The Ringelmann effect: Studies of group size and group performance

Ringelmann's classic finding—that the addition of co-workers in a rope-pulling task leads to a linear decrement in the individual group member's average performance—was reexamined experimentally. Study I attempted to replicate the effect, using groups of subjects ranging in size from 1 to 6. Performance dropped significantly as group size was increased from one individual to two or to three, but the addition of a fourth, fifth, or sixth member produced insignificant additional decrements; thus, the effect was not linear but curvilinear. Study II was designed to examine possible sources of performance loss, separating the factors of “coordination” and “motivation” loss (Steiner, 1972). The possibility of intermember incoordination was eliminated, while motivation loss remained free to vary: Each experimental subject pulled alone, and in “groups” where he believed there were from one to five other members. Once again, individual performance declined significantly with the addition of the first and second perceived co-worker, but then leveled off for perceived group sizes three to six. Some implications are discussed.     

Perceptions of relative group size and group status: Effects on intergroup discrimination in negative evaluations

The positive–negative asymmetry in social discrimination proposes a threshold for ingroup favouritism within the negative domain: in contrast to comparable studies dealing with in- and outgroup evaluations on positive attributes, ingroup favouritism does not occur when negative attributes are used. The present study focuses on two aspects of this threshold: it investigates processes, which may influence the absence of ingroup favouritism in the negative domain, and it tests ‘aggravating’ variables, which seem to be suficient to elicit ingroup favouritism even in the negative domain. Results show that ingroup favouritism occurred within the negative domain when several aggravating conditions were included, namely high salience of size- and status- similarity between groups and high ingroup identification. Furthermore, subjects under minimal conditions tended to overestimate relative size as well as relative status of their ingroup. The perception of group members to belong to a high status majority is interpreted as a sufficient condition counteracting tendencies towards ingroup favouritism within the negative domain.     

Group status,group size and attitude polarization

The influence of group status and group size on intergroup attitude differentiation was investigated. Hypothesized was that members of high status groups would polarize their attitudes more than members of low status group, and that minorities would show greater sensitivity to status differences than majorities. The results show that status affected intergroup differentiation as predicted, while group size did not.     

Effects of gender composition and group status differences on member perceptions of group developmental patterns,effectiveness, and productivity

This field study sought to ascertain whether all female or female dominated work groups, all male or male dominated work groups, and mixed sex work groups varied systematically in member perceptions of group developmental patterns, effectiveness, and productivity. The study also sought to determine whether high versus low status groups differed significantly on these variables. One hundred seventy-one work groups participated in the study. The results suggested that member perceptions of group functioning were more similar than different. Where significant differences were noted, group status, as opposed to gender composition, seemed to account for these differences in perception.     

Boundaries and boundary management in counselling: The never-ending story

The concept of boundary has come into prominence in the field of counselling and psychotherapy in recent years. Its focus has been mainly problem-oriented because much of the thrust has come from concerns about boundary violations in the form of therapist sexual exploitation and abuse of clients. A consequence of this has been a growing caution and conservative stance to boundary management, running the risk of undermining aspects of therapeutic effectiveness. Attention is given to various non-sexual boundary dilemmas in recognition of the ubiquitousness of boundary matters in counselling. Essential therapeutic qualities are examined for their boundary-crossing expectations. Empathy, in particular, is seen as needing to involve boundary crossing, but with important qualifiers. Finally, in response to this process need, boundary management is considered, with the never-ending need for dynamic involvement and applying professional judgements, in contrast to operating rigid rules and adopting any fixed position. As well as arguing a theme, the paper provides an overview of boundary matters, serving as an introduction to the papers that follow in the symposium on boundaries.     

The effect of group status on children's hierarchy-reinforcing beliefs

Members of advantaged groups are more likely than members of disadvantaged groups to think, feel, and behave in ways that reinforce their group's position within the hierarchy. This study examined how children's status within a group-based hierarchy shapes their beliefs about the hierarchy and the groups that comprise it in ways that reinforce the hierarchy. To do this, we randomly assigned children (4–8 years; N = 123; 75 female, 48 male; 21 Asian, 9 Black, 21 Latino/a, 1 Middle-Eastern/North-African, 14 multiracial, 41 White, 16 not-specified) to novel groups that differed in social status (advantaged, disadvantaged, neutral third-party) and assessed their beliefs about the hierarchy. Across five separate assessments, advantaged-group children were more likely to judge the hierarchy to be fair, generalizable, and wrong to challenge and were more likely to hold biased intergroup attitudes and exclude disadvantaged group members. In addition, with age, children in both the advantaged- and disadvantaged-groups became more likely to see membership in their own group as inherited, while at the same time expecting group-relevant behaviors to be determined more by the environment. With age, children also judged the hierarchy to be more unfair and expected the hierarchy to generalize across contexts. These findings provide novel insights into how children's position within hierarchies can contribute to the formation of hierarchy-reinforcing beliefs.

Research Highlights

• A total of 123 4–8-year-olds were assigned to advantaged, disadvantaged, and third-party groups within a hierarchy and were assessed on seven hierarchy-reinforcing beliefs about the hierarchy.
• Advantaged children were more likely to say the hierarchy was fair, generalizable, and wrong to challenge and to hold intergroup biases favoring advantaged group members.
• With age, advantaged- and disadvantaged-group children held more essentialist beliefs about membership in their own group, but not the behaviors associated with their group.
• Results suggest that advantaged group status can shape how children perceive and respond to the hierarchies they are embedded within.

     

Status differences and in-group bias: a meta-analytic examination of the effects of status stability, status legitimacy, and group permeability.

This work examines the moderating effects of status stability, legitimacy, and group permeability on in-group bias among high- and low-status groups. These effects were examined separately for evaluative measures that were relevant as well as irrelevant to the salient status distinctions. The results support social identity theory and show that high-status groups are more biased. The meta-analysis reveals that perceived status stability, legitimacy, and permeability moderate the effects of group status. Also, these variables interacted in their influences on the effect of group status on in-group bias, but this was only true for irrelevant evaluative dimensions. When status was unstable and perceived as illegitimate, low-status groups and high-status groups were equally biased when group boundaries were impermeable, compared with when they were permeable. Implications for social identity theory as well as for intergroup attitudes are discussed.     

The effect of unequal group size on Tukey's HSD procedure

A limitation of the Tukey HSD procedure for multiple comparison has been the requirement of equal number of observations for each group. Three approximation techniques have been suggested when the group sizes are unequal. Each of these techniques was empirically analyzed to determine its effect on TypeI error. Two of the considered variables, average group size and differences in group size, caused differing actual probabilities of TypeI error. One of the three techniques (Kramer's) consistently provided actual probabilities in close agreement with corresponding nominal probabilities.     

Help yourself by helping others: The joint impact of group member organizational citizenship behaviors and group cohesiveness on group member objective task performance change

This paper examines how a group member's individual‐targeted citizenship behavior (OCBI) and organization‐targeted citizenship behavior (OCBO) interact with a salient group‐level contextual variable, group cohesiveness, to foster positive change for that group member, starting with job self‐efficacy change, and followed by objective task performance change. Over a span of 6 months, we engaged in multilevel, multisource, multistage data collection and surveyed 587 members in 83 work groups. Our results indicate that a group member's OCBI, in comparison with OCBO, is more positively related to his or her job self‐efficacy change. Group cohesiveness was found to attenuate the relationship between a group member's OCBI and job self‐efficacy change, and conversely, to accentuate the relationship between a group member's OCBO and job self‐efficacy change. Furthermore, a group member's job self‐efficacy change mediated the interactive effects of the group member's OCBI and group cohesiveness (as well as the group member's OCBO and group cohesiveness) on his or her objective task performance change.     

Differential processing of ingroup and outgroup information: the role of relative group status in permeable boundary groups

Perceivers individuate cognitively the ingroup more than the outgroup; that is, perceivers use person categories to process information about the ingroup, but use stereotypic attribute categories to process information about the outgroup. This phenomenon is labelled the differential processing effect (DPE). Is the DPE moderated by relative group status? In two experiments, either high- or low-status members of permeable-boundary groups (i.e. groups that encourage upward mobility) read through information about unfamiliar ingroup and outgroup members. Relative group status moderated the DPE. Clustering indices in recall and confusions in a name-matching task indicated that high-status members individuated the ingroup more than the outgroup, thus replicating the DPE. However, low-status members individuated the outgroup more than the ingroup, thus reversing the DPE. A third experiment suggested that these findings are predicated on the ingroup information being stereotype-consistent. © 1997 John Wiley & Sons, Ltd.     

A group size effect on personal risk judgments: implications for unrealistic optimism

In Experiments 1 and 2, college students (N = 32 and N = 18, respectively) read heart attack risk profiles (i.e., lists of risk factors) for each of several employees at a series of fictional companies and judged the heart attack risk of the typical employee at each company. In both experiments, subjects' risk judgments increased as a function of the number of employees at the companies. In Experiments 3A and 3B, college students (N = 56 and N = 33, respectively) judged the heart attack risk of the typical employee at a company and also judged the risk of each individual employee. In these experiments, the typical employee was generally judged to be at higher risk than the individual employees. This group size effect might help to explain unrealistic optimism--people's tendency to judge themselves to be at lower risk than their peers for negative life events. Furthermore, it can be modeled successfully within Fiedler's (1996) BIAS framework.     

The effect of target group size on risk judgments and comparative optimism: the more, the riskier

In 5 experiments, college students exhibited a group size effect on risk judgments. As the number of individuals in a target group increased, so did participants' judgments of the risk of the average member of the group for a variety of negative life events. This happened regardless of whether the stimuli consisted of photographs of real peers or stick-figure representations of peers. As a result, the degree to which participants exhibited comparative optimism (i.e., judged themselves to be at lower risk than their peers) also increased as the size of the comparison group increased. These results suggest that the typical comparative optimism effect reported so often in the literature might be, at least in part, a group size effect. Additional results include a group size effect on judgments of the likelihood that the average group member will experience positive and neutral events and a group size effect on perceptual judgments of the heights of stick figures. These latter results, in particular, support the existence of a simple, general cognitive mechanism that integrates stimulus numerosity into quantitative judgments about that stimulus.     

Effects of boundary height and horizontal size within boundary on perceived enclosure

The permeability theory of environmental design predicts that perceived enclosure will be more strongly related to boundary properties such as height as opposed to the size of a horizontal area within a boundary. An experiment on perceived enclosure, provided by 24 participants on 12 spaces in a park, indicated that enclosure correlated at .85 with boundary height and -.60 with horizontal area. These results were as predicted by permeability theory.     

The effects of member expertise on group decision-making and performance

This study assesses the effects of member expertise on group decision-making and group performance. Three-person cooperative groups and three independent individuals solved either an easy or moderately difficult version of the deductive logic game Mastermind. Experimental groups were given veridical performance information, i.e., the members' rankings on prior individual administrations of the task. Control groups were not provided with this information. Results supported the predictions of this study: (1) groups gave more weight to the input of their highest performing members with the group decision-making process being best approximated by post hoc “expert weighted” social decision schemes and (2) groups performed at the level of the best of an equivalent number of individuals.     

组织成员地位的形成及影响机制

组织成员地位通常是指组织内个体受组织其他成员尊重和钦佩的程度,是近些年备受关注的一个心理学构念。虽然组织成员地位与权力、阶层、面子、基于组织的自尊等概念具有一定的关联性,但它们之间存在着明显的界限。组织成员地位主要受到外在显性因素(形体特征、人口统计特征)、内在心理因素(人格、认知、情绪、行为)以及神经生理因素(睾酮激素、皮质醇激素)的影响,并能够对组织成员的认知、情绪、行为和绩效产生显著的影响。未来研究应当进一步区分组织成员地位的维度,探索组织成员地位的生物学基础和文化差异,关注组织成员地位的动态演化及其后果,并检验团队和组织层面地位分布的作用机制。