This report discusses the measurement of behavioral and attitudinal aspects of young children's socioemotional development and briefly describes a variety of instruments designed to measure such development. Information given for each instrument includes: author, source, variables examined, type of measure, age of children test is designed for, and brief comments about the test. Three major types of interactions (peer, adult and task) are discussed in relation to three levels of contextual variables (geographic and ethnic, situational antecedents, and person with whom interaction occurs). Observational instruments used to assess the development of specified behaviors and attitudes vary with each of the selected dimensions. Among the attitudes examined in the measures described are self concept and school related attitudes. Parental role expectations, peer interaction behavior, classroom behavior and child task interaction are also discussed. In addition, other measures of socioemotional development and the child's social role perception and integration are outlined. Appendices include information on developmental screening tests and observational measures. (CM)