The tale is in the tail: an alternative hypothesis for psychophysical performance variability in dyslexia

Dyslexic groups have been reported to display poorer mean performance than groups of normal readers on a variety of psychophysical tasks. However, inspection of the distribution of individual scores for each group typically reveals that the majority of dyslexic observers actually perform within the normal range. Differences between group means often reflect the influence of a small number of dyslexic individuals who perform very poorly. While such findings are typically interpreted as evidence for specific perceptual deficiencies in dyslexia, caution in this approach is necessary. In this study we examined how general difficulties with task completion might manifest themselves in group psychophysical studies. Simulations of the effect of errant or inattentive trials on performance produced patterns of variability similar to those seen in dyslexic groups. Additionally, predicted relationships between the relative variability in dyslexic and control groups, and the magnitude of group differences bore close resemblance to the outcomes of a meta-analysis of empirical studies. These results suggest that general, nonsensory difficulties may underlie the poor performance of dyslexic groups on many psychophysical tasks. Implications and recommendations for future research are discussed.     

Asymmetric Explanations of Group Differences: Experimental Evidence of Foucault’s Disciplinary Power

Whilst the same group differences can be explained in many ways, explanations of group differences tend to spontaneously figure the distinctive attributes of lower‐status groups against a background norm of high‐status groups’ attributes. We suggest that this asymmetry occurs in the explanations of scientists and laypeople who have been influenced by the history of ‘disciplinary power’ which works to disempower lower‐status people by making them visible to the human sciences. We argue that social groups who are habitually studied first in research programs, more commonly encountered social groups, and prototypical social groups are all less likely than their counterparts to be marked in spontaneous explanations of empirical group differences. We present evidence that groups who are explicitly mentioned in such explanations are assumed to be lower in power. We describe some limitations to current knowledge about such asymmetric explanations and suggest some directions for further research, including our thoughts about how to integrate existing findings with the possibility of formulating cognitive alternatives to the status quo among minority groups.     

Male-female differences in occupational attitudes within minority groups

Few studies have considered sex differences in occupational attutudes in minority group samples. Evidence of interracial differences in occupational attitudes, coupled with probably interracial differences in socialization processes, suggests that patterns of sex differences in occupational attitudes may not be invariant across races. Any such variations could contaminate interracial comparisons within sexes. The current study examined sex differences in occupational attitudes in two samples of poor minority group members. Differences regularly isolated in studies of whites were not evident. In both samples, rankings of preferences for work-related outcomes of males and females were remarkably similar.     

AN ALTERNATIVE EXPLANATION FOR THE ASYMMETRICAL EFFECTS IN RELATIONAL DEMOGRAPHY RESEARCH

Several relational demography studies have demonstrated asymmetrical effects of dissimilarity across different groups of employees. Some groups of employees appear to be more influenced by differences from fellow employees, whereas other groups of employees appear indifferent. Although numerous theoretical explanations have been developed to account for these asymmetrical effects, this paper argues that such effects are actually methodological artifacts resulting from an imbalance in the proportion of group members and deficiencies in the most commonly used measure of dissimilarity, Euclidean distance. This paper illustrates how such asymmetrical effects can be observed even when none exist in the population. Suggestions for methodological improvements in future diversity research are discussed along with recommendations for managing diversity in organizations.     

Eyewitness Testimony: The Effects of Discussion on Recall Accuracy and Agreement

While some previous research has suggested that group discussion may facilitate eyewitness accuracy, other research has drawn attention to the potential dangers of such discussion. The present studies examine this controversy and the interaction between accuracy and agreement following group discussion. It was found that individuals tend to agree in their testimony following group discussion, and are liable to change their original replies to bring themselves into agreement with group leaders' recall. A second experiment focused upon the actual items which witnesses agreed on following discussion. Changing the mode of questioning from interrogative to narrative eliminated differences in magnitude of agreement between discussion and no-discussion groups. As narrative recall leads to reporting of "easy" items, it was suggested that only certain "difficult" items are susceptible to discussion effects. The need for caution regarding the reliance on testimony following witness discussion was stressed.     

Beyond Idea Generation: The Power of Groups in Developing Ideas

Brainstorming research has claimed that individuals are more creative than groups. However, these conclusions are largely based on measuring creativity by the number of ideas generated, and researchers have tended to neglect other important components of creativity, such as the quality of developed ideas. These studies aim to address this gap in the literature and investigate how well individuals and groups develop ideas. The first study compared collaborative groups, nominal groups (i.e., groups composed of individuals working separately), and individuals on developing an original design for a language-learning game. No differences were revealed between conditions on the game ratings. In the second study, one idea was preselected and given to the participants for further development. Groups received higher ratings in the marketability and overall categories than both nominal groups and individuals, and higher ratings in the fun category than individuals. The qualitative data showed that groups discussed a wider range of topics and topics related to marketability more than individuals did. Thus it appears that there are benefits to developing ideas in a collaborative group rather than individually. Possible explanations for the present findings are explored.     

Memory development in Libyan and Dutch school children

Cross-cultural similarities and differences in memory were examined in two studies with Libyan and Dutch school children of two different grades. The first study analysed effects of word length and pronunciation speed on recall. Baddeley's phonological loop hypothesis could fully account for the somewhat larger digit span of the Dutch children. The second study investigated effects of rehearsal training on recall. Experimental groups showed a higher performance increase after training than did control groups; Libyan children with the same pretest scores as Dutch children showed higher posttest scores, which could be a consequence of sample differences in age or test-wiseness. The studies demonstrated that current theories provide more precise explanations of cross-cultural differences in structural memory features than in control processes. Implications for instructional practice are discussed.     

Immediate and delayed recognition of visual stimuli in poor and normal readers.

The present study investigated the hypothesis that specific reading disability is attributable to inadequate visual memory. Previous research had demonstrated that poor readers sustain no basic dysfunction in visual perception, but there was need to evaluate the possibility that deficiencies in letter and word recognition result from disorder in long-term visual storage. Adopting a format employed in a previous study, randomly arranged Hebrew letters were presented to poor and normal readers unfamiliar with Hebrew, and both groups were asked to demonstrate retention for these stimuli on three separate occasions: immediately after initial presentation, 24 hours later and 6 months later. As a control measure, the performance of the non-Hebrew subjects was compared with that of normal readers familiar with Hebrew letters. It was found that retention in the non-Hebrew groups was equivalent under all of the temporal conditions, but the performance of both was poorer than the Hebrew groups under the immediate and 24-hour conditions. However, none of the reader groups differed in the case of retention after a 6-month delay period. It was concluded that deficient visual memory is an unlikely source of specific reading disability, and alternative explanations of the disorder were considered.     

Impression management in the forced compliance situation: Two studies using the bogus pipeline

Two studies were performed to assess the interpersonal concerns of subjects in the forced compliance paradigm. The first study counterposed dissonance and impression management theory predictions in a 2 × 2 design by varying the public versus private nature of the counterattitudinal behavior and by assessing attitudes with the usual pencil-and-paper method or with a bogus pipeline technique designed to create strong pressures toward sincere reporting. Attitude change occurred only in the Public/Pencil-and-Paper condition and thus supported an interpersonal or impression management interpretation. The second study examined the effect of measuring the critical attitude a second time in the mode not experienced in the first assessment. This three-group design (Pencil-and-Paper/Bogus Pipeline, Bogus Pipeline/Pencil-and-Paper, Control) demonstrated that attitude change occurred only in the Pencil-and-Paper/Bogus Pipeline condition and was maintained on the second assessment when measured by the bogus pipeline. A common-factor analysis of the secondary measures in the second study demonstrated that the Pencil-and-Paper/Bogus Pipeline subjects reported a great deal of negative arousal such as embarrassment and guilt, while the subjects in the Bogus Pipeline/Pencil-and-Paper condition reported feeling manipulated and constrained. The findings of both studies were interpreted as consistent with impression management theory.     

Aging and Remote Memory Declines: Preliminary Findings

Relatively little research has examined the effect of aging upon remote memory, especially among individuals who have entered their 10th decade of life. The present study examined whether remote memory deteriorates in a group of 132 neurologically normal men and women ranging in age from 50 to 97. Remote memory was measured with a modification of the Presidents Test. The data revealed that higher levels of education corresponded with better remote memory. Additionally, age-related differences in memory occurred only in men, with those aged 90 years and older showing significantly worse remote memory than other age groups. Potential explanations and implications of these data are delineated.     

Can group differences in hemispheric asymmetry be inferred from behavioral laterality indices?

A large and often contradictory literature purports to demonstrate different patterns—or at least different degrees—of hemispheric specialization across various groups of people. Schizophrenics, dyslexies, stutterers, musicians, Orientals, Jews, and many other groups have been alleged to display idiosyncratic laterality patterns. An examination of this literature reveals three important problems. First the groups concerned are rarely homogeneous. This makes it difficult to know which group characteristics, if any, are responsible for the observed differences. Second, most behavioral laterality indices are of low reliability making group differences highly unstable. Third, the validity of many behavioral laterality indices has not been substantiated. Because of these problems, it is concluded that caution should be exercised in using and interpreting laterality measures to make between-group comparisons. For now at least, group differences in laterality cannot be inferred.     

Recruiting source effects: A test of two alternative explanations

This field study examined two alternative explanations for recruitment source effects which have been consistently reported in previous studies. For this sample of 98 social service workers, the ‘ realism’ explanation for source differences received more empirical support than the ‘ individual difference ’ explanation. Employee referrals were found to have more realistic expectations than individuals who responded to newspaper ads or directly applied to the organization. In addition, recruitment source was found to be related to employee performance and involuntary turnover. The authors suggest an, as yet, unexamined individual difference variable (motivation) as a possible explanation for the unexpected performance findings.     

Distraction and social comparison as mediators of social facilitation effects

Sanders and Baron (Journal of Personality and Social Psychology, 1975, 32, 956–963) suggested that increases in drive produced by the presence of others (social facilitation) are due to the tendency for others to distract task performers as they worked on a task. This Distraction-Conflict theory proposes that socially mediated drive induction will occur whenever there is some reason to shift attention from the task to the social stimuli. In the case of humans, one such reason may be the opportunity to obtain social comparison information from an audience or coactors. The present research demonstrated that social facilitation effects (improved simple task performance and impaired complex task performance produced by the presence of others) occurred only when subjects were motivated to obtain comparison information (Experiment I) and when comparison information was available (Experiment II). The availability of comparison information also led to increased accuracy in estimating the coactor's performance. This indicated that in conditions manifesting social facilitation, subjects were spending some time monitoring the coactor's work, which is an inherently distracting activity. Several supplementary measures of distraction were generally consistent in indicating greater distraction under conditions manifesting social facilitation. The present results offer no support for the explanations of social facilitation suggested by Zajonc and by Cottrell.     

Why some groups just feel better: the regulatory fit of group power

The current research applied the regulatory fit hypothesis (E. T. Higgins, 2000) to the evaluation of groups, suggesting that individuals' group appraisal depends on how well the groups fit their regulatory needs. Specifically, it was predicted that higher power groups would fit and be more valued by those individuals with a promotion focus because these groups provide a better opportunity to sustain nurturance and achievement needs. Alternatively, lower power groups were predicted to fit and be more valued by those individuals with a prevention focus because these groups necessitate (and thus sustain) a focus on safety and security. Five studies found support for these predictions by both assessing and manipulating regulatory focus and group power and by using explicit and implicit measures of group attraction. Moreover, these regulatory fit effects occurred specifically for group power and not for general differences in group status.     

The values and value stability of emotionally handicapped and normal adolescents

This study addresses two basic questions: (1) Do the value rankings of conduct-disorder, anxiety-withdrawal, and normal adolescents differ? (2) Are the value rankings of the two groups of emotionally handicapped adolescents less stable than the value rankings of the normal group? Value stability was viewed in relation to the broader concepts of identity and psychopathology. While a number of studies have examined value differences among different groups of adolescents, few studies have examined the value stability of adolescents. A total of 148 15- to 18-year-old adolescents were administered the Rokeach Value Survey on two separate occasions (3-week interval) to measure value differences and value stability. The two groups of emotionally handicapped adolescents were classified using the Revised Behavior Problem Checklist. Results revealed that all three groups shared similar values; very few value differences across groups were found on both testings. All three groups shared moderate to low levels of value stability. The findings suggest that both types of emotionally handicapped adolescents are similar to normal adolescents in their stated values and the stability of those values. Results are discussed in terms of possible explanations of the findings, and implications for those who work with adolescents and for future research on adolescent values.     

Career development of special populations: A framework for research

In view of the recent interest in the career behaviors of diverse groups of individuals, this article presents a model for conducting research on the career development of special populations. Available research paradigms are reviewed in terms of their potential impact on such efforts. An alternative framework, designed to make maximum use of available data sources while minimizing potential theoretical bias, is offered. An illustration of research conducted within the recommended framework is presented in which the impact of a variety of career-related variables on the attitudinal and cognitive aspects of vocational maturity is examined from the perspective of two special population groups, disabled and disadvantaged college students. Drawing upon previous research findings, variables under consideration included level of scholastic achievement and endorsement of rational, intuitive, and dependent decision-making styles. Also included were two population-specific variables related to the characteristics of membership in each of the two special groups. The regression analyses conducted to explore the relationships between vocational maturity and these predictor variables indicate, in general, that variance in the attitudinal and cognitive factors of vocational maturity can be at least partially explained by the variables considered. However, the relative contributions of the predictors and the resulting proportions of variance explained differs according to which population and which criterion factor is under examination. These findings are compared with those emerging from previous research, and implications for future efforts are discussed.     

Self-presentation and drive in social facilitation

Social facilitation refers to cases in which the presence of others increases the probability of certain responses on the part of an independently operating individual. Drive theory attributes these effects to an unconscious facilitation of dominant responses, as defined by Hull-Spence learning theory. Self-presentation explanations posit changes in motivation and cognitive strategies that result from an increased concern with favorable private and public images. The present paper reviews evidence and presents an experiment indicating both points of view are valid, but that neither perspective by itself can account for all relevant data.     

The Pursuit of Status in Social Groups

ABSTRACT— Status differences are ubiquitous and highly consequential. Yet with regard to human social groups, basic questions persist about how status differences develop. In particular, little is known about the processes by which individuals pursue status in social groups. That is, how do individuals compete and jockey for status with their peers? The current paper reviews recent research that helps fill this gap in our knowledge. Specifically, studies of a variety of face-to-face groups show that individuals pursue status by enhancing the apparent value they provide to their group. Individuals compete for status not by bullying and intimidating others, as some theorists have proposed, but by behaving in ways that suggest high levels of competence, generosity, and commitment to the group.     

Gender differences in episodic memory and visual working memory including the effects of age

Analysing the relationship between gender and memory, and examining the effects of age on the overall memory-related functioning, are the ongoing goals of psychological research. The present study examined gender and age group differences in episodic memory with respect to the type of task. In addition, these subgroup differences were also analysed in visual working memory. A sample of 366 women and 330 men, aged between 16 and 69 years of age, participated in the current study. Results indicate that women outperformed men on auditory memory tasks, whereas male adolescents and older male adults showed higher level performances on visual episodic and visual working memory measures. However, the size of gender-linked effects varied somewhat across age groups. Furthermore, results partly support a declining performance on episodic memory and visual working memory measures with increasing age. Although age-related losses in episodic memory could not be explained by a decreasing verbal and visuospatial ability with age, women's advantage in auditory episodic memory could be explained by their advantage in verbal ability. Men's higher level visual episodic memory performance was found to result from their advantage in visuospatial ability. Finally, possible methodological, biological, and cognitive explanations for the current findings are discussed.