The Self-Perception Profile for Children: further evidence for its factor structure, reliability, and validity

This article presents further evidence for the psychometric qualities of the Self-Perception Profile for Children (SPPC), a widely used questionnaire for assessing self-esteem in youths. The SPPC was administered to a large sample of Dutch school children (N=1143) in order to study its factor structure, reliability (internal consistency and test–retest stability), and validity. Results showed that the hypothesized factor structure of the SPPC representing five specific domains of self-esteem (i.e. scholastic competence, social acceptance, athletic competence, physical appearance, and behavioral conduct) provided a reasonable fit for the data. Furthermore, the reliability of the scale appeared to be satisfactory with good internal consistency and test–retest stability. Finally, evidence was also obtained for the validity of the SPPC. More specifically, the scale correlated in a theoretically meaningful way with child-, parent-, and teacher-reports of psychopathology and personality. Altogether, the current findings confirm the notion that the SPPC is a reliable and valid self-report measure for assessing children's self-esteem.     

A Quantitative Meta-analysis of Olfactory Dysfunction in Epilepsy

Neuropsychology Review - Olfactory dysfunction in epilepsy is well-documented in several olfactory domains. However, the clinical specificity of these deficits remains unknown. The aim of this...     

The use of snowball sampling for multi source organizational research: Some cause for concern

In snowball sampling for multisource studies, researchers ask target participants to recruit informants. Despite its widespread use, especially for recruiting informants for multisource research, virtually no published research has addressed possible biases snowball sampling may cause in findings of this type of research. Such potential biases were tested empirically in a multisource study with a sample of 1,058 employed students asked to collect online ratings from their supervisors and coworkers. Informant ratings were obtained for 358 target participants. Objective indicators were employed to identify informant ratings suspicious of being fabricated. Results indicated that target participants who report (a) better relationship quality with informants, (b) fewer organizational constraints, and (c) more favorable self‐evaluations on behaviors to be rated by informants were more likely to be included in multisource data unsuspicious of being fabricated. Inclusion of informant ratings suspicious of being fabricated led to inflated estimates of self‐other consensus and of variance accounted for in criterion measures, to deflated informant rating means, but also to a target sample less restricted in terms of relevant organizational variables. In sum, the present findings suggest that potential biases should be identified in future uses of snowball sampling. Some practical recommendations toward that end are derived.     

Correlates of general quality of life are different in patients with primary insomnia as compared to patients with insomnia and psychiatric comorbidity

Chronic insomnia is known to have a negative influence on quality of life (QOL). To date, most studies on chronic insomnia have focused on health-related aspects of QOL. General QOL, which is a different construct, has not been studied in detail. Moreover, it is not known which factors are associated with general QOL in insomnia, and whether the presence of mental disorders, a condition known as comorbid insomnia, affects these variables. The present study focused on identifying sleep and psychosocial variables that might be associated with general QOL in primary and comorbid insomnia. Personality traits, coping variables, anxiety and depressive symptoms, fatigue and subjective sleep variables were assessed in 218 consecutive well-characterized patients with primary and comorbid insomnia, referred to a third line centre for sleep medicine. In primary insomnia, higher extraversion and lower discrepancies in social support were associated with higher QOL. Surprisingly, insomnia severity was not significantly associated with QOL in this group. However, lower fatigue, which can be seen as an important daytime consequence of insomnia was correlated with higher QOL in patients with primary insomnia. In both insomnia groups, low anxiety and depressive symptoms and low fatigue were associated with higher general QOL. In contrast with the primary insomnia group, lower insomnia severity was correlated with higher QOL in patients with comorbid insomnia. These results stress the importance of assessing and treating daytime fatigue in insomnia. In primary insomnia, improving social support might be an important treatment goal. Furthermore, this study supports the concept that treatment of insomnia should not be neglected in patients with comorbid insomnia. Indeed, both insomnia and indices of psychiatric disease are strongly associated with general QOL in this condition.     

Medical Students’ Gender Awareness

Gender awareness in medicine consists of two attitudinal components: gender sensitivity and gender-role ideology. In this article, the development of a scale to measure these attitudes in Dutch medical students is described. After a pilot study and a feasibility study, 393 medical students in The Netherlands responded to a preliminary instrument consisting of 82 items (response rate 61.3%). Reliability and validity were established. A gender awareness scale containing a gender sensitivity subscale (14 items), and gender stereotypes towards patients (11 items) as well as towards doctors (7 items) was developed. The instrument may be used for research purposes to evaluate gender awareness raising courses.     

Action–effect anticipation in infant action control

There is increasing evidence that action effects play a crucial role in action understanding and action control not only in adults but also in infants. Most of the research in infants focused on the learning of action-effect contingencies or how action effects help infants to infer goals in other persons' actions. In contrast, the present research aimed at demonstrating that infants control their own actions by action-effect anticipation once they know about specific action-effect relations. About 7 and 9-month olds observed an experimenter demonstrating two actions that differed regarding the action-effect assignment. Either a red-button press or a blue-button press or no button press elicited interesting acoustical and visual effects. The 9-month olds produced the effect action at first, with shorter latency and longer duration sustaining a direct impact of action-effect anticipation on action control. In 7-month olds the differences due to action-effect manipulation were less profound indicating developmental changes at this age.     

Sex differences in mental rotation with polygons of different complexity: Do men utilize holistic processes whereas women prefer piecemeal ones?

Sex differences in mental rotation were investigated as a function of stimulus complexity with a sample size of N = 72. Replicating earlier findings with polygons, mental rotation was faster for males than for females, and reaction time increased with more complex polygons. Additionally, sex differences increased for complex polygons. Most importantly, however, mental rotation speed decreased with increasing complexity for women but did not change for men. Thus, the sex effects reflect a difference in strategy, with women mentally rotating the polygons in an analytic, piecemeal fashion and men using a holistic mode of mental rotation.     

Gricean Expectations in Online Sentence Comprehension: An ERP Study on the Processing of Scalar Inferences

There is substantial support for the general idea that a formalization of comprehenders' expectations about the likely next word in a sentence helps explaining data related to online sentence processing. While much research has focused on syntactic, semantic, and discourse expectations, the present event‐related potentials (ERPs) study investigates neurolinguistic correlates of pragmatic expectations, which arise when comprehenders expect a sentence to conform to Gricean Maxims of Conversation. For predicting brain responses associated with pragmatic processing, we introduce a formal model of such Gricean pragmatic expectations, using an idealized incremental interpreter. We examine whether pragmatic expectancies derived from this model modulate the amplitude of the N400, a component that has been associated with predictive processing. As part of its parameterization, the model distinguishes genuine pragmatic interpreters, who expect maximally informative true utterances, from literal interpreters, who only expect truthfulness. We explore the model's non‐trivial predictions for an experimental setup which uses picture‐sentence verification with ERPs recorded at several critical positions in sentences containing the scalar implicature trigger some. We find that Gricean expectations indeed affect the N400, largely in line with the predictions of our model, but also discuss discrepancies between model predictions and observations critically.     

Dealing with deviants: The effectiveness of rejection,denial, and apologies on protecting the public image of a group

Public transgressions by group members threaten the public image of a group when outside observers perceive them as representative of the group in general. In three studies, we tested the effectiveness of rejection of a deviant group member who made a racist comment in public, and compared this to several other strategies the group could employ to protect their image. In Study 1 (N = 75) and Study 2 (N = 51), the group was judged less racist after rejecting the deviant than after claiming a non‐racist position or not responding to the transgression. Perceived typicality of the deviant partially mediated this effect in Study 2. In Study 3 (N = 81), the group was judged least racist after forcing the deviant to apologize and as most racist after denying the severity of the transgression. Results also showed a negative side‐effect of rejection. Perceived exclusion of the deviant contributed to a perception of the group as disloyal to its members, which resulted in a less favorable overall group evaluation. Potential benefits and risks of rejection, denial, and apologies are further discussed in the General Discussion. Copyright © 2009 John Wiley & Sons, Ltd.     

Motor and Visual-spatial Cognition Development in Primary School-Aged Children in Cameroon and Germany

It was the main goal of this study to investigate the motor and visual-spatial development in primary school-aged children in Cameroon and Germany. Thirty-four children from each country completed a motor test and a mental rotation test. It was found that children in Cameroon showed a better motor ability (better overall gross motor score and also on most single items) than children in Germany did. This can be explained by the early motor stimulation in infancy in Cameroon. Concerning mental rotation performance, Cameroonian children perform below chance level. A positive correlation between the overall motor ability and mental rotation performance could only be analyzed and conducted in the German sample. Therefore, this study emphasizes the need for the development of culture-fair cognitive tests.