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BMC Med Res Methodol. 2017 Aug 17;17(1):125. doi: 10.1186/s12874-017-0403-8.

The impact of self-interviews on response patterns for sensitive topics: a randomized trial of electronic delivery methods for a sexual behaviour questionnaire in rural South Africa.

Author information

1
Africa Health Research Institute, Mtubatuba, South Africa. g.harling@ucl.ac.uk.
2
Institute for Global Health, University College London, London, UK. g.harling@ucl.ac.uk.
3
Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, USA. g.harling@ucl.ac.uk.
4
Africa Health Research Institute, Mtubatuba, South Africa.
5
Academic Unit of Primary Care and Population Sciences and Department of Social Statistics and Demography, University of Southampton, Southampton, UK.
6
Africa Health Research Institute, School of Nursing & Public Health, University of KwaZulu-Natal, KwaZulu-Natal, South Africa.
7
Research Department of Epidemiology & Public Health, University College London, London, UK.
8
Department of Global Health and Development, London School of Hygiene & Tropical Medicine, London, UK.
9
Division of Infection and Immunity, University College London, London, UK.
10
Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
11
Institute of Public Health, University of Heidelberg, Heidelberg, Germany.

Abstract

BACKGROUND:

Self-interviews, where the respondent rather than the interviewer enters answers to questions, have been proposed as a way to reduce social desirability bias associated with interviewer-led interviews. Computer-assisted self-interviews (CASI) are commonly proposed since the computer programme can guide respondents; however they require both language and computer literacy. We evaluated the feasibility and acceptability of using electronic methods to administer quantitative sexual behaviour questionnaires in the Somkhele demographic surveillance area (DSA) in rural KwaZulu-Natal, South Africa.

METHODS:

We conducted a four-arm randomized trial of paper-and-pen-interview, computer-assisted personal-interview (CAPI), CASI and audio-CASI with an age-sex-urbanicity stratified sample of 504 adults resident in the DSA in 2015. We compared respondents' answers to their responses to the same questions in previous surveillance rounds. We also conducted 48 cognitive interviews, dual-coding responses using the Framework approach.

RESULTS:

Three hundred forty (67%) individuals were interviewed and covariates and participation rates were balanced across arms. CASI and audio-CASI were significantly slower than interviewer-led interviews. Item non-response rates were higher in self-interview arms. In single-paper meta-analysis, self-interviewed individuals reported more socially undesirable sexual behaviours. Cognitive interviews found high acceptance of both self-interviews and the use of electronic methods, with some concerns that self-interview methods required more participant effort and literacy.

CONCLUSIONS:

Electronic data collection methods, including self-interview methods, proved feasible and acceptable for completing quantitative sexual behaviour questionnaires in a poor, rural South African setting. However, each method had both benefits and costs, and the choice of method should be based on context-specific criteria.

KEYWORDS:

Interview methods; Mixed-methods; Randomized trial; Sexual behaviour; Single-paper meta-analysis

PMID:
28818053
PMCID:
PMC5561578
DOI:
10.1186/s12874-017-0403-8
[Indexed for MEDLINE]
Free PMC Article

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