Economic well-being and children's social adjustment: the role of family process in an ethnically diverse low-income sample

Using latent variable structural equation modeling, a family economic stress model that links economic well-being to child well-being in an ethnically diverse, low-income sample of 419 elementary school-age children was evaluated. The sample was 57% African American and 28% Hispanic, and most families were headed by single mothers. The results provided support for the position that family process is a critical mediator of the effects of economic hardship on children's social adjustment. Lower levels of economic well-being, and the corollary elevated perceptions of economic pressure indirectly affected parenting behavior through an adverse impact on parental psychological well-being. Distressed parents reported feeling less effective and capable in disciplinary interactions with their child and were observed to be less affectionate in parent-child interactions. In turn, less than optimal parenting predicted lower teacher ratings of children's positive social behavior and higher ratings of behavior problems. Multiple-group analyses revealed that the pathways by which economic hardship influences children's behavior appear to operate similarly for boys and girls, and for African American and Hispanic families.     

Toward a resolution of inconsistencies in the phonological deficit theory of reading disorders: phonological reading difficulties are more severe in high-IQ poor readers

This study examined whether high- and low-IQ poor readers differed in patterns of reading performance. Ten-year-old poor readers with IQ scores of 110 and higher showed difficulty in taking a phonological approach to reading, failing to show an advantage in reading high-frequency regular versus irregular words and showing impaired nonword reading accuracy for their reading age. However, poor readers with IQ scores of 90 and below showed a more phonological approach to reading, with better reading of regular than irregular words of both high and low frequency, and with nonword reading skills slower than, but as accurate as, those of reading-age controls. We concluded that the high-IQ poor readers experienced difficulty in taking a phonological approach to reading, whereas the low-IQ poor readers had much less marked phonological problems, supporting Stanovich's phonological-core variable-difference model.     

From novice to no know-how: a longitudinal study of implicit motor learning

The aim of this study was to ascertain whether the performances of implicit and explicit learners would converge over an extended period of learning. Participants practised a complex motor skill--golf putting--for 3000 trials, either with a concurrent secondary, tone-counting task (implicit learning) or without such a task (explicit learning). The cognitive demands of the secondary task were predicted to prevent the accumulation of verbalizable rules about the motor task. The implicit group reported significantly fewer rules than the explicit group on subsequent verbal protocols. The performance of the implicit group remained below that of the explicit group throughout the learning phase. However, no significant differences were found between groups during a delayed retention test. Additionally, for the participants in the explicit group only, a Reinvestment Scale score correlated positively with the number of rules accrued and negatively with overall putting performance during the learning phase. We use the results to argue against the excessive use of verbal instruction during skill acquisition, which might be unnecessary and ultimately might hamper performance under stressful conditions.