Functional measures are differentially influenced by mood. Self-reports are influenced by apathy symptoms and related motivational changes. Relations between mood and performance-based tasks may depend on symptom types, performance-based variables, and interactions with cognition. Comprehensive assessments should include multiple everyday function measures.
Halberstadter et al. (Sun,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: