Research note: The accuracy of group majorities for disjunctive and conjunctive decision tasks

For complex group decision tasks which can be described in terms of establishing the truth value of conjunctive (and) or disjunctive (or) composite propositions, the advantage for group judgmental accuracy of disaggregating the decision task into separate individual evaluations of the truth value of each component atomic proposition in the composite is investigated. For true propositions it is shown that disaggregation is preferable for conjunctive tasks, but not for disjunctive tasks; while the reverse is true for false propositions.     

Superstition predicts perception of illusory control

Superstitions are common, yet we have little understanding of the cognitive mechanisms that bring them about. This study used a laboratory‐based analogue for superstitious beliefs that involved people monitoring the relationship between undertaking an action (pressing a button) and an outcome occurring (a light illuminating). The task was arranged such that there was no objective contingency between pressing the button and the light illuminating – the light was just as likely to illuminate whether the button was pressed or not. Nevertheless, most people rated the causal relationship between the button press and the light illuminating to be moderately positive, demonstrating an illusion of causality. This study found that the magnitude of this illusion was predicted by people's level of endorsement of common superstitious beliefs (measured using a novel Superstitious Beliefs Questionnaire), but was not associated with mood variables or their self‐rated locus of control. This observation is consistent with a more general individual difference or bias to overweight conjunctive events over disjunctive events during causal reasoning in those with a propensity for superstitious beliefs.     

Selective social learning in infancy: looking for mechanisms

Although there is mounting evidence that selective social learning begins in infancy, the psychological mechanisms underlying this ability are currently a controversial issue. The purpose of this study is to investigate whether theory of mind abilities and statistical learning skills are related to infants’ selective social learning. Seventy‐seven 18‐month‐olds were first exposed to a reliable or an unreliable speaker and then completed a word learning task, two theory of mind tasks, and a statistical learning task. If domain‐general abilities are linked to selective social learning, then infants who demonstrate superior performance on the statistical learning task should perform better on the selective learning task, that is, should be less likely to learn words from an unreliable speaker. Alternatively, if domain‐specific abilities are involved, then superior performance on theory of mind tasks should be related to selective learning performance. Findings revealed that, as expected, infants were more likely to learn a novel word from a reliable speaker. Importantly, infants who passed a theory of mind task assessing knowledge attribution were significantly less likely to learn a novel word from an unreliable speaker compared to infants who failed this task. No such effect was observed for the other tasks. These results suggest that infants who possess superior social‐cognitive abilities are more apt to reject an unreliable speaker as informant. A video abstract of this article can be viewed at: https://youtu.be/zuuCniHYzqo     

基于假设检验的项目相合性指标研究

在认知诊断评估中,评价认知模型与作答数据的拟合非常重要。已有的层级相合性指标(HCI)仅能用于评价连接规则下模型与数据的拟合情况,有必要研究分离规则下相合性指标。HCI假设某项目上正确作答,便推断其子项目上的错误作答为失拟。由于作答反应的随机性,提出基于假设检验的项目相合性指标。该指标可用于区分连接规则和分离规则的作答数据、评价Q矩阵质量和衡量作答数据中的噪音、还可为评价认知模型和选择认知诊断模型提供参考。     

Social Indispensability or Social Comparison: The Why and When of Motivation Gains of Inferior Group Members1

In 2 experimental studies, social indispensability and upward social comparison were contrasted as potential triggers of motivation gains of inferior group members. Using a cognitive task in a computer‐supported environment, individual work was compared with conditions that enabled upward comparison only (coaction), or both upward comparison and social indispensability (conjunctive task). Moreover, working conditions (face‐to‐face vs. anonymous) and partner‐related performance feedback (contemporaneously vs. post‐task) were manipulated as potential moderators. Results revealed motivation gains only when partner feedback was contemporaneously available. In this case, upward‐comparison effects could be demonstrated during coaction. However, when participants' contribution determined a group outcome, their motivation was additionally increased, demonstrating social indispensability effects. Finally, motivation gains were generally higher during face‐to‐face compared to anonymous work.     

The effects of funny and serious task content and expectations of fun versus importance on children's cognitive performance

This study investigated how children's performance on a cognitive task was influenced by funny and serious task content, and by fun or important instructions. Eighty‐four children in Grades 1 and 5 performed two versions of a paired‐associates word‐learning task, which paired nonsense words with novel definitions and illustrations. All children completed a version in which the definitions and illustrations were funny, and a version in which they were not, with either fun or important instructions. Results revealed significantly better performance on the funny than on the serious version, but only when the funny version was presented first. There were no significant effects of task instructions. The findings confirm that making children's cognitive tasks funnier can enhance task performance. Although there were no effects of expectations as created by task instructions, the enhancing effect of funny content was influenced by children's expectations as created by their prior experience with the task.     

Team effectiveness: beyond skills and cognitive ability.

On the basis of job analysis results, the validity of using measures of general cognitive ability, job-specific skills, and personality traits jointly at both the individual level and the group level to predict the performance of 79 four-person, human resource work teams was evaluated. Team member trait and job skill scores were aggregated with a conjunctive model of task performance. At the individual level of analysis, measures of personality (i.e., Agreeableness and Conscientiousness) predicted peer ratings of team member performance beyond measures of job-specific skills and general cognitive ability. Similarly, at the group level of analysis, both Agreeableness and Conscientiousness predicted supervisor ratings of work team performance, objective measures of work team accuracy, and work completed. At both the individual and group levels, the trait of Agreeableness predicted Interpersonal Skills.     

The predictive validity of self-efficacy in training performance: little more than past performance

Past research on the influence of self-efficacy in training has provided mixed results. Key differences between studies pertain to whether past performance is operationalized as a residual variable or as an unadjusted variable and to the type of task used. In this study, the authors conducted and performed a reanalysis to examine the influence of self-efficacy using both operationalizations of past performance in 2 experimental tasks. Results indicate that, regardless of task version or type, self-efficacy predicted performance only when a residual measure of past performance was used, but not when past performance was unadjusted. However, when past performance was adjusted, the findings for self-efficacy were likely a statistical artifact. These results suggest that self-efficacy is a consequence rather than a cause of performance in training.     

The elusive matching bias effect in the disjunctive selection task

When reasoning with conditional statements (i.e., if [not] p then [not] q), for example when solving Wason's selection task, subjects tend to display matching bias: Options which match the entities named in the rule tend to be selected irrespective of whether this is logically appropriate. Recently, there have been suggestions that the underlying causes of matching bias reflect a general phenomenon that applies to many types of logical rule, not just conditionals. A study is reported in which performance is investigated for selection tasks with categorical or disjunctive rules. Although matching bias was clearly present for categorical rules, inverted matching bias was identified for disjunctive rules, calling into question the generality of the phenomenon and its explanations. In addition, performance at one task was not correlated with performance at the other, calling into question recent cognitive capacity accounts of selection task performance.     

Dividing Attention Between Tasks: Testing Whether Explicit Payoff Functions Elicit Optimal Dual‐Task Performance

We test people's ability to optimize performance across two concurrent tasks. Participants performed a number entry task while controlling a randomly moving cursor with a joystick. Participants received explicit feedback on their performance on these tasks in the form of a single combined score. This payoff function was varied between conditions to change the value of one task relative to the other. We found that participants adapted their strategy for interleaving the two tasks, by varying how long they spent on one task before switching to the other, in order to achieve the near maximum payoff available in each condition. In a second experiment, we show that this behavior is learned quickly (within 2–3 min over several discrete trials) and remained stable for as long as the payoff function did not change. The results of this work show that people are adaptive and flexible in how they prioritize and allocate attention in a dual‐task setting. However, it also demonstrates some of the limits regarding people's ability to optimize payoff functions.     

Decision‐making competence: External validation through an individual‐differences approach

This study asks to what extent (a) individuals show consistent performance differences across typical behavioral decision‐making tasks, and (b) how those differences correlate with plausible real‐world correlates of good decision making. Seven tasks, chosen to span the domain of decision‐making skills, were administered to participants in an ongoing longitudinal study providing extensive social, psychological, and behavioral measures. Performance scores on individual tasks generally showed small, positive inter‐task correlations. An aggregate measure of decision‐making competence (DMC) was appropriately correlated with plausible sources, concomitants, and outcomes of good decision making, suggesting the underlying construct's external validity. Higher DMC scores were associated with more intact social environments, more constructive cognitive styles, and fewer ‘maladaptive’ risk behaviors. In each case, DMC adds to the predictive validity of general measures of cognitive ability. These results suggest that poor decision making on common laboratory tasks is related to real‐world antecedents and consequences of poor decision making. Copyright © 2005 John Wiley & Sons, Ltd.     

‘We are the good guys but they are not bad’. In‐group positivity and cognitive performance in preschoolers

The general purpose of this study was to analyse the developmental relations between the early forms of ethnic attitudes, and the classification abilities of the young child. We designed new cognitive tasks within a detection paradigm adapted to preschoolers and attitudinal tasks that were presented as games in a computer screen. Participants were 75 majority‐group children of 3, 4, and 5 years of age. Children's preferences and positive/negative attitudes towards the in‐group (Spaniards) and three out‐groups (Latin‐Americans, Africans, and Asians) were measured. The results showed a remarkable preference and positivity for the in‐group, but not out‐group derogation. Children's cognitive performance, to a greater extent than their age, was positively associated with in‐group favouritism and positivity. On the other hand, we found some interesting differences and developmental changes in children's positive orientation to the out‐groups that are discussed in the last section.     

Effect of instructions on elementary cognitive tasks sensitive to individual differences

The effect of instructions on basic cognitive tasks was investigated. In the first study, 60 college students completed both a choice reaction time and a modified match-to-sample task. Students were given either written, non-verbal, or no instructions. Mean level of performance changed across type of instruction for each task. The correlations between the task parameters and a measure of general intelligence also appeared to change across instructional conditions. A second study was conducted with 464 Air Force and National Guard recruits who completed choice reaction time, match-to-sample, tachistoscopic threshold, and probed recall tasks. Approximately half of these subjects received standard written instructions while the others received no instructions. Mean group differences were substantial but decreased with practice. Patterns of individual differences between the instruction and no-instruction conditions varied more with increased task complexity, with greater change occurring in more complex tasks such as probed recall. In sum, instructions have a significant impact on mean performance on basic cognitive tasks and a lesser effect on individual differences.     

An investigation of cognitive test performance across conditions of silence,background noise and music as a function of neuroticism

The present study investigates the role of trait neuroticism on cognitive performance under distraction. Seventy participants were given a personality test and then undertook a number of different cognitive tasks in silence, in the presence of popular music and in background noise. It was predicted that performance on a general intelligence test, a test of abstract reasoning, and a mental arithmetic task would be adversely affected by background sounds. It was predicted that neuroticism would be negatively correlated with performance on the mental arithmetic task but only when the individuals were working in the presence of background sound. Stable vs. unstable participant's performance on a mental arithmetic task during noise was significantly higher as predicted. The results provided partial support for the hypotheses and are discussed with respect to previous findings in the literature on personality (particularly introversion–extraversion) and distraction on cognitive task performance. Limitations are noted.     

Children's friendships and learning in school: Cognitive enhancement through social interaction?

Background. Recent literature has identified that children's performance on cognitive (or problem‐solving) tasks can be enhanced when undertaken as a joint activity among pairs of pupils. Performance on this ‘social’ activity will require quality relationships between pupils, leading some researchers to argue that friendships are characterized by these quality relationships and, therefore, that friendship grouping should be used more frequently within classrooms. Aims. Children's friendship grouping may appear to be a reasonable basis for cognitive development in classrooms, although there is only inconsistent evidence to support this argument. The inconsistency may be explained by the various bases for friendship, and how friendship is affected by cultural contexts of gender and schooling. This study questions whether classroom‐based friendship pairings will perform consistently better on a cognitive task than acquaintance pairings, taking into account gender, age, and ability level of children. The study also explores the nature of school‐based friendship described by young children. Sample. 72 children were paired to undertake science reasoning tasks (SRTs). Pairings represented friendship (versus acquaintance), sex (male and female pairings), ability (teacher‐assessed high, medium, and low), and age (children in Years 1, 3, and 5 in a primary school). Method. A small‐scale quasi‐experimental design was used to assess (friendship‐ or acquaintance‐based) paired performance on SRTs. Friendship pairs were later interviewed about qualities and activities that characterized their friendships. Results. Girls' friendship pairings were found to perform at the highest SRT levels and boys' friendship pairing performed at the lowest levels. Both boy and girl acquaintance pairings performed at mid‐SRT levels. These findings were consistent across Year (in school) levels and ability levels. Interviews revealed that male and female friendship pairs were likely to participate in different types of activity, with girls being school‐inclusive and boys being school‐exclusive. Conclusion. Recommendations to use friendship as a basis for classroom grouping for cognitive tasks may facilitate performance of some pairings, but may also inhibit the performance of others. This is shown very clearly with regard to gender. Some of the difference in cognitive task performance may be explained by distinct, cultural (and social capital) orientations to friendship activities, with girls integrating school and educational considerations into friendship, and boys excluding school and educational considerations.     

The development of cognitive inhibition in streams-of-consciousness and directed speech

This research examined the development of the ability to inhibit thoughts within free speech by manipulating the content requirements of overt streams-of-consciousness. A picture-naming task with procedural manipulations similar to the stream-of-consciousness task was created as an additional method of investigating the development of the inhibition of speech. Comparison of adults' performance in the two tasks indicated that mature performance reflected inhibitory processing rather than selective attention. The children's performance in the stream-of-consciousness task suggested a developmental change in their ability to produce a stream-of-consciousness overtly. An investigation of inhibition in the picture-naming task with kindergartners, second graders, fifth graders and adults revealed a developmental improvement in inhibitory ability over the middle childhood years. These results are consistent with the interpretation that developmental improvements in cognitive inhibition contribute to developmental improvements in cognitive function on a variety of tasks.     

Individual differences in working memory capacity and enumeration

Two experiments are reported in which subjects performed working memory and enumeration tasks. In the first experiment, subjects scoring low on the working memory task also performed poorly on the attention-demanding "counting" portion of the enumeration task. Yet no span differences were found for the non-attention-demanding "subitizing" portion. In Experiment 2, conjunctive and disjunctive distractors were added to the enumeration task. Although both high and low working memory span subjects were adversely affected by the addition of conjunctive distractors, the effect was much greater for the low-span subjects. Implications from these findings are that differences in working memory capacity correspond to differences in capability for controlled attention.     

Cognitive processes in children's reading and attention: The role of working memory,divided attention,and response inhibition

Children experiencing attention difficulties have documented cognitive deficits in working memory (WM), response inhibition and dual tasks. Recent evidence suggests however that these same cognitive processes are also closely associated with reading acquisition. This paper therefore explores whether these variables predicted attention difficulties or reading among 123 children with and without significant attention problems sampled from the school population. Children were screened using current WM and attention task measures. Three factors explained variance in WM and attention tasks. Response inhibition tasks loaded mainly with central executive measures, but a dual processing task loaded with the visual‐spatial WM measures. Phonological loop measures loaded independently of attention measures. After controls for age, IQ and attention‐group membership, phonological loop and ‘central processing’ measures both predicted reading ability. A ‘visual memory/dual‐task’ factor predicted attention group membership after controls for age, IQ and reading ability. Results thus suggest that some of the processes previously assumed to be predictive of attention problems may reflect processes involved in reading acquisition. Visual memory and dual‐task functioning are, however, purer indices of cognitive difficulty in children experiencing attention problems.     

Personality predicts prospective memory task performance: an adult lifespan study

Do interindividual differences in prospective memory task performance reflect individual differences in personality and lifestyle? Do the cognitive abilities known to change with age retain their power to predict episodic prospective memory task performance after controlling for personality and lifestyle variables, and do personality and lifestyle variables offer predictive power apart from that provided by cognitive ability measures? To answer these questions, we conducted a study with community‐living healthy individuals (n= 141) between 18 and 81 years of age. They completed three different episodic prospective memory tasks – two laboratory tasks and one field task – as well as various measures of personality, lifestyle, and cognitive ability. The results indicated that personality and lifestyle reliably predicted who will succeed and who will fail on all three episodic prospective memory tasks. Conscientiousness predicted performance on two of the prospective memory tasks; socially prescribed perfectionism and neuroticism each predicted performance on one of the prospective memory tasks. Cognitive ability predicted performance on one of the laboratory prospective memory tasks but not on the other two prospective memory tasks. After we controlled for individual differences in personality and lifestyle variables, cognitive ability was no longer able to predict performance on the laboratory prospective memory task. By contrast, controlling for cognitive ability had no influence on the predictive power of the personality and lifestyle variables.     

Attachment and preschool children's understanding of maternal versus non‐maternal psychological states

There is growing evidence that insecurely attached children are less advanced in their social understanding than their secure counterparts. However, attachment may also predict how individual children use their social understanding across different relationships. For instance, the insecure child's social‐cognitive difficulties may be more pronounced when the psychological states of an attachment figure are being considered. In the current study, forty‐eight 4‐ to 5‐year‐old children were asked about their mothers' emotions and false beliefs, as well as those of non‐attachment figures. The Separation Anxiety Test (SAT) was administered to assess children's attachment representations. Children's SAT scores predicted their overall performance on the false belief and causes of emotion tasks, even after controlling for age and verbal ability. More interestingly, however, children with high scores on the Avoidance dimension of the SAT experienced greater difficulty understanding maternal false beliefs relative to those of an unfamiliar adult female. Thus, although attachment insecurity may hinder social‐cognitive development in general, the findings suggest that there are more specific effects as well. Attachment representations that are characterized by high levels of avoidance appear to interfere with children's ability to fully engage their social‐cognitive skills when reasoning about maternal mental states.