AbstractObjectiveAnxiety symptoms often increase in late childhood/early adolescence, particularly among girls. However, few studies examine anxiety‐relevant gender differences during anticipation and avoidance of naturalistic experiences during adolescence. The current study uses ecological momentary assessment (EMA) to examine associations among clinical anxiety, gender, anticipation, and attempted avoidance of person‐specific anxiety‐provoking experiences in youth ages 8–18.Method124 youth (73 girls) completed 7 consecutive days of EMA. Seventy participants (42 girls) met criteria for one or more anxiety disorders, while the remaining 54 were healthy controls (31 girls). Participants reported the experience that they were “most worried about happening that day” and completed ratings about that event including whether they attempted to avoid that experience. Multilevel models examined whether diagnostic group (anxious, healthy), gender (boys, girls), or their interaction predicted anticipatory ratings or avoidance of these experiences.ResultsAnalyses revealed significant diagnostic group by gender interactions for anticipatory ratings. Specifically, anxious girls reported greater worry and predicted more negative outcomes related to future experiences. However, only a main effect of diagnostic group emerged for attempted avoidance. Finally, anticipatory worry predicted higher rates of attempted avoidance, but this association did not vary by diagnostic group, gender, or their interaction.ConclusionThese findings extend the literature on the interplay of anticipation and avoidance to person‐specific naturalistic experiences in pediatric anxiety. They reveal that anxious girls report more anticipatory anxiety and worry, while avoidance of real‐world anxiety‐provoking scenarios is a key concern for anxious youth independent of gender. By using EMA to examine person‐specific anxiety‐inducing experiences we can begin to understand how these processes and experiences unfold in the real world.