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2. Principal components analysis and exploratory factor analysis: definitions, differences, and choices;Brown;Shiken: JALT Testing & Evaluation SIG Newsletter,2009
3. The House-Tree-Person projective drawing technique: Manual and interpretive guide;Buck,1992
4. The effectiveness of art therapy interventions in reducing post traumatic stress disorder (PTSD): Symptoms in pediatric trauma patients;Chapman;Art Therapy: Journal of the American Art Therapy Association,2001
5. Does art improve mood? A test of key assumptions underlying art therapy;De Petrillo;Art Therapy: Journal of the American Art Therapy Association,2005