To estimate the between- and within-individual consistency of the individual zones of optimal functioning (IZOF)-based emotion profiles describing successful and: unsuccessful (sub-standard) performance situations. Method:The methodology of generalizability theory (GT) was applied to two multifaceted measurement designs in studies of 12 highly skilled ice-hockey players assessed by the 28-item aggregated sport-specific emotion scale (Study 1) and a single-case involving elite soccer player (Study 2) using self-generated individualized emotion scale, respectively. Results: A unique and specific interaction of emotions (the IZOF-"iceberg" or bell-shaped profile) characterized successful performance situations in both Study 1 and 2. This pattern with predominance of optimal pleasant and unpleasant emotions was consistently revealed in between- and within-individual comparisons. In contrast, failure (or sub-standard performance) could not be characterized in terms of one unique and specific profile. However, the findings clearly motivate future research to identify multiple emotion profiles to conceptualize sub-standard performance. The paper offers hypotheses to guide future research. Conclusions: Findings provided support for conceptualizing performance situations in terms of relatively stable optimal and dysfunctional patterns of interaction of pleasant and unpleasant emotions. Results also demonstrate that GT is a methodology that can accommodate idiographic as well as nomothetic approaches to estimating within-individual and between-individual consistency patterns of performance-related emotions.
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