Normative assessments are frequently used to assess children and adults in a multitude of settings. Normative assessments use large samples from a given population from which inferences can be made to individuals who share the characteristics of those in the standardization sample. Ecological assessments employ more direct assessments of behaviors within a particular setting. Normative assessments do not consider setting events or their influence on an individual's behavior. Functional behavior analysis and rotation scans are forms of ecological assessment that assess setting event variables and their relationship to one or more individuals' behavior within a particular setting. Unlike conventional normative assessment strategies, ecological assessment systems provide a basis for treatment grounded in the functions of behavior and the influence of setting variables. This paper describes a rotation scan procedure that provides simple and reliable recording and automatic graphing features. KEYWORDS: ecological assessment, rotation scan, automatic graphing, functional behavior assessment, setting events Ecological assessment has a long history within behavioral psychology. Much of the interest in this assessment stems from the work of field theorists like J. R. Kantor. Kantor's (1959) interbehavioral field theory stresses a multifactor approach and the interdependent nature of stimulus, response, setting events, and interactional history. Bijou and Baer (1961) used Kantor's notion of a setting event and defined it as "a stimulus-response interaction which…will affect other stimulus-response interactions which follow it" (p. 21). In a classic article,