Development and test-retest reliability of a research instrument designed to evaluate school-based HIV/AIDS interventions in South Africa and Tanzania
Mũkoma, W.ũ; Flisher, A.J.; Helleve, A.; Aarø, L.E.; Mathews, C.; Kaaya, S.; Klepp, K.-I.
Scandinavian Journal of Public Health 37(Suppl 2): 7-15
2009
ISSN/ISBN: 1403-4948 PMID: 19493977 DOI: 10.1177/1403494809103995Document Number: 208296
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. 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. 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). We conclude that the instrument had sufficient test-retest reliability and internal consistency.