Feasibility
IUT
RECRUITMENT
Of the 69 patients who met the study criteria, 64 provided written informed consent and were included in the study. The flow of recruitment, an important measure of future RCT feasibility, was good, with an average of 4.6 (SD = 2.7, range = 1–10) patients consenting to participate and being included in the study per month from July 2018 to August 2019. The majority (81%) of participants were women, and the mean duration of GAD was 14 years (Participants in the IUT group attended a mean of 10.5 (SD = 2.0) sessions, and participants in the MCT group attended a mean of 8.5 (SD = 3.1) sessions. An independent sample t-test showed that participants in the IUT group attended significantly more sessions (t = 3.15, p = .003, d = 0.78). Seven participants (10.9%) dropped out during the treatment period (In the total sample, participants believed that the number of measures was “lagom” (just right) (M = 3.25, SD = 0.88). They viewed being recorded during the sessions neither positively nor negatively (M = 3.53, SD = 1.25) and thought the pace of treatment was “lagom” (M = 3.29, SD = 0.70). Furthermore, participants believed to some extent that their problems had predominantly psychological causes (M = 4.69, SD = 1.22). Overall, they were satisfied with participating in the study (M = 5.17, SD = 1.09). There were non-significant between-group differences in means (ts = -0.79–1.75, ps = .085-.735, ds = 0.09–0.46), except for the number of measures. Participants in the MCT group believed to a larger extent that there were too many measures than participants in the IUT group (On average, the four IUT therapists treated eight participants each (range = 4–12), and the six MCT therapists five participants each (range = 2–10). For IUT therapists, the CTS-R item mean was 2.9 (SD = 0.4), representing a level of competence between “advanced beginner” and “competent”, and close to the corresponding widely adopted competence threshold mean item score of 3 [