“…Dose responses have been reported in previous REBT literature (Turner, Slater, & Barker, 2015), RATIONAL SELF-TALK and therefore session-number is an important consideration. Past research has utilized three (e.g., Turner & Barker, 2013), four (e.g., Cunningham & Turner, 2016), five (Davis & Turner, 2019), and six (Turner et al, 2018b) sessions, and Turner and Barker 2014 suggest seven sessions of 30-45-minute length each. All of these lengths are in line with the extant REBT guidelines for brief intervention work (Ellis, Gordan, Neenan, & Palmer, 1997), but five sessions were selected in the current study based on a recent paper that adopted a similar idiographic single-case design targeting similar outcome variables (Davis & Turner, 2019).…”