Publications by authors named "Jan Van Leeuwe"

The goal of this longitudinal study was to examine how lexical quality predicts the emergence of literacy abilities in 169 Dutch kindergarten children before formal reading instruction has started. At the beginning of the school year, a battery of precursor measures associated with lexical quality was related to the emergence of letter knowledge and word decoding. Confirmatory factor analysis evidenced five domains related to lexical quality, i.

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In the Simple View of Reading proposed by Hoover and Gough (1990), reading comprehension is conceived as the product of word decoding and listening comprehension. It is claimed that listening comprehension or the linguistic processes involved in the comprehension of oral language strongly constrain the process of reading comprehension. In several studies, evidence for this theoretical framework has been provided for first language learners.

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Although previous research showed that the thin ideal provided by the media affects body image and eating behaviour in young children, less is known about specific media contents that are related to body image and eating behaviour. This study tested the associations between watching soaps and music television and body dissatisfaction and restrained eating directly, and indirectly through thin ideal internalisation. We conducted a survey in class, in which 245 girls (aged 7-9) completed scales on their television watching behaviour, thin ideal internalisation, body dissatisfaction and restrained eating.

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Emotional and external eating appear to co-occur and both have been shown to correlate to neuroticism, especially depression. However, there is evidence suggesting that emotional and external eating are independent constructs. In this study we revisited the relation between depression, emotional, and external eating.

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Multiple levels of influence should be considered in interventions aimed at the adolescent smoker, including psychological, addiction, peer and parental influences. However, the mechanism by which these variables influence the process of smoking cessation in adolescents is not well elucidated. Therefore, this prospective study tested two models among 850 adolescent smokers, specifying the direct and indirect relations between adolescents' readiness to quit smoking, levels of nicotine dependence, and smoking behavior of their parents and friends.

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The present study addresses the applicability of the Transtheoretical Model's processes of change in explaining adolescents' readiness to quit smoking. Furthermore, the association between nicotine dependence and readiness to quit was assessed both directly, as well as indirectly through the processes of change. A cross-sectional survey was conducted, identifying 1547 weekly smokers aged 14-18 years.

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The goal of the present 1-year long longitudinal study was to determine which home literacy variables were effective in stimulating early reading skills of children with cerebral palsy (CP) directly or indirectly via the reading precursors. Parents of 35 children with CP completed questionnaires regarding aspects of the home literacy environment (HLE). The reading precursors: Vocabulary, Syntactic skills and phonological awareness, i.

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Background: The present study assessed the relative contribution of genes and environment to individual differences in initiation of alcohol use and frequency of drinking among early adolescents and examined the extent to which the same genetic and environmental factors influence both individual differences in initiation of alcohol use and frequency of drinking.

Methods: Questionnaire data collected by the Netherlands Twin Register were available for 694 twin pairs aged of 12 to 15 years. Bivariate genetic model fitting analyses were conducted in mx.

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The present study investigated the possibility of forming a multidimensional scale for the measurement of nicotine dependence among adolescents, based on the modified Fagerström Tolerance Questionnaire (mFTQ) and the Hooked on Nicotine Checklist (HONC). A survey was conducted among 33 Dutch secondary schools, resulting in 2,041 smokers who completed the questionnaire. Motivation to quit and number of quit attempts were assessed and used as convergent construct variables for the construct of nicotine dependence.

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The present study investigated similarities and reciprocal influences in emotional, external and restrained eating in adolescent siblings, and the moderating role of sex and quality of relationship. A total of 415 sibling pairs (aged 13-16 years) participated in this two-wave one-year longitudinal study. Analyses were conducted by means of Structural Equation Modeling.

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Unlabelled: In the present study, the relations of various aspects of working memory to various aspects of language problems in a clinical sample of 97 Dutch speaking 5-year-old children with severe language problems were studied. The working memory and language abilities of the children were examined using an extensive battery of tests. Working memory was operationalized according to the model of Baddeley.

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The Restraint Scale (RS) is a widely used measure to assess restrained eating. The purpose of this study was to examine the construct validity of the RS in a sample of normal-weight (n=349) and overweight (n=409) females using confirmatory factor analyses of the RS in relation to other measures for dieting, overeating and body dissatisfaction. Following Laessle et al.

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Ample studies have established that parents as well as peers function as role models in the development of adolescents' alcohol use. The role of siblings, however, has been largely neglected despite the long-term nature of a sibling relationship. The present study examined the impact of siblings on drinking behavior of adolescents using longitudinal data from 416 sibling dyads.

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Objective: To examine whether dieting--restriction of food intake for the purpose of weight control--suppresses or promotes excessive food intake and weight gain.

Design: A 4-year follow-up study of a dietary intervention in a sample of 97 patients with newly diagnosed Type 2 diabetes.

Main Outcome Measures: Weight gain, change in body mass index (measured weight in kilograms divided by measured height squared), and intake of energy, as measured with a food frequency questionnaire, were assessed in relation to dietary restraint and tendency to overeat (emotionally or externally induced overeating), as assessed with the Dutch Eating Behaviour Questionnaire.

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The present study examined whether specific item characteristics, such as mode of acquisition (MoA) of word meanings, make reading comprehension tests particularly difficult for deaf children. Reading comprehension data on nearly 13,000 hearing 7-to-12-year-olds and 253 deaf 7-to-20-year-olds were analyzed, divided across test levels from second to sixth grade (not necessarily corresponding to chronological age). Factor analyses across item scores suggested that, of the determinants studied, MoA--referring to the type of information (perceptual, linguistic, or both) used in word meaning acquisition--was the only factor that contributed significantly to deaf and hearing children's reading comprehension.

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The present study tested the dual pathway model of Stice [. A review of the evidence for a sociocultural model of bulimia nervosa and an exploration of the mechanisms of action. Clinical Psychology Review, 14, 633-661 and .

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Aims: To determine which alcohol-specific socialization practices are related to adolescents' alcohol use, and to investigate whether parents differ in their alcohol-specific socialization towards their children.

Design: In a sample of 428 families, both parents and two adolescents (aged 13-16 years) completed a questionnaire at home about alcohol-specific parenting and their own alcohol use. Based on the reports of each family member, three different models of alcohol-specific socialization were formulated: from the perspective of the siblings, the mother and the father.

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