The illusion of group productivity: a reduction of failures explanation

It has consistently been found that people produce more ideas when working alone as compared to when working in a group. Yet, people generally believe that group brainstorming is more effective than individual brainstorming. Further, group members are more satisfied with their performance than individuals, whereas they have generated fewer ideas. We argue that this ‘illusion of group productivity’ is partly due to a reduction of cognitive failures (instances in which someone is unable to generate ideas) in a group setting. Three studies support that explanation, showing that: (1) group interaction leads to a reduction of experienced failures and that failures mediate the effect of setting on satisfaction; and (2) manipulations that affect failures also affect satisfaction ratings. Implications for group work are discussed. Copyright © 2005 John Wiley & Sons, Ltd.     

Investigating Web‐Based Recruitment Sources: Employee testimonials vs word‐of‐mouse

Although the internet has dramatically changed recruitment practices, many web‐based recruitment sources have not yet been investigated. The present study examines the effects of web‐based employee testimonials and web‐based word‐of‐mouth (i.e., ‘word‐of‐mouse’) on organizational attraction. The source credibility framework is used to compare these company‐dependent and company‐independent recruitment sources. In a sample of potential applicants for a head nurse position, word‐of‐mouse was associated with higher organizational attractiveness than web‐based employee testimonials. However, potential applicants were more attracted when testimonials provided information about individual employees than about the organization. Conversely, word‐of‐mouse was associated with higher organizational attractiveness and more organizational pursuit behavior when it focused on the organization instead of on employees. Most of these effects were mediated by credibility perceptions.     

Competing tasks as an index of intelligence

Most studies involving competing (or dual) tasks have been concerned with the investigation of models of attention and have stressed the importance of task characteristics in determining competing-task performance. The relatively few studies which have looked at individual differences in competing-task performance suggest that measures of this performance could reflect operations which are central to cognitive functioning. This paper examines two key questions which stem from this research: is there a separate ability involved in competing-task performance? Is competing-task performance more indicative of general intellectual functioning?A battery composed of both single and competing tasks was presented to 91 Ss. Two sets of scores, ‘primary’ and ‘secondary’, were obtained from the competing tasks. The results indicate that ‘single’ and ‘primary’ scores are basically measuring the same thing but that ‘secondary’ scores measure what is perhaps a time-sharing factor. There is also some evidence that primary and secondary scores are more indicative of the general factor, as measured by this battery, than their single counterparts.     

Time of day effects in simple repetitive tasks: Some possible mechanisms

A brief review of the literature, and three experiments, are presented which investigated time of day effects in human performance at simple repetitive tasks (i.e. tasks involving little or no ‘working memory’ load) The goal was to differentiate between a ‘capacity’ based explanation of the effects, concerned with changes in the general rate of information processing, and a ‘strategy’ based one concerned with the amount of information processed at each decision point. The strategy based explanation appeared to be the more suitable, accounting for the surprising heterogeneity in time of day function that was found for such tasks in the literature, and for the results of the three experiments. It would appear that there might be a general tendency for people to become faster but less accurate as the day wears on.     

Source dependence in the valuation of objects

We ran two experiments to test whether people value objects more highly when they obtain those objects due to exemplary performance at a task. In the first, subjects who believed they had obtained a prize due to their performance on a classroom exercise valued it more highly than those who believed they had obtained it by chance. In the second, subjects who obtained a prize due to exemplary performance on a task valued it more highly than those who obtained it due to their poor performance. In both experiments, this ‘source dependence’ effect is approximately equal in strength to the endowment effect, which compares the valuation of subjects with and without the prize. We suggest a possible explanation for this source-dependence effect based on associationism, and rule out two alternative explanations.     

Explanatory Consolidation: From ‘Best’ to ‘Good Enough’

In science and everyday life, we often infer that something is true because it would explain some set of facts better than any other hypothesis we can think of. But what if we have reason to believe that there is a better way to explain these facts that we just haven’t thought of? Wouldn’t that undermine our warrant for believing the best available explanation? Many philosophers have assumed that we can solve such underconsideration problems by stipulating that a hypothesis should not only be ‘the best’ explanation available; rather, it should also be ‘good enough’. Unfortunately, however, the only current suggestion for what it might mean to say that an explanation is ‘good enough’ is, well, not good enough. This paper aims to provide a better account of what is required for an explanatory hypothesis to be considered ‘good enough’. In brief, the account holds that a ‘good enough’ hypothesis is one that has gone through a process that I call explanatory consolidation, in which accumulating evidence and failed attempts to formulate better alternatives gradually make it more plausible that the explanation we currently have is better than any other that could be formulated.     

How current feedback and chronic effectiveness influence motivation: everything to gain versus everything to lose

We found that the effects on subsequent motivation of success and failure feedback are moderated by the extent to which individuals have been previously successful in promotion self‐ regulation (achieving their ideals) and prevention self‐ regulation (meeting their oughts). Specifically, we found that the more individuals are ideal congruent, the more their performance increases over time following success than failure feedback, whereas the more individuals are ought congruent, the more their performance increases over time following failure than success feedback. These findings have implications for research on the effects of feedback on motivation, as well as for the motivational significance of the expressions, ‘everything to gain’ and ‘everything to lose’. Copyright © 2000 John Wiley & Sons, Ltd.     

There is an ‘I’ in truth: How salient identities shape dynamic perceptions of truth

This research examined the hypothesis that people judge as true those claims aligned with the normative content of their salient social identities. In Experiment 1a, participants’ social identities were manipulated by assigning them to ‘inductive-thinker’ and ‘intuitive-thinker’ groups. Participants subsequently made truth judgements about aphorisms randomly associated with ‘science’ and ‘popular wisdom’. Those with salient inductive-thinker social identities judged science-based claims as more truthful than popular wisdom-based claims to a greater extent than those with salient intuitive-thinker social identities. Experiment 1b was a preregistered replication, with additional conditions eliminating an alternative semantic-priming explanation. In Experiment 2, American Conservatives and Liberals judged as more true claims associated with the ideological content of their social identities. This difference was attenuated through a manipulation that framed participants as more moderate than they had originally indicated. Overall, these experiments suggest an identity-truth malleability, such that making salient specific social identities can lead to related perceptions of truth normatively aligned with those identities.     

过度自信的跨文化差异

过度自信是指个体过高地估计自身判断的精确度,其经典的研究范式是常识问题及常识问题的变式现实情境问题。使用常识问题的研究一致发现,东方人显著比西方人更过度自信;使用现实情景问题的研究则发现,西方人比东方人更过度自信或两者无显著性差异。对“东方人比西方人过度自信”的解释包括认知习惯和教育系统两种主流观点。最后对出现不同研究结果的原因进行讨论,并进一步探讨解释的有效性和“西方人比东方人过度自信”的原因。     

样例类型与解释方式对初中生数学概率问题解决的效果

为考察样例类型与解释方式对初中生数学概率问题解决的促进作用,实验1随机选取初中生90名,比较正确样例组、正误样例组、对照组的学习效果,实验2随机选取另外90名初中生,比较有教学解释、有自我解释与无解释的正误样例组的即时与延时测试学习效果,研究发现:(1)正误样例学习效果显著好于正确样例;(2)有解释的正误样例学习效果显著好于无解释的正误样例;(3)与有教学解释的正误样例学习效果相比,有自我解释的正误样例学习效果显著且更持久。     

Disability: An Embodied Reality (or Space) of Dasein

The ‘body’ has remained the pivotal and essential mechanism for analysis within disability scholarship. Yet while historically conceptualized as an individual’s fundamental feature, the ‘disabled identity’ has been more recently explained as a function of ‘normalcy’ through social, cultural political, and legal discriminations against difference and deviancy. Disability studies’ established tradition of consultation with philosophical endeavour remains apparently unwilling to exploit or utilize Martin Heidegger’s understanding of ‘Being’ and interpretation of Dasein as a possible framework for unravelling the complexities of contemporary discrimination and oppression of those others. This paper in tracing Heidegger’s explanation of humankind, inspired by arguments proposed by Cerbone (Int J Philos Stud 2:209–230, 2000) and in consultation with Levin (The body: classic and contemporary readings, Blackwell, Malden, 1999), Aho (2009), Malpas (Heidegger’s topology: being place, world, MIT Press, Cambridge, 2008), and Rae (Hum Stud 33:23–39, 2010) among others, will interpret the ‘embodied’ reality of ‘Being,’ of being-disabled-in-the-world as primarily involved within the practical context and structured according to impersonal, normative social norms, rather than detached, theoretical contemplation or observance.     

Direct and indirect influence in the Asch paradigm: Effects of ‘valid’ or ‘denied’ information

In an experiment using the Asch paradigm, a source whose response was ‘denied’ (source younger than subjects, in an experiment context implying the development of visual acuity) was found to have less direct influence than a ‘validated’ source (older or same age as subjects), tending to specialize in a pattern of influence similar to the so-called conversion phenomenon (i.e. direct influence only).     

Attribution in conversational context: Effect of mutual knowledge on explanation-giving

Attribution theorists typically have conceived the attribution process in terms of universal laws of cognitive functioning, independent of social interaction. In this paper we argue for the notion, grounded in recent ordinary language philosophy, that any consideration of the form of everyday explanation must take into account its function as an answer to a ‘why’ question within a conversational framework. Experiment 1 provides support for the idea that speakers should identify as causally relevant that necessary condition for the occurrence of an event about which the enquirer is ignorant. Experiment 2 replicates this basic finding and further demonstrates that speakers will change their explanations to enquirers believed to be sharing different knowledge about the same target event. Experiment 2 also assessed the role of individual differences in conversational rule-following, and found in apparent contrast some previous predictions that high self-monitoring individuals were no more likely than lows to tailor their explanations to suit the enquirer's knowledge state. If anything, the reverse occurred. Taken together, these experiments support the central contention of the abnormal conditions focus model (Hilton and Slugoski, 1986), that the common sense criterion of causality is that of an ‘abnormal condition’ rather than constant conjunction as instantiated in the ANOVA model of causal attribution (Kelley, 1967, 1973).     

The optimal impact phenomenon: beyond the third person effect

According to the third person hypothesis, people believe that the media have a greater effect on other people's attitudes and behaviours than on their own attitudes and behaviours. A self-enhancement explanation for the third person effect was tested, stating that people perceive their own responses to the media not as weaker but as more appropriate than other people's responses. Subjects rated the relative attitudinal impact of messages that are generally considered to be desirable to be influenced by and of messages that are generally considered undesirable to be influenced by on themselves as compared to the average peer. Both attitudinal impact in the direction advocated by the message and in the opposite direction was rated. A ‘classic’ third person effect was obtained in those cases in which attitudinal media impact was considered undesirable only. In cases in which attitudinal media impact was considered desirable a ‘reversed’ third person effect occurred, thus supporting the self-enhancement explanation and suggesting a reconceptualization of the third person effect in terms of an ‘optimal impact phenomenon’.     

Meadow voles, Microtus pennsylvanicus, can distinguish more over-marks from fewer over-marks

Is it possible that voles have a sense of number? To address this question, we determined whether voles discriminate between two different scent-marking individuals and identify the individual whose scent marks was on top more often than the other individual. We tested whether voles show a preference for the individual whose scent marks was on top most often. If so, the simplest explanation was that voles can make a relative size judgement—such as distinguishing an area containing more of one individual’s over-marks as compared to less of another individual’s over-marks. We found that voles respond preferentially to the donor that provided a greater number of over-marks as compared to the donor that provided a lesser number of over-marks. Thus, we concluded that voles might display the capacity for relative numerousness. Interestingly, female voles were better able than male voles to distinguish between small differences in the relative number of over-marks by the two scent donors.     

Context and rule manipulations on the Wason selection task

‘Food and drinks’ is a thematic content known not to produce differential performance to abstract content on the Wason selection task. To examine the effects of context on problem responses, this content was set in a ‘diet’ context, predicted to produce differential performance, and this context was compared both with the ‘food and drinks’ presentation previously used and with abstract content. Additionally, both conditional and universal rules were used, producing six cells to the design, 12 subjects being tested in each cell. Results revealed a significant difference between the rules (in the form a rule by content interaction), content having a significant effect only when the conditional rules were used. For these rules, subjects made significantly more correct solutions in the diet condition than in the abstract condition, whereas there was no evidence of differential performance between the (other) thematic and the abstract condition. Although it is admitted that no satisfactory explanation of the rule differences seems apparent, the effect of context observed is encouraging for this line of research. It is concluded that, as subjects are shown to be capable of coding the general idea of a counter-example into relevant specific selections, they are quite capable of solving the task, but that they fail to do so unless the solution is cued by, and its outcome would be consistent with, their pre-existing belief structures.     

Köhler rediscovered: The anti-ringelmann effect

A current focus of research on individual versus group performance is social loafing, the decrease in individual effort that occurs when the individual works within a cooperative group rather than alone. This result is also referred to as the ‘Ringelmann effect’. But what has been ignored until now is the increment in group performance through systematic variation of individual performance rates within the group, although this effect was reported by Moede (1927) in the same article which influenced research on the Ringlemann effect. Within a narrow range of performance rates from 4.5 to 3.5 in dyads Kohler found an increase in group performance to a level above that of the individual performances. Kohler obtained comparable results from 3–person, and 4–person groups using the experimental procedure of weight lifting and winch turning. This phenomenon should be called the ‘Kohler effect’; although it is still to be replicated with modern ergometers.     

Frontal lobe functions and personality in mentally abnormal offenders

This study addresses the recent controversy regarding frontal lobe deficits in psychopaths (Gorenstein, 1982; Hare, 1984) and more generally the question of a relationship between psychopathy as variously attributed (by legal criteria, by clinical-behavioural criteria, and by psychometric criteria) and performance on a task used in the assessment of frontal lobe function, Nelson's Modified Wisconsin Card Sorting Test (MWCST). Two samples of Special Hospital patients were tested as well as a small group of normal healthy volunteers. Patients classified legally as suffering from a ‘Psychopathic Disorder’ did not differ on MWCST measures from patients classified legally as ‘Mentally Ill’. There were no differences on performance measures comparing patients assessed as ‘high’ or ‘low’ on Hare's Psychopathy Checklist. Comparison between psychometrically derived patient groups corresponding to Blackburn's (1974) ‘primary’ and ‘secondary’ psychopathic types yielded statistically significant results: ‘secondary’ psychopaths showed significantly more total errors and achieved significantly fewer categories than did ‘primary’ psychopaths and controls. This suggests that the discrepancy between Gorenstein's (1982) and Hare's (1984) results can parsimoniously be explained by their use of different selection criteria to select their ‘psychopaths’. However, it is suggested that performance deficits on the MWCST such as were obtained in ‘secondary’ psychopaths are not a correlate of ‘psychopathy’ (however defined), but rather reflect an inability to maintain set resulting from an over-appraisal of threat on the part of the anxious, socially withdrawn individual.     

Impact and Causes of Rater Severity/Leniency in Appraisals without Postevaluation Communication Between Raters and Ratees

In performance appraisals, some assessors are substantially more lenient than others. Research on this effect in appraisals involving communication and interaction between raters and ratees after the performance evaluation has taken place indicates that it may be at least partly caused by individual differences in assessor personality. However, little is known about the impact or causes of rater severity versus leniency in situations in which there is little or no contact between raters and ratees after the performance evaluation. In Study 1 (N = 174) the strength of the severity–leniency effect in this ‘no‐contact’ context is estimated and found to be similar to that reported for ‘with‐contact’ appraisals. No evidence of an association between assessor personality and assessor severity (vs. leniency) is found in the ‘no‐contact’ context. In Study 2 (N = 54) there is no evidence of an association between the fluid cognitive ability of assessors and the severity of their ratings in a no‐contact context. It is concluded that the severity versus leniency effect probably has a considerable impact on performance ratings in ‘no‐contact’ appraisal settings, but that neither rater personality nor rater cognitive ability appear to play a significant role in this.     

Desire for Control and the Use of Attribution Processes

ABSTRACT The hypothesis that people engage in attribution processes to obtain a sense of control was tested In each of three experiments, subjects identified on an individual difference measure as high in a general desire for control (DC) were found to engage in attnbution processes more than subjects low in desire for control In Experiment 1, high-DC subjects were more likely to utilize attributionally relevant information when describing the cause of a writer's behavior than were low-DC subjects High-DC subjects in Experiment 2 were more likely to ask attribution questions about hypothetical events than were low-DC subjects In Expenment 3, high-DC subjects gave more attributions for their performance on a test than did low-DC subjects The findings are interpreted as support for the control motivation explanation for why people engage in attribution processes