Collected in order to gather comprehensive qualitative & quantitative data on homeless families and a low-income housed comparison group in Worcester, Massachusetts. The major goal was to gain knowledge about the risk factors for homelessness and its impact on the social, emotional, and cognitive development of children. Data included demographics, information on housing, income, education, jobs, family structure, life events, service utilization, personal network, social resources, history of sexual or violent assault, mental health and substance disorders, and health status. Each child was also directly assessed using a battery of developmentally appropriate instruments and questions.