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May 25, 20260 citationsOpen Access

Test-retest reliability of self-reported adolescent addictive and other risk behaviours in Tanzania, South Africa and Zimbabwe

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HCHuman Sciences Research Council

Key Points

  • The aim was to evaluate the reliability of self-reported addictive and other risk behaviors among adolescents using questionnaires in three countries.
  • Questionnaires administered in Swahili, Xhosa, and Shona across three sites: Dar es Salaam, Cape Town, and Harare.
  • Sample size included 119 participants in Tanzania, 104 in South Africa, and 112 in Zimbabwe.
  • Analysis utilized Cohen's kappa for reliability metrics.
  • Reliability was poor for 0 variables, fair for 5 variables, moderate for 16 variables, substantial for 20 variables, and almost perfect for 2 variables according to Cohen's kappa.
  • Observed agreement was above 90% for 22 out of 27 variables, indicating high consistency in self-reported data.
  • All three versions of the questionnaire demonstrated acceptable reliability.

Abstract

The aim was to ascertain the test-retest reliability of a wide range of addictive and other adolescent risk behaviours using questionnaires in Swahili in Dar es Salaam, Xhosa in Cape Town, and Shona in Harare. The sample consisted of 119, 104 and 112 in the three sites respectively. Of the 43 variables for which Cohen's kappa was the appropriate measure, the reliability was poor for 0 (0.0%), fair for 5 (11.6%), moderate for 16 (37.2%), substantial for 20 (46.58%) and almost perfect for 2 (4.7%). Of the 27 variables for which the observed agreement was the most appropriate measure, it was above 90% for 22 (81.5%) variables. All three versions of our questionnaire provide data that is of acceptable reliability.

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Cite This Study

Human Sciences Research Council (2026) studied this question.

synapsesocial.com/papers/6a13e83b0e02ee3982d32df8https://doi.org/10.14749/32383452
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