Findings of the present meta-analysis indicate that music therapy provides short-term beneficial effects for people with depression. Music therapy added to treatment as usual (TAU) seems to improve depressive symptoms compared with TAU alone. Additionally, music therapy plus TAU is not associated with more or fewer adverse events than TAU alone. Music therapy also shows efficacy in decreasing anxiety levels and improving functioning of depressed individuals.Future trials based on adequate design and larger samples of children and adolescents are needed to consolidate our findings. Researchers should consider investigating mechanisms of music therapy for depression. It is important to clearly describe music therapy, TAU, the comparator condition, and the profession of the person who delivers the intervention, for reproducibility and comparison purposes.

Literature on snowball sampling and other ascending methodologies (intensive data collection methodologies) is widely scattered. In order to indicate a structure in the diversity of articles, snowball sampling and other ascending methodologies are embedded in the general concept of link-tracing methodologies. From this point of view link-tracing methodologies are considered as tools for analysing social structure and for locating members of special populations. By introducing a new theoretical concept for defining special populations, a subdivision is made in link-tracing methodologies as a tool to locate rare populations and as a tool to locate hidden populations. Hidden Populations, Rare Populations, Ascending Methodologies, Link-Tracing Methodologies, Social Network Analysis.Résumé. Populations rares, populations cachées, et des dessins suivie-de-liens: pourquoi et comment? La littérature sur l'échantillonage par boule de neige et d'autres méthodologies ascendantes (méthodologies de collecte intensive de données) est très éparpillée. Pour indiquer une structure dans cette diversité d'articles, l'échantillonage par boule de neige and autres méthodologies ascendantes sous plongés dans le concept plus général de méthodologie suivie-de-liens. De ce point de vue, les méthodologie suivie-de-liens sont considérées comme des outils pour analyser des structures sociales and pour situer des membres de populations spéciales. En introduisant un nouvel concept théorique pour définir des populations spéciales, une sub-division est faite & a g r a v e ; l'intérieur des méthodologies suivie-de-liens entre celles pour situer des populations rares et celles pour situer des populations caché

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This study has examined the predictive validity of the Historical Clinical Future [Historisch Klinisch Toekomst] Revised risk assessment scheme in a cohort of 347 forensic psychiatric patients, which were discharged between 2004 and 2008 from any of 12 highly secure forensic centers in the Netherlands. Predictive validity was measured 2 and 5 years after release. Official reconviction data obtained from the Dutch Ministry of Security and Justice were used as outcome measures. Violent reoffending within 2 and 5 years after discharge was assessed. With regard to violent reoffending, results indicated that the predictive validity of the Historical domain was modest for 2 (area under the curve [AUC] = .75) and 5 (AUC = .74) years. The predictive validity of the Clinical domain was marginal for 2 (admission: AUC = .62; discharge: AUC = .63) and 5 (admission: AUC = .69; discharge: AUC = .62) years after release. The predictive validity of the Future domain was modest (AUC = .71) for 2 years and low for 5 (AUC = .58) years. The total score of the instrument was modest for 2 years (AUC = .78) and marginal for 5 (AUC = .68) years. Finally, the Final Risk Judgment was modest for 2 years (AUC = .78) and marginal for 5 (AUC = .63) years time at risk. It is concluded that this risk assessment instrument appears to be a satisfactory instrument for risk assessment.

The marginalization theory of life histories implies that drug users who are considered as marginalized manifest more serious social, economical, physical, and psychological problems than nonmarginalized drug users. The degree of marginalization is assumed to be an indicator of homelessness. The theory argues that homelessness is a stage in the life of a user that is associated with the loss of control of use. In this paper the effects of the dimensions of marginalization on homelessness are reported. The marginalization theory emerged from ethnographic fieldwork research among the drug users population in Parkstad Limburg, the Netherlands. Ethnographic fieldwork is often restricted to a (selective observed) part of the total population. To verify whether the marginalization theory was valid for the total unknown population, we used quantitative data obtained in 1999 by a two-mode network sample (n = 58). As a conclusion homelessness was more likely to be present among marginalized than nonmarginalized drug users.

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