EEG alpha asymmetry in dyslexics during speaking and block design tasks

Lateral specialization for speech and spatial construction was investigated in a highly screened group of dyslexic and normal-reading boys, age 9-13, by examining the extent to which their EEG alpha asymmetry changed from one task to the other. EEG was recorded from central, midtemporal, and parietal leads during several minutes of spontaneous narrative speech, and while the child constructed block designs. The dyslexics showed the same strongly task-dependent asymmetry as the normal readers, comparable to that observed in our adult populations. The observations were confirmed with a second independently chosen cohort of subjects. This result is discussed in terms of the constraints it places on models of dyslexia which invoke disorders of lateral specialization and hemisphere integration.     

Regional brain activity in dyslexic and control children during reading tasks: Visual probe event-related potentials

Event-related potentials (ERPs) elicited by task-irrelevant visual stimuli were recorded from 34 control and 32 dyslexic 10- to 12-year-old boys while they performed silent and oral reading at two levels of difficulty. All subjects were extensively screened for neurological problems, IQ, and sensory acuity. Specific features of the ERPs were affected in amplitude and latency by the experimental variables: group membership, oral vs. silent reading, difficulty level, and recording site (within and between hemispheres). A specific effect of difficulty on the central and parietal ERP was seen in the dyslexics but not the controls. Different patterns of asymmetry were found for the two groups in silent vs. oral reading at midtemporal placements. A marked asymmetry (R > L) was found at the midtemporal region for both groups.     

The effect of within-pair variation and instructions on the transposition behavior of kindergarten and third grade children

The reported studies examined the test choices of kindergarten and third-grade children in the two-stimulus size transposition problem in response to variations in (a) the magnitude of the size difference between two objects (the within-pair difference), (b) the distance between training and test pairs (“near” and “far” tests), and (c) verbal instructions. It was hypothesized that third graders would be sensitive to variations in the degree of the difference between two objects and to instructions which identify specific aspects of the stimulus array. In contrast, kindergarteners were expected to base their choices upon the direction of the difference, and thus transpose regardless of within-pair variations and instructions. Results generally confirmed these expectations, supporting the notion that children at these ages differ in their organization of the stimulus field and in the scale of measurement they apply to objects differing in size.     

It takes nine days to iron a shirt: the development of cognitive estimation skills in school age children.

Data are presented for 315 elementary school-aged children (K-11) who took the Biber Cognitive Estimation Test, a 20-item test with five estimation questions in each of four domains: quantity, time/duration, weight, and distance/length. Performance showed significant development yearly until around the age of nine years, with much slower development subsequently. No gender effects were found. Age and fund of knowledge correlated with overall test performance. Fund of information accounted for a large proportion of the variance in estimation skills for children 8 years and under, but not for children 9 years and older. Since estimation skills require retrieval and manipulation of relevant knowledge and inhibition of impulsive responding and are necessary in many everyday tasks, it was anticipated that this test may provide a useful measure of judgment and estimations and may correlate with other executive skills in school-aged children.     

Key Word Index Volume 7

Other Index

Key Word Index Volume 7     

Screening for autism in young children: The Modified Checklist for Autism in Toddlers (M-CHAT) and other measures

The literature on the importance of early identification and early intervention for children with developmental disabilities such as autism continues to grow. The increased prevalence of autistic spectrum disorders has fostered research efforts on the development and validation of autism-specific screening instruments for use with young children. There are currently several such autism-specific screening tools meant to be used with young children in various stages of development. Data from a few of these screening instruments have been published, and they include the Checklist for Autism in Toddlers (CHAT), Pervasive Developmental Disorders Screening Test (PDDST), Screening Tool for Autism in Two year olds (STAT), Checklist for Autism in Toddlers-23 (CHAT-23), and the Modified Checklist for Autism in Toddlers (M-CHAT). In this review, these five tools designed for use with children under three years old will be highlighted. In particular, the Modified Checklist for Autism in Toddlers (M-CHAT) will be discussed.     

Adolescent Decisional Autonomy Regarding Participation in an Emergency Department Youth Violence Interview

Much attention has been given to determining whether an adolescent patient has the capacity to consent to research. This study explores the factors that influence adolescents' decisions to participate in a research study about youth violence and to determine positive or negative feelings elicited by being a research subject. The majority of subjects perceived their decision to participate to be free of coercion, and few felt badly about having participated. However, adolescents who were alone in the room during the assent process were more likely to report that they chose freely to be a research subject. This study may influence the ways physicians communicate with adolescent patients around research assent within a clinical care environment.     

The security to lead: a systematic review of leader and follower attachment styles and leader–member exchange

ABSTRACT

Attachment styles can predict the quality of organizational relationships, particularly in reference to leader–member exchange (LMX). However, there is much work to be done in articulating and summarizing these findings and in detecting gaps in the literature. This systematic review fills a critical niche by providing a review of the attachment/LMX relationship. Using the PRISMA framework, this review integrates research on attachment styles and LMX by evaluating associations between secure, anxious, and avoidant attachment styles with LMX for leaders and followers. Across 10 studies, we review the evidence for associations between leader and follower attachment and LMX. We seek to investigate if secure attachment is associated with high-quality LMX and if insecure attachment is associated with lower quality LMX. Our review in general provides mixed support for these propositions, although the association of avoidant attachment for followers with LMX received consistent support. Furthermore, our results highlight the need to consider potential moderating and mediating factors within the attachment/LMX relationship. Based on the patterns of these relationships and the methodological gaps in the literature, we discuss the managerial implications for attachment styles in work and organizational psychology and suggest several directions for future research on the attachment–LMX relationship.