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Psychometric studies of the Swedish version of the Adolescent Drug Abuse Diagnosis (ADAD) instrument
Umeå University, Faculty of Social Sciences, Department of Psychology.
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis describes studies into the psychometric properties of a Swedish language version of the Adolescent Drug Abuse Diagnosis (ADAD) instrument. The psychometric properties of this instrument have been examined in two previous studies: an American study was conducted by the developers of the interview, Friedman and Utada (1989), and a Swiss study was undertaken by Bolognini et al. (2001). The American and the French (as used in the Swiss study) versions of ADAD exhibit good validity and reliability, in the form of both interrater reliability and the internal consistency of the composite scores. Study I evaluated the psychometric properties of the Swedish version of the ADAD interview in normal adolescents and adolescents with antisocial problems. It was found that the instrument has good interrater reliability, that the composite scores exhibit moderate internal consistency, and that the concept validity was acceptable and similar to that of the American and Swiss versions. The results also showed that the problem areas of ADAD produced meaningful correlations. The interviewer ratings, the adolescent’s ratings and the composite scores were compared and discussed. Some problems concerning the composite scores were discovered and will need to be analyzed in future studies. Study II investigated the utility and problems associated with the composite scores in the ADAD within and between normal adolescents and adolescents with antisocial problems. When comparing interviewer severity ratings and composite scores within the two groups, the composite scores were found to behave differently to the interviewer ratings. For normal adolescents, the composite scores are generally higher than the interviewer ratings, but for the adolescents with antisocial problems the reverse is true. The interviewer severity ratings seem to be the most appropriate outcome when the objective is to separate antisocial and normal groups of adolescents from each other. The difference between the two groups is smaller as measured by composite scores. The composite scores appear to function as viable indicators of current problems in all areas except for Medical and Alcohol problem area. The critical items within the Medical and Alcohol composite scores are explored and discussed.  Study III investigated the concurrent and predictive validity of the ADAD Psychological status and problem area. Concurrent validity was demonstrated by significant correlations between the ADAD, Youth Self Report (YSR) and Beck Depression Inventory (BDI) scores. The predictive validity of this problem area of the ADAD was tested by exploring its correlations with the YSR, BDI, and DICA problem ratings; moderate correlations were observed, suggesting that in clinical practice, the ADAD Psychological status and problem area may be a useful tool for the assessment and measurement of current psychological problems. The utility obtained by making decisions using the test is substantial. Overall, the results of these studies indicate that the Swedish version of ADAD appears to be a psychometrically good instrument for assessing the severity of adolescents’ problems and their need for treatment, but there are some problems with the Medical and Alcohol composite scores.

Place, publisher, year, edition, pages
Umeå: Institutionen för Psykologi, Umeå universitet , 2011. , 58 p.
Keyword [en]
ADAD, validity, reliability, assessment, psychometric, severity index, composite score, normal; antisocial adolescents, psychological health
National Category
Psychology (excluding Applied Psychology)
Identifiers
URN: urn:nbn:se:umu:diva-49692ISBN: 978-91-7459-317-4 (print)OAI: oai:DiVA.org:umu-49692DiVA: diva2:456629
Public defence
2011-12-08, Norra Beteendevetarhuset, hörsal 1031, Umeå universitet, Umeå, 13:00 (Swedish)
Opponent
Supervisors
Available from: 2011-11-17 Created: 2011-11-15 Last updated: 2011-11-15Bibliographically approved
List of papers
1. The psychometric propeerties of the Swedish version of the Adolescent Drug Abuse Diagnosis (ADAD)
Open this publication in new window or tab >>The psychometric propeerties of the Swedish version of the Adolescent Drug Abuse Diagnosis (ADAD)
2007 (English)In: Nordic Journal of Psychiatry, ISSN 0803-9488, E-ISSN 1502-4725, Vol. 61, no 3, 225-232 p.Article in journal (Refereed) Published
Abstract [en]

The psychometric properties of the Swedish version of the Adolescent Drug Abuse Diagnosis (ADAD) instrument were evaluated in two adolescent groups. The participants in the Normal group comprised 121 adolescents aged 15-17 years and the participants in the group of adolescents with antisocial problems comprised 1168 youths aged 10-21 years detained under the Swedish Care of Young Persons Act in special youth homes. The ADAD instrument produced good interrater reliability; the subscales showed moderate internal consistency and concept validity was satisfactory and comparable with American and Swiss versions. Finally, the ADAD subscales produced meaningful correlations. The interviewer rating, the adolescent’s rating and the composite scores are compared and discussed. The Swedish version of ADAD appears to be a psychometrically good instrument for assessing the severity of adolescent problems and their need for treatment. However, the composite scores need to be reconstructed to be useful in future research.

Keyword
ADAD, adolescents, antisocial, assessment, normal, psychometric
National Category
Psychology
Identifiers
urn:nbn:se:umu:diva-16158 (URN)10.1080/08039480701352678 (DOI)
Available from: 2007-08-22 Created: 2007-08-22 Last updated: 2017-12-14Bibliographically approved
2. Measurments instruments scales tests: The Adolescent Drug Abuse Diagnosis composite scores in Swedish normal and antisocial adolescents
Open this publication in new window or tab >>Measurments instruments scales tests: The Adolescent Drug Abuse Diagnosis composite scores in Swedish normal and antisocial adolescents
2008 (English)In: Substance Use & Misuse, ISSN 1082-6084, E-ISSN 1532-2491, Vol. 43, no 10, 1411-1423 p.Article in journal (Refereed) Published
Abstract [en]

The present study evaluates the utility and issues around the composite scores in Adolescent Drug Abuse Diagnosis (ADAD). Participants were Swedish normal adolescents (121) and adolescents manifesting antisocial problems (1,168), ages 10 to 21. The results show that the interviewer severity ratings seem to be the most appropriate outcome when the objective is to differentiate between normal and antisocial adolescents. The composite scores appear to function as an indicator of current problems in all areas except for Medical and Alcohol sections. The critical items within the Medical and Alcohol composite scores are explored and discussed.

Keyword
ADAD, assessment, severity index, composite scores, normal, antisocial, adolescents
National Category
Psychology
Identifiers
urn:nbn:se:umu:diva-10390 (URN)10.1080/10826080801925465 (DOI)
Available from: 2008-09-22 Created: 2008-09-22 Last updated: 2017-12-14Bibliographically approved
3. Concurrent and predictive validity of the Adolescent Drug Abuse Diagnosis (ADAD)
Open this publication in new window or tab >>Concurrent and predictive validity of the Adolescent Drug Abuse Diagnosis (ADAD)
2012 (English)In: Open Psychology Journal, ISSN 1874-3501, Vol. 5, 20-30 p.Article in journal (Other academic) Published
Abstract [en]

The concurrent and predictive validity of the Adolescent Drug Abuse Diagnosis (ADAD) in the Psychological status and problem area was examined for two adolescent groups: a non-clinical population of 121 Swedish adolescents (62 girls and 59 boys) aged 15 to17 years and a clinical population of 31 adolescents (14 girls and 17 boys) aged 12 to 19 years detained in special youth homes. Concurrent validity was demonstrated by significant correlations between the ADAD, Youth Self Report (YSR) and Beck Depression Inventory (BDI) scores. Findings regarding the predictive validity of ADAD show moderate associations with YSR, BDI and DICA problem ratings. The findings suggest that for clinical practice the ADAD Psychological status and problem area may be an appropriate assessment tool for measurement of current psychological problems. The utility obtained by making decisions using the test is substantial.

Place, publisher, year, edition, pages
Bentham Open, 2012
Keyword
ADAD, adolescents, psychological health, validity
National Category
Psychology (excluding Applied Psychology)
Identifiers
urn:nbn:se:umu:diva-49677 (URN)
Available from: 2011-11-15 Created: 2011-11-14 Last updated: 2012-11-15Bibliographically approved

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