Michel Claes

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Being part of a delinquent group has been shown to facilitate the expression of an individual's own delinquent propensities. However, this facilitation effect has not been investigated from a developmental perspective within a population heterogeneity model. Using a semiparametric mixture model with data from the Montreal Longitudinal Experimental Study,(More)
This longitudinal study examined personal-accentuation and contextual-amplification models of pubertal timing. In these models, individual and contextual risk factors during childhood and adolescence can magnify the effects of early or late puberty on depression symptoms that occur years later. The moderating role of prepubertal individual factors(More)
The objective of this study was to examine parental practices, such as affection, control and conflict, in three countries: Canada, France and Italy. The sample was composed of more than 900 late adolescents with an average age of 17 years, from three large cities: Montreal, Paris and Rome. Participants answered a self-report questionnaire that assessed(More)
A questionnaire evaluating the friendship network, the expectations towards friends, the level of intimacy and attachment with friends, as well as the presence of conflicts with friends, was administered to 349 adolescents. The sample consisted of both males and females, age ranging from 12 to 18 years. Subjects were also given various personal adjustment(More)
This study compares two dimensions of parenting-emotional bonding and control-as perceived by adolescents living in three countries: Canada (province of Québec), France, and Italy. A cross-sectional sample was composed of 1256 adolescents who filled out a self-report questionnaire. Multiple Correspondence Analyses provided a graphic synthesis of(More)
As capacity demands for magnetic tape storage systems grow, servo actuator design for tracking data on high density tape media presents new modeling and control design challenges. In this paper a frequency weighted subspace identification algorithm is presented for control relevant model estimation of a tape servo actuator. Common to other subspace(More)
  • M Claes
  • Santé mentale au Québec
  • 1988
Making friends plays a major part in one's adolescent social life. This article profiles peer influence and friendship evaluation during adolescence. A pilot research program conducted on 195 adolescents aged 14 to 18 shows a number of significant correlations between quantitative and qualitative aspects of friendships and various aspects of mental health,(More)
This article reviews recent studies which have examined various aspects of friendship relations in adolescence. Friendship relations are of central importance in the social life of adolescents because they assume a crucial role in certain developmental functions: emancipation from parental guardianship, commencement of heterosexual relations and affirmation(More)
This study examined the construct validity of adolescent alienation using second-order confirmatory factor analysis of the five dimensions conceptualized by Seeman (1959). Analysis was based on data from 275 high school students aged 14 to 18. The hypothesized multidimensionality of the construct was confirmed for both boys and girls using a second-order(More)