The Efficacy of a Group Triple P (Positive Parenting Program) for Chinese Parents with a Child Diagnosed with ADHD in Hong Kong: A Pilot Randomised Controlled Study

The present pilot study evaluated the efficacy of the Level 4 Group Positive Parenting Program (Triple P) with Hong Kong Chinese parents who had a child with attention deficit/hyperactivity disorder (ADHD), using a randomised controlled trial design. It was a mixed research method involving quantitative measurement and semi‐structured focus group. Participants were randomly assigned to Triple P (n = 8) or control group (n = 9) and completed measures on child disruptive behaviours, sense of parenting efficacy and satisfaction, family stress and service needs. Outcomes were assessed at pre‐, post‐, and 3‐month follow‐up. A focus group was also conducted with the participants in the intervention group upon the programme completion. Compared with the control group, the intervention group reported a significant reduction in intensity of child behaviour problems and a significant increase in parenting efficacy at post‐intervention. The gain in reducing intensity of child disruptive behaviours maintained to 3 months after the completion of programme. Qualitative data suggested the three key elements to help both parents and children get positive changes: understanding and empathy, emotional control, and persistence in applying positive parenting strategies. The results partially provided preliminary evidence supporting the efficacy of Triple P in reducing child behaviour problems for ADHD in Chinese society.     

The coupling of short sleep duration and high sleep need predicts riskier decision making

Abstract

Objective: To examine how risk-related decision making might be associated with habitual sleep variables, including sleep variability, sleep duration and perceived sleep need in young adults cross-sectionally and longitudinally.

Design: 166 participants completed a 7-day protocol with sleep and risk-related decision-making measures at baseline (T1) and 12 months later (T2).

Results: Habitual short sleep duration (averaging < 6?h nightly) was identified in 11.0% in our sample. After controlling for baseline demographic factors and risk-taking measures, self-reported sleep need at T1 interacted with habitual short sleep in predicting risk taking at follow-up (F_8,139=9.575, adjusted R²=.431, p<.001). T1 greater perceived sleep need predicted more risk taking among short sleepers, but decreased risk taking among normal sleepers at T2. Variable sleep timing was cross-sectionally correlated with making more Risky choices at baseline and fewer Safe choices after loss at follow up.

Conclusions: Young adults with variable sleep timing and those with short sleep duration coupled with high perceived sleep need were more likely to take risks. The moderating effects of perceived sleep need suggest that individual differences may alter the impact of sleep loss and hence should be measured and accounted for in future studies.     

Generalist genes and cognitive abilities in Chinese twins

This study considered how far nonverbal cognitive, language and reading abilities are affected by common genetic influences in a sample of 312 typically developing Chinese twin pairs aged from 3 to 11 years. Children were individually given tasks of Chinese word reading, receptive vocabulary, phonological memory, tone awareness, syllable and rhyme awareness, rapid automatized naming, morphological awareness and orthographic skills, and Raven's Colored Progressive Matrices. Factor analyses on the verbal tasks adjusted for age indicated two factors: Language as the first factor and Reading as the second factor. Univariate genetic analyses indicated that genetic influences were substantial for nonverbal cognitive ability and moderate for language and reading. Multivariate genetic analyses showed that nonverbal cognitive ability, language and reading were influenced by shared genetic origins, although there were specific genetic influences on verbal skills that were distinct from those on nonverbal cognitive ability. This study extends the Generalist Genes Hypothesis to Chinese language and reading skills, suggesting that the general effects of genes could be universal across languages.     

Assessing and Reporting the Accuracy of Position Measurements Made With Optical Tracking Systems

The use of optical tracking systems to record human movement is now widespread. Although such systems are convenient and potentially very accurate, they must be used carefully to ensure good data. This paper describes the procedures of calibration and reconstruction of position data in cartesian coordinates and suggests steps to maximize their accuracy. Procedures are proposed for characterizing the accuracy of measurement throughout the experimental workspace, and open discussion of the issue by the research community is invited.     

Overhearing a language during childhood

Despite its significance for understanding of language acquisition, the role of childhood language experience has been examined only in linguistic deprivation studies focusing on what cannot be learned readily beyond childhood. This study focused instead on long-term effects of what can be learned best during childhood. Our findings revealed that adults learning a language speak with a more nativelike accent if they overheard the language regularly during childhood than if they did not. These findings have important implications for understanding of language-learning mechanisms and heritage-language acquisition.     

Holding on to childhood language memory

While early language experience seems crucial for mastering phonology, it remains unclear whether there are lasting benefits of speaking a language regularly during childhood if the quantity and quality of speaking drop dramatically after childhood. This study explored the accessibility of early childhood language memory. Specifically, it compared perception and production of Korean speech sounds by childhood speakers who had spoken Korean regularly for a few years during childhood to those of two other groups: (1) childhood hearers who had heard Korean regularly during childhood but had spoken Korean minimally, if at all; and (2) novice learners. All three groups were enrolled in first-year college Korean language classes. Childhood speakers were also compared to native speakers of Korean to see how native-like they were. The results revealed measurable long-term benefits of childhood speaking experience, underscoring the importance of early language experience, even if such experience diminishes dramatically beyond childhood.     

Understanding the language of reasoning: Cognitive,linguistic, and developmental influences

Certain linguistic structures imply speakers' beliefs about their utterances. Factuals imply that the speaker's hypothesis matches observed data; counterfactuals suggest that hypotheses and observations differ, and uncertainty implies that unclear observations make many hypotheses tenable. We examined how age(11-and 16-year-olds and college students) and syntactic structure (subordinating conjunctions, cognitive verbs, and verb modifications) affect the ability to specify the hypothetical and observational referents of expressions of factual, counterfactual, and uncertainty beliefs. There was considerable linguistic growth during adolescence. College students outperformed the younger students. Age differences were most pronounced on judging the hypothetical referents of counterfactuals and uncertainty structures. The two precollege groups often misinterpreted counterfactuals and uncertainty structures because they equated hypotheses with observations. They seldom understood that uncertainty meant that more than one hypothesis could account for observations. Verb modifications were easier to interpret than cognitive verbs, and subordinating conjunctions were hardest. Factuals were easier than counterfactuals and uncertainty structures.     

Effects of surface texture and grip force on the discrimination of hand-held loads

In this paper, we report the results from two experiments in which subjects were required to discriminate horizontal load forces applied to a manipulandum held with a precision grip. The roughness (and hence friction) of the grip surfaces and required grip force were manipulated. In the first experiment, subjects were instructed to judge the load while maintaining hand position and not letting the manipulandum slip. It was found that performance was influenced by surface texture; a given load was judged to be greater when the surface texture was smooth than when it was rough. This result is consistent with a previous study based on lifting objects and indicates that the effect of surface texture applies to loads in general and not just to gravitational loads (i.e., weight). To test whether the load acting on a smooth object is judged to be greater because the grip force required to prevent it from slipping is larger, a second experiment was carried out. Subjects used a visual feedback display to maintain the same grip force for smooth and rough manipulandum surfaces. In this case, there was no effect of surface texture on load perception. These results provide evidence that perceived load depends on the grip force used to resist the load. The implications of these results in terms of central and peripheral factors underlying load discrimination are considered.