“…When used, pretest or post-test measures were often limited to short participant surveys (Murrant et al, 2000;Nainis, 2005) or not specified (Huet, 2012). Limitations of interventions using empirical measures included: a research protocol where stress was not operationalised (Julliard et al, 2002); the absence of any intervention in the control group (Visnola et al, 2010), which affected the validity of comparisons with the experimental group; and a lack of randomisation of participant allocation (Salzano et al, 2013) that may have affected results positively. However, since the research method most commonly used within art therapy was a case study-based approach using therapist-reported outcomes (Gilroy, 2006), the studies by Visnola et al (2010) and Salzano et al (2013), together with Huet's (2011Huet's ( , 2012 use of audio recordings and thematic analysis, denoted a growing interest in using more rigorous qualitative and quantitative research methodology within art therapy.…”