title: Development and test-retest reliability of a research instrument designed to evaluate school-based HIV/AIDS interventions in South Africa and Tanzania.
abstract: OBJECTIVE
  This article reports on the development and psychometric properties of an instrument to evaluate school-based HIV/ AIDS interventions aimed at adolescents in three African sites.
  
  
  METHODS
  The instrument was developed in a series of steps that involved a review of existing instruments; use of empirical data and secondary literature supporting an association between the variables of interest and sexual intercourse or condom use; operationalizing the constructs of the theoretical model employed; and using the objectives of the intervention. Test-retest reliability studies were conducted at each site.
  
  
  RESULTS
  The questionnaire demonstrated good internal consistency and adequate test-retest reliability. Cronbach's alpha was higher than 0.50 for all the 10 psychosocial scales, while Cohen's kappa showed poor to substantial test-retest reliability on the sexual behaviour items (kappa = 0.14 to 0.69).
  
  
  CONCLUSIONS
  We conclude that the instrument had sufficient test-retest reliability and internal consistency.
authors.affiliation: Division of Child and Adolescent Psychiatry, University of Cape Town, Red Cross War Memorial Children's Hospital, South Africa.
authors.forename: Wanjirũ
authors.initials: W
authors.lastname: Mũkoma
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Flisher
authors.forename: Arnfinn
authors.initials: A
authors.lastname: Helleve
authors.forename: Leif Edvard
authors.initials: LE
authors.lastname: Aarø
authors.forename: Catherine
authors.initials: C
authors.lastname: Mathews
authors.forename: Sylvia
authors.initials: S
authors.lastname: Kaaya
authors.forename: Knut-Inge
authors.initials: KI
authors.lastname: Klepp
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology / Q000517:prevention & control / Q000523:psychology; D000293:Adolescent; D000294:Adolescent Behavior; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control* / Q000523:psychology; D006801:Humans; D015397:Program Evaluation; D011594:Psychometrics / Q000379:methods; D015203:Reproducibility of Results; D012574:Schools; D012736:Sex Education; D012725:Sexual Behavior; D013019:South Africa / Q000453:epidemiology; D011795:Surveys and Questionnaires; D013636:Tanzania / Q000453:epidemiology