each individual in baseline conditions and in a competitive drinking situation, where success was measured as the amount of time in possession of the resource (a hottle of fruit juice). Dominance indexes during drinking competition were significantly correlated with baseline dominance indexes but were not correlated with individual drinking success. Adult females were agonistically do, omsmy over all other individuals, but were frequently challenged by juveniles of both sexes for access to the drinking bottle. In males, there was a significant negative correlation between age and dominance indexes during competition tests, and between age and drinking success. Results are analysed in the ligh of recent theories concerning the emergence of female social dominance. © 1993 Wiley-Liss, Inc.     

Social comparison influences on disciplinary panels: a brief qualitative study in Kenyan secondary schools

This study investigated the influences of social comparisons on group polarization in decision making among members of selected Kenyan secondary school disciplinary panels. Ten participants from 10 selected secondary school disciplinary panels were involved. Semi-structured interviews were used to collect qualitative data on the experiences of the participants regarding the influences of social comparisons on their decision-making behaviours during participation in their schools’ disciplinary hearing meetings. The results revealed that in the dynamic interactions among disciplinary panel members during disciplinary hearing meetings, the panel members engaged in social comparisons among themselves, leading to their shifts in decision-making behaviours in favour of consensus in group decisions or group polarization in decision making.     

Human behaviour in severe tunnel accidents: Effects of information and behavioural training

Immediate user self-evacuation is crucial in case of fire in road tunnels. This study investigated the effects of information with or without additional virtual reality (VR) behavioural training on self-evacuation during a simulated emergency situation in a road tunnel. Forty-three participants were randomly assigned to three groups with accumulating preventive training: The control group only filled in questionnaires, the informed group additionally read an information brochure on tunnel safety, and the VR training group received an additional behavioural training in a VR tunnel scenario. One week later, during the test session, all participants conducted a drive through a real road tunnel in which they were confronted with a collision of two vehicles and intense smoke. The informed and the behaviourally trained participants evacuated themselves more reliably from the tunnel than participants of the control group. Trained participants showed better and faster behavioural responses than informed only participants. Interestingly, the few participants in the control group who reacted adequately to the scenario were all female. A 1 year follow-up online questionnaire showed a decrease of safety knowledge, but still the trained group had somewhat more safety relevant knowledge than the two other groups. Information and especially VR behavioural training both seem promising to foster adequate self-evacuation during crisis situations in tunnels, although long term beneficial behavioural effects have to be demonstrated. Measures aiming to improve users’ behaviour should take individual difference such as gender into account.     

文化对个体风险感知的影响:文化认知理论的解释

文化认知理论旨在从个体层面研究与文化因素相关的个体风险感知差异。它以"格-群"维度划分文化世界观,"格"维度衡量社会的制度化程度,"群"维度衡量社会群体对个体的影响程度,由此编制文化认知量表以测量个体文化理念差异。目前已验证认同保护认知、偏见同化与群体极化、文化易得性、文化可信性、文化认同确认五种作用机制,并在情感启发式研究的基础上引入文化冲突模因作为中介变量建立理论模型。后续研究可推进文化认知测量工具的跨文化检验与本土化修订,并在具体风险主题研究的基础上探索切实可行的公共风险管理对策。     

移情反应的研究 ——基于个体倾向与情境的双重视角

摘 要：本研究基于个体倾向和情境的双重视角,将静态与动态相结合,探讨不同移情能力的个体在真实性不同情境中的移情反应。结果发现： （1）移情能力高、低分组得分存在显著性差异;（2）情境真实性高、低两种情境之间差异不显著;（3）在某些具体的移情反应上,移情能力与情境的交互作用显著;（4）性别差异不显著。属个体倾向范畴的移情能力对移情反应具有显著影响,情境对移情反应的影响与移情能力有关,移情能力高的个体对情境的变化更为敏感。     

Development of neuronal responsiveness in the mediorostral neostriatum/hyperstriatum ventrale during auditory filial imprinting in domestic chicks

Chronic electrophysiological recordings of slow field potentials from tone-imprinted chicks show significantly enhanced fast Fourier transform (FFT) power during playback of rhythmic 400-Hz imprinting tone stimuli in the presence of a surrogate mother. The FFT power was already significantly higher during the very first imprinting session, when the chick was exposed to the imprinting tone stimuli in the presence of the surrogate mother compared to spontaneous activity (EEG recordings). During discrimination tests, where individual chicks were exposed to the imprinting tone stimuli in alternation to rhythmic 700-Hz tone stimuli (discrimination tone stimuli), the FFT power was significantly higher during playback of the imprinting tone stimuli than the FFT power during playback of the discrimination tone stimuli. Chicks which were imprinted in the absence of the surrogate mother also show enhanced FFT power in the course of the imprinting sessions; however, in contrast to the first group, they did not show significant differences in the FFT power during playback of either the imprinting or discrimination tone stimuli in the discrimination tests. Our results suggest that the high FFT power of a potential imprinting stimulus or situation, which is expressed in newborn (still naive) chicks, is maintained only when the chicks form an association between the tone stimuli and a positive emotional situation (represented by the surrogate mother).     

Associative frequency as a measure of associative strength

FlekkØy, K. Associative frequency as a measure of associative strength. Scand. J. Psychol., 1973, 14, 99–102. -Associative frequency in a group of subjects has been assumed to reflect associative strength in the individual. This hypothesis was tested by comparing frequency rank of responses in a single-word free-association situation with sequence of emission of the same responses in a continued situation. The results indicate that associative frequency reflects associative strength, but not to an extent which will allow the identification of individual associative-strength hierarchies.     

Starting from scratch and building brick by brick in comprehension

During narrative comprehension, readers construct representations of the situation described by a text, called situation models. Theories of situation model construction and event comprehension posit two distinct types of situation model updating: incremental updating of individual situational dimensions, and global updates in which an old model is abandoned and a new one created. No research to date has directly tested whether readers update their situation models incrementally, globally, or both. We investigated whether both incremental and global updating occur during narrative comprehension. Participants typed what they were thinking while reading an extended narrative, and then segmented the narrative into meaningful events. Each typed think-aloud response was coded for whether it mentioned characters, objects, space, time, goals, or causes. There was evidence for both incremental and global updating: Readers mentioned situation dimensions more when those dimensions changed, controlling for the onset of a new event. Readers also mentioned situation dimensions more at points when a new event began than during event middles, controlling for the presence of situational change. These results support theories that claim that readers engage in both incremental and global updating during extended narrative comprehension.     

Studies in group decision I: Social space,patterns of communication and group concensus

The discovery of the effects of risky shift focusses the interest on the study of decision processes. Nevertheless the researches carried on until now have always shown confusion between the theoretical and experimental analysis of these processes and the risk-related behavior. In the first part of the article the authors try to clear this confusion as well as to define the conditions of a systematic study of the mechanisms of decision leading either to an averaging or to a polarization of individual views. The authors insist on the necessity to compare groups rather than individuals to groups. To start with, one hypothesis concerning the effects of group organization on the degree of polarization of views is proposed. The experiment described in the second part of the article confirms the hypothesis: A group in which individuals have the possibility to communicate with each other and to interact directly take more extreme decisions than a group deprived of this possibility. It is presumptuous and inexact to state that groups take more extreme risk than individuals whereas it is right to say that certain groups take risks when circumstances are favorable.     

Gender and Social Loafing in Japan

Abstract

The author investigated gender differences in social loafing among 18 men and 18 women in Japan. The participants were divided into groups of 9 members. Ropes were connected to strongly built steel frames set near the ceiling of the laboratory. Each participant had to pull the rope as through arm wrestling. The participants engaged in 12 trials—2 individual trials and 10 group trials. In the group trials, the participants believed that only the group's power, but not individual participants' power, was being gauged. The difference between the data from individual trials and the data from group trials was adopted as a measure of social loafing. The women tended to loaf less than the men, and the men's effort suddenly declined when the situation was changed from an individual to a collective work setting. However, the women did not show that change. The author interpreted the findings from the viewpoint of gender difference in the quality of achievement motivation among Japanese participants.