Introduces students to practical and conceptual aspects of conducting quantitative research on sex and drug practices. Provides students with the theoretical knowledge and practical skills to conduct quantitative research projects and make sense of published research. Introduces concepts and debates underpinning quantitative research methods; considerations for researching sensitive and stigmatised practices; a background to research design and method; how to formulate research questions; sampling theory; questionnaire design; collecting data; reliability and validity theory; quantitative data analysis; intrepreting, presenting and writing about quantitative data. Includes the hands-on use of SPSS statistical software, of which no prior knowledge assumed.