“…The use of OMs in TA has begun to gain some traction among TA researchers and the wider TA community in recent years. This journal, IJTARP, has highlighted a plethora of research, primarily case studies, where OMs have been utilised in evaluating client's response to focussed interventions, such as anxiety and depression (van Rijn and Wild, 2013;Harford, 2013;Harford and Widdowson, 2014). Case study researches using OMs to track client responses to TA treatment have also made important contributions to the sound evidence base of TA clinical practice and effective treatment of mood disorders (Gentelet and Widdowson, 2016;Widdowson, 2011Widdowson, , 2012Widdowson, , 2013Benelli, Revello, Piccirillo, Mazzetti, Calvo, Palmieri, Sambin, and Widdowson.…”