Three-year research project that examines the effect of stress and minority identity related to sexual orientation, race/ethnicity and gender on mental health. Describes social stressors that affect minority populations, explores the coping and social support resources that they utilize as they confront these social stressors, and assesses the associations of stress and coping with mental health outcomes including mental disorders and wellbeing. Also explores the impact of various identity characteristics -- such as whether an identity is viewed positively or negatively, or whether it is prominent or not -- on the relationship of stress and mental health outcomes. The study, using extensive quantitative and some qualitative measures, is a longitudinal survey of 525 men and women between the ages 18 and 59 who are residents of New York City. Socio-demographic information collected about respondents included age, education (i.e., highest grade completed ranging from some high school to doctoral degree), race, and Hispanic ethnicity, adopting the measures developed and used by the United States Census Bureau in the United States population survey of 2000. In addition to these items, racial/ethnic identity was also assessed with the question 'What is the country of origin related to your or your family's ethnic or national background, if any?' Respondents were allowed to select up to two nations from a comprehensive listing. For the purposes of the study, the instrument also assessed whether or not participants were natives of New York City or migrated as adults. Additional demographic variables include employment status, religion, relationship status, and sexual orientation.