Effects of cultural background on WAIS‐III and WMS‐III performances after moderate‐severe traumatic brain injury

The assessment of cognitive function in individuals of culturally and linguistically diverse background poses considerable challenges for the psychologist, particularly when English proficiency is limited. This study explored the effects of diverse cultural background and non‐Western educational background on Wechsler Adult Intelligence Scale‐Third edition (WAIS‐III) and Wechsler Memory Scale‐Third Edition (WMS‐III) performances in moderate‐severe traumatic brain injury within an outpatient rehabilitation setting. Participants were aged 16–65 years and met careful selection criteria. IQ, index and age‐scaled subtest scores were compared across three groups: (a) English‐speaking background (n = 130), (b) culturally and linguistically diverse background and education completed in English (n = 33), and (c) culturally and linguistically diverse background and non‐English education (n = 33). Cultural backgrounds included people of Asian, European, Middle Eastern, African and Oceania origin. Results were that the English‐educated culturally and linguistically diverse group performed lower than the English‐speaking background group on some verbal WAIS‐III measures; effect sizes were small‐moderate. The non‐English‐educated culturally and linguistically diverse group performed lower than both groups on several WAIS‐III and one WMS‐III measure, with large effect sizes. Clinical implications included the need for caution in interpreting test scores to avoid diagnostic errors and the need for further development of valid assessment tools.     

A short note on the maximal point‐biserial correlation under non‐normality

The aim of this paper is to derive the maximal point‐biserial correlation under non‐normality. Several widely used non‐normal distributions are considered, namely the uniform distribution, t‐distribution, exponential distribution, and a mixture of two normal distributions. Results show that the maximal point‐biserial correlation, depending on the non‐normal continuous variable underlying the binary manifest variable, may not be a function of p (the probability that the dichotomous variable takes the value 1), can be symmetric or non‐symmetric around p = .5, and may still lie in the range from ?1.0 to 1.0. Therefore researchers should exercise caution when they interpret their sample point‐biserial correlation coefficients based on popular beliefs that the maximal point‐biserial correlation is always smaller than 1, and that the size of the correlation is always further restricted as p deviates from .5.     

Effect of non-normality on test statistics for one-way independent groups designs

The data obtained from one‐way independent groups designs is typically non‐normal in form and rarely equally variable across treatment populations (i.e. population variances are heterogeneous). Consequently, the classical test statistic that is used to assess statistical significance (i.e. the analysis of variance F test) typically provides invalid results (e.g. too many Type I errors, reduced power). For this reason, there has been considerable interest in finding a test statistic that is appropriate under conditions of non‐normality and variance heterogeneity. Previously recommended procedures for analysing such data include the James test, the Welch test applied either to the usual least squares estimators of central tendency and variability, or the Welch test with robust estimators (i.e. trimmed means and Winsorized variances). A new statistic proposed by Krishnamoorthy, Lu, and Mathew, intended to deal with heterogeneous variances, though not non‐normality, uses a parametric bootstrap procedure. In their investigation of the parametric bootstrap test, the authors examined its operating characteristics under limited conditions and did not compare it to the Welch test based on robust estimators. Thus, we investigated how the parametric bootstrap procedure and a modified parametric bootstrap procedure based on trimmed means perform relative to previously recommended procedures when data are non‐normal and heterogeneous. The results indicated that the tests based on trimmed means offer the best Type I error control and power when variances are unequal and at least some of the distribution shapes are non‐normal.     

A Theory of Bayesian Groups

A group is often construed as one agent with its own probabilistic beliefs (credences), which are obtained by aggregating those of the individuals, for instance through averaging. In their celebrated “Groupthink”, Russell et al. (2015) require group credences to undergo Bayesian revision whenever new information is learnt, i.e., whenever individual credences undergo Bayesian revision based on this information. To obtain a fully Bayesian group, one should often extend this requirement to non‐public or even private information (learnt by not all or just one individual), or to non‐representable information (not representable by any event in the domain where credences are held). I propose a taxonomy of six types of ‘group Bayesianism’. They differ in the information for which Bayesian revision of group credences is required: public representable information, private representable information, public non‐representable information, etc. Six corresponding theorems establish how individual credences must (not) be aggregated to ensure group Bayesianism of any type, respectively. Aggregating through standard averaging is never permitted; instead, different forms of geometric averaging must be used. One theorem—that for public representable information—is essentially Russell et al.'s central result (with minor corrections). Another theorem—that for public non‐representable information—fills a gap in the theory of externally Bayesian opinion pooling.     

Four improved statistics for contrasting means by correcting skewness and kurtosis

This paper is concerned with removing the influence of non‐normality in the classical t‐statistic for contrasting means. Using higher‐order expansion to quantify the effect of non‐normality, four corrected statistics are provided. Two aim to correct the mean bias and two to correct the overall distribution. The classical t‐statistic is also robust against non‐normality when the observed variables satisfy certain structures. A special case is when the marginal distributions of the contrast are independent and identically distributed.     

The satisfaction and stress of being a market maven: A social network perspective

Compared with the average consumer, market mavens possess a unique set of characteristics including a greater depth of knowledge of the marketplace and its products, as well as a strong social network. Based on a field study of an emerging social network of Canadian undergraduate students (N = 71), we examine the level of satisfaction and stress that market mavens experience as a result of their network participation. First, market mavens (versus non‐mavens) are more satisfied with their network if they occupy central network positions. Simultaneously, however, mavens incur more stress if they occupy these central positions. Further, market mavens have a lower rate of network growth and build a more a selective network of like‐minded others over time. This suggests that market mavens seek to interact with other market mavens more so than with non‐mavens about product‐related and market‐related information. Together, we provide new insights into the personal outcomes of market mavens' network positions and their networking behavior. Copyright © 2015 John Wiley & Sons, Ltd.     

Culture or anonymity? Differences in proposer behaviour in Korea and Germany

This study explores the proposer behaviour in an ultimatum game (UG) frame under anonymous and non‐anonymous conditions among a Korean and German subject pool (n = 590) in comparison. Whereas the anonymous condition is represented by the standard UG, the non‐anonymous condition integrates an aggregate of the Korean cultural context variables university affiliation, regional origin and seniority. The latter, a classic Confucian context variable, is measured by age differentials. The former two are impactful components of so‐called Yongo networks, a unique Korean informal institution identical to Chinese Guanxi ties. Yongo networks, yet underrepresented in research, are said to be a central context variable to explain Korean social ties and decision‐making behaviour. We observe significant differences between the offer behaviours of Korean and German subjects when exposing selected cultural variables. We argue that the behavioural differences observed are in fact due to culture not anonymity.     

Previous reward decreases errors of commission on later ‘No‐Go’ trials in children 4 to 12 years of age: evidence for a context monitoring account

Inhibitory control is widely hypothesized to be the cornerstone of executive function in childhood and the central deficit in a number of developmental disorders, including attention‐deficit/hyperactivity disorder (ADHD). However, recent evidence from adults indicates that performance on response inhibition tasks may primarily reflect non‐inhibitory attentional control (context monitoring) processes. Yet it may be that inhibition plays a more central role in childhood – a time when the architecture of cognitive processes might be more transparent due to wide variability in skill level. Here we directly test inhibitory and context monitoring explanations of task performance on a Go/No‐Go task in a large group of children 4–12 years of age. We conclude that traditional inhibitory conceptualizations of task performance on the Go/No‐Go task cannot account for our findings, calling into question evidence supporting a central role for inhibitory control in cognitive development or developmental psychopathology.     

Characteristics of memories for traumatic and nontraumatic birth

Evidence for memory characteristic differences between trauma and other memories in non‐clinical samples is inconsistent. However, trauma is frequently confounded with the event recalled. This study compares trauma and nontrauma memories for the same event, childbirth, in a non‐clinical sample of 285 women 4–6 weeks after birth. None of the women met diagnostic criteria for post‐traumatic stress disorder. Traumatic birth, defined by the DSM‐5 event criterion, was reported by 100 women. The ratings of some memory characteristics did not differ between memories for traumatic and nontraumatic birth: All were rated highly coherent and central to women's lives, with moderate sensory memory. However, women who experienced traumatic births reported more involuntary recall, reliving, and negative/mixed emotions. Thus, trauma memories differed from nontrauma memories. In this non‐clinical sample, this is likely to be due to encoding during trauma rather than the distinctive memory profile for memories retrieved by those experiencing trauma symptoms.     

The Japanese Tea Ceremony and Pancultural Definitions of Art

Dominic McIver Lopes and Yuriko Saito claim that the Japanese tea ceremony, or chadō, is a non‐Western art form. Stephen Davies also defends that claim. In this article, I utilize the tea ceremony as a test case for pancultural definitions of art that claim to be inclusive of non‐Western cultures without relying on Western ethnocentrism to justify their status as artworks. I argue that Davies's (2015) hybrid definition is not justified in assuming a homogenous art tradition and/or a unified conception of artistic practices in a non‐Western culture. Moreover, the cladistic structure of his definition fails to accommodate the spontaneous instantiation of new art traditions. Additionally, Jerrold Levinson's Intentional‐Historical definition cannot satisfactorily accommodate chadō. First, the nonart origins that were formative for the regard that is required for appreciation of the tea ceremony mean that the relational interpretation of the definition fails. Second, Rikyū’s tea ceremony does not count as art incidentally, as it is not a form of mimesis nor does the Japanese wabi aesthetic that is central to chadō have a precursor in known Western art. Third, if chadō does satisfy Levinson's extended theory, it comes at the cost of embracing Western ethnocentrism.     

Mnemic neglect and self‐threat: Trait modifiability moderates self‐protection

The mnemic neglect effect is the phenomenon of disproportionately poor recall for threatening (rather than non‐threatening) feedback that refers to the self (rather than another person). Does trait modifiability moderate mnemic neglect? We hypothesized that mnemic neglect will be present for feedback on unmodifiable traits, but absent for feedback on modifiable traits. In the latter case, the feedback would be lower in threat potential because its consequences are fleeting and steps to prevent its reoccurrence are possible. Participants received mixed (threatening and non‐threatening) feedback that referred either to the self or another person. The feedback pertained to (central and peripheral) self‐conceptions that were either unmodifiable or modifiable. In support of the hypothesis, mnemic neglect emerged for feedback on unmodifiable, but not modifiable, traits. The findings illustrate the selective and strategic nature of self‐protection. Copyright © 2004 John Wiley & Sons, Ltd.     

Reinforcement sensitivity of sex offenders and non‐offenders: An experimental and psychometric study of reinforcement sensitivity theory

This study tested predictions of Gray's Reinforcement Sensitivity Theory (RST) in subgroups of sex offenders and male non‐offenders using an experimental choice task consisting of a reward and a non‐reward phase. In addition, RST‐related psychometric measures were used. Both experimental and psychometric data were of interest to determine whether sex offenders could be reliably differentiated from non‐offenders. Paraphilic (N=50) and impulse control‐disordered (N=48) sex offenders showed greater sensitivity to continuous reward than male non‐offenders (N=51). Impulse control‐disordered sex offenders showed less behavioural adaptation under non‐reward than both paraphilic sex offenders and male non‐offenders. In addition, reward sensitivity, rash‐spontaneous impulsivity, and anxiety measures discriminated sex offenders from male non‐offenders. The results suggest that reinforcement sensitivity is a promising personality trait for differentiating subgroups of sex offenders from non‐offenders. The experimental and psychometric results illustrate that predictive accuracy in forensic settings could be improved by combining several types of data.     

Manipulations of vasopressin alter aggression differently across testing conditions in monogamous and non‐monogamous Peromyscus mice

Differences in the distribution of arginine vasopressin (AVP) and a subtype of AVP receptors, the V_1a receptor, may explain dissimilarities in social behavior of monogamous and non‐monogamous rodents. Intracerebroventricular infusions of AVP and a V_1a antagonist were used in sexually naive males of two mouse species, the monogamous and highly aggressive California mouse (Peromyscus californicus) and the non‐monogamous and less aggressive white‐footed mouse (P. leucopus), to begin testing the interaction between the social system of a species and the effects of AVP on aggression. Two testing conditions, the resident‐intruder aggression test (R‐I) and the neutral arena aggression test, were used because they may differ in function and underlying biological mechanisms. In the R‐I test, administration of the antagonist lengthened attack latencies in California mice. In contrast, blocking V_1a receptors did not alter attack latencies in the R‐I test in white‐footed mice or in the neutral arena aggression test in both species. AVP also did not alter aggression in either species in either behavioral test. Overall, these results suggest that AVP may be more likely to be associated with offensive aggression as measured in the R‐I test than with neutral arena aggression and that the effects of AVP manipulations may differ between monogamous and non‐monogamous rodents. Aggress. Behav. 31:000–000, 2005. © 2005 Wiley‐Liss, Inc.     

Children's memory for television advertising: effects of programme–advertisement congruency

The effects of the surrounding programme environment and level of involvement upon children's memory (year 6 primary school, mean age 11.1, SD = 0.4, 48 boys and 69 girls) for television advertisements was examined by manipulating the degree of congruency between the production genre of the programme and the advertisements embedded within it. In Experiment One (n = 56) the ad‐break comprised either all cartoons (n = 4) or all non‐cartoons (n = 4). In Experiment Two (n = 61) cartoon and non‐cartoon advertisements were equally represented in each ad‐break. After viewing, participants provided evaluative ratings of the programme and completed memory tests for advertisements, using prompted recall and brand‐recognition tasks. Memory performance overall was better for cartoon advertisements than for non‐cartoon advertisements, with the latter being poorly remembered when presented in the non‐cartoon programme. In Experiment Two, the programme had no effect on overall recall of advertising, but was related to brand recognition, which was better for advertisements placed in the cartoon programme. Free recall of non‐cartoon advertisements was best when placed in the cartoon programme, while free recall only of cartoon advertisements was best when placed in the non‐cartoon programme. The measures of audience involvement (programme ratings) did not show any significant correlation with memory for advertising. Copyright © 2002 John Wiley & Sons, Ltd.     

Social Dominance Orientation and John Henryism at the Intersection of Race and Class

Three studies were conducted to explore the relationship between social dominance orientation (SDO) and John Henryism (JH). Each study was framed using an intersectionality perspective which predicted that specific combinations of social identities would impact endorsement of SDO and JH in unique ways. We hypothesized that upper‐class non‐Whites would be higher in SDO and lower in JH than any other class/race identity combination. As predicted, a Class × Race interaction emerged for both SDO and JH in Study 1 (N = 387), with upper‐class non‐Whites displaying the highest levels of SDO and the lowest levels of JH. Study 2 (N = 340) replicated these findings and also explored the impact of context‐level class on SDO and JH. Using a qualitative method, in Study 3 (N = 23) we found that upper‐class non‐Whites described their social class positions in ways highly consistent with SDO, whereas middle/working‐class non‐Whites described their experiences in ways consistent with JH.     

Paranormal belief and the conjunction fallacy: Controlling for temporal relatedness and potential surprise differentials in component events

Recent research suggests paranormal believers are especially prone to the ‘conjunction fallacy’. The current study extends this work by presenting believers and non‐believers with eight paranormal plus eight non‐paranormal scenarios. Participants were given either a paranormal or virtually identical non‐paranormal version of each scenario. Of these, half incorporated component events which were (virtually) co‐occurring with half including components which were temporally disjointed. Analysis of Covariance (ANCOVA; controlling for gender and maths/stats/psychology qualifications) found believers made more conjunction errors than non‐believers. Neither event type (paranormal vs. non‐paranormal) nor components' temporal relationship (co‐occurring vs. disjointed) had a significant effect on conjunction biases. Believers' tendency to produce larger conjunctive estimates was unrelated to group differences in component probability estimates (surprise values) and further, could not be attributed to group differences in the perceived functional relationship between component and conjunctive events. Possible explanations are discussed. Copyright © 2010 John Wiley & Sons, Ltd.     

At 11 months,prosody still outranks statistics

English‐learning 7.5‐month‐olds are heavily biased to perceive stressed syllables as word onsets. By 11 months, however, infants begin segmenting non‐initially stressed words from speech. Using the same artificial language methodology as Johnson and Jusczyk (2001 ), we explored the possibility that the emergence of this ability is linked to a decreased reliance on prosodic cues to word boundaries accompanied by an increased reliance on syllable distribution cues. In a baseline study, where only statistical cues to word boundaries were present, infants exhibited a familiarity preference for statistical words. When conflicting stress cues were added to the speech stream, infants exhibited a familiarity preference for stress as opposed to statistical words. This was interpreted as evidence that 11‐month‐olds weight stress cues to word boundaries more heavily than statistical cues. Experiment 2 further investigated these results with a language containing convergent cues to word boundaries. The results of Experiment 2 were not conclusive. A third experiment using new stimuli and a different experimental design supported the conclusion that 11‐month‐olds rely more heavily on prosodic than statistical cues to word boundaries. We conclude that the emergence of the ability to segment non‐initially stressed words from speech is not likely to be tied to an increased reliance on syllable distribution cues relative to stress cues, but instead may emerge due to an increased reliance on and integration of a broad array of segmentation cues.     

Atypical brain responses to sounds in children with specific language and reading impairments

This study tested if children with specific language impairment (SLI) or children with specific reading disability (SRD) have abnormal brain responses to sounds. We tested 6‐ to 12‐year‐old children with SLI (N =19), children with SRD (N =55), and age‐matched controls (N =36) for their passive auditory event‐related potentials (ERPs) to tones, rapid tones, vowels and consonant‐vowels. Thirty‐eight percent of the children with SLI or SRD had less typical passive auditory ERPs in the N1–P2 window to sounds in general, rather than to tones, rapid tones, vowels or consonant‐vowels specifically. The ERPs of these children were significantly ‘flatter’ in the N1–P2 region than normal. All the children with flatter ERPs in the N1–P2 region had poor non‐word reading. A subgroup of these poor non‐word readers also had poor non‐word repetition. These findings support the hypothesis that impaired auditory processing is a causal risk factor for both SLI and SRD.     

Academic self‐concept and academic achievement: Relations and causal ordering

Background. A positive self‐concept is valued as a desirable outcome in many disciplines of psychology as well as an important mediator to other outcomes. Aims. The present review examines support for the reciprocal effects model (REM) that posits academic self‐concept (ASC) and achievement are mutually reinforcing, each leading to gains in the other – and its extension to other achievement domains. Method. We review theoretical, methodological, and empirical support for the REM. Critical features in this research are a theoretical emphasis on multidimensional perspectives that focus on specific components of self‐concept and a methodological focus on a construct validity approach to evaluating the REM. Results. Consistent with these distinctions, REM research and a comprehensive meta‐analysis show that prior ASC has direct and indirect effects on subsequent achievement, whilst the effects of self‐esteem and other non‐academic components of self‐concept are negligible. We then provide an overview of subsequent support for the generality of the REM for: young children, cross‐cultural, health (physical activity), and non‐elite (gymnastics) and elite (international swimming championships) sport. Conclusion. This research is important in demonstrating that increases in ASC lead to increases in subsequent academic achievement and other desirable educational outcomes. Findings confirm that not only is self‐concept an important outcome variable in itself, it also plays a central role in affecting other desirable educational outcomes. Implications for educational practice are discussed.     

Predicting job performance using FFM and non‐FFM personality measures

This study compares the criterion validity of the Big Five personality dimensions when assessed using Five‐Factor Model (FFM)‐based inventories and non‐FFM‐based inventories. A large database consisting of American as well as European validity studies was meta‐analysed. The results showed that for conscientiousness and emotional stability, the FFM‐based inventories had greater criterion validity than the non FFM‐based inventories. Conscientiousness showed an operational validity of .28 (N = 19,460, 90% CV = .07) for FFM‐based inventories and .18 (N =5,874, 90% CV = ‐.04) for non‐FFM inventories. Emotional stability showed an operational validity of .16 (N = 10,786, 90% CV = .04) versus .05 (N = 4,541, 90% CV = ‐.05) for FFM and non‐FFM‐based inventories, respectively. No relevant differences emerged for extraversion, openness, and agreeableness. From a practical point of view, these findings suggest that practitioners should use inventories based on the FFM in order to make personnel selection decisions.