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A two-case uncontrolled report of a single intervention session with no comparator, using a mix of validated scales and qualitative analysis, too limited in scope and design to establish efficacy.
Qualitative IPA study with 16 participants in a single nine-month open-studio setting; descriptive and exploratory rather than hypothesis-testing, producing conceptual frameworks (Oncological Chaos, Ecology of Witnessing) that require validation across diverse populations and settings.
A single-centre RCT with modest sample size showing statistically significant reductions in pain, fear and anxiety with therapeutic play, but lacking effect sizes, confidence intervals, and hard clinical outcomes.