Using mystery clients to assess condom negotiation in Malawi: some ethical concerns.

To halt the HIV/AIDS epidemic in Malawi, donors supported the government in promoting safer sex among women who solicit sex with men in and around bars. In 1996, a qualitative study explored the changing dynamics of concurrent sexual partnerships, using a variety of researchers and methods. Although most international ethical research codes prescribe the informed consent of research subjects, the present author, as principal investigator for that study, included the mystery-client method, which omits informants' consent. Five trained, pilot-tested, and closely supervised male researchers contacted 101 bar girls and "freelancing" women in trading and urban centers to assess the women's ability to negotiate condom use. The men posed as clients but were instructed not to have sex with their informants. This approach provided important contextualized information to improve HIV transmission-prevention programs, yet it raises ethical concerns. This article is intended to contribute to the dialogue and debate on ethical research involving mystery clients and to encourage other researchers to share their ethical dilemmas and show how they have addressed them.