Stuttering is a fluency disorder which is characterized by prolongations, repetitions, and blocks, which disrupt the flow of speech (Guitar, 2014). There are multiple factors affecting stuttering, including physiological, psychological, environmental, and linguistic (Guitar 2006; 2016; Kang et.al, 2010; Sitek et.al; Smith & Weber, 2017). Self-disclosure has been shown to improve listeners’ perceptions and attitudes towards people who stutter in a positive manner (e.g., Byrd, McGill, Gkalitsiou, & Cappellini, 2017; Byrd, Gkalitsiou, McGill, Kelly & Reed, 2016; Lincoln, Brinker-Katz, 2017). Yet, limited research has explored the physiological and affective changes that speakers who stutter experience when they self-disclose (or do not self-disclose) their stuttering. Bowers and colleagues (2012) examined the relationship between anticipatory autonomic arousal and stuttering during reading tasks. They found that people who stutter presented with decreased skin conductance when stuttering was eliminated. They also reported that people who stutter exhibited increased final heart rate deceleration when a skin conductance response occurred. Bowers et al. (2012) concluded that physiological responses were best determined by the anticipation/possibility of stuttering, rather than speech outcome (fluent or stuttered). These results suggest the importance of further exploring the anticipation of stuttering and its effects on the speaker who stutters in a variety of contexts (other than reading). In the proposed study, we will ask participants to report speaking situations in which they feel least to most comfortable and we will monitor their physiological and affective responses within those situations. Participant self-report of speaking situations will enable ecological validity and inform our clinical practice. We hypothesize that speaking situations participants rate as “least comfortable” will elicit increased heart rate deceleration during a stuttering moment and decreased skin conductance when stuttering moment is finished.