Social physique anxiety (SPA) is unique to how each individual wishes to be perceived and to how the individual responds to others' perceptions of them. Consequently, people differ in the types of situations that may give rise to SPA, the level of anxiety that occurs, and the effects of anxiety on their behavior. In other words, the phenomenon of SPA fits into the social cognitive theoretical framework, with the premise of triadic reciprocity; that is, the individual, behavior, and environment all influence human behavior (Bandura, 1986). Unfortunately, researchers are limited in investigating SPA and related behavior by the lack of a situationally-sensitive measure of SPA. Currently, there is a trait measure, the Social Physique Anxiety Scale (SPAS; Hart, Leary, & Rejeski, 1989). Hence, the only segment of the triad of reciprocity that can logically be investigated using the SPAS is the person-behavior interaction. Of course, the environment, over time, does influence the development of trait-SPA (T-SPA), and, in turn, behavior (Leary & Kowalski, 1995). Research using the SPAS has provided insight into how T-SPA relates to various psychological and physiological indicators of behavior and how it differs among certain groups of people. However, to gain further insight into the phenomenon of SPA, the situation must be considered. Researchers have started to consider the influence and interaction of different types of physical activity and health environments with SPA, but, unfortunately, without a SPA measure that is sensitive to the environment, investigators are limited. For instance, Focht and Hasenblas (2001) hypothesized that high levels of SPA would moderate improvements in affect following exercise. Their hypothesis was not supported, but they astutely noted that their study was limited with no way of assessing the evaluative threat of the environment. To reach the goal of understanding the phenomenon of SPA and its behavioral consequences more thoroughly, both interpersonal and situational factors must be measured. A trait assessment of SPA (SPAS, Hart et al., 1989) is useful, but there is also a need for a state or dispositional measure of SPA to complement the SPAS and advance research. An initial attempt at development of such as scale has been offered by Schultz (2003).