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Development and Factorial Validation of the Inventory of Deliberate Self-Harm Behaviours for Portuguese Adolescents

  • Eva DuarteEmail author
  • Maria Gouveia-Pereira
  • Hugo S. Gomes
Original Paper
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Abstract

Deliberate self-harm (DSH) is a public health problem that mainly affects adolescents and young adults. Evidence suggests that multiple methods are used with a self-aggressive intent. The present article focuses on the development and factorial validation of the Inventory of Deliberate Self-harm Behaviours for Portuguese adolescents. This instrument assesses the lifetime frequency of 13 DSH methods, with and without suicidal intent. Study 1 consisted of an exploratory factor analysis with a sample of 131 adolescents with a reported history of DSH. Results revealed a three-factor structure with acceptable internal consistency: High Severity DSH, Mild Severity DSH, and Substance Use DSH. After item reduction, this structure was tested in Study 2 through a confirmatory factor analysis with an independent sample of 109 adolescents also with a history of DSH. Results showed an acceptable model fit. This instrument presents a solid structure and acceptable psychometric properties, allowing its use in further research.

Keywords

Deliberate self-harm Methods Validation Adolescents Factor analysis 

Notes

Compliance with Ethical Standards

Ethics Approval

This research was approved by the General Education Directorate of the Ministry of Education and Science from Portugal. All procedures performed in both studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.

Informed Consent

Informed consent was obtained from all individual participants included in the study.

Conflict of Interest

Eva Duarte, Maria Gouveia-Pereira, and Hugo S. Gomes declare that they have no conflict of interest to disclose.

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Authors and Affiliations

  1. 1.CIE-ISPAISPA – Instituto UniversitárioLisbonPortugal
  2. 2.CIPsi - Psychology Research Center, Victims, Offenders and Justice System Research Unit, School of PsychologyUniversity of MinhoBragaPortugal

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