“…These flexibility processes gradually interacting with one another produce greater psychological flexibility or inflexibility processes interact with one another and cause psychopathology. In other words, ACT is about providing room for pain and helping clients to move forward toward chosen values to create a meaningful life and enhancing the quality of life and/or addressing issues, which is the main duty of mental health providers (Tanhan, 2018 (Kyllönen, Muotka, Puolakanaho, Astikainen, Keinonen, & Lappalainen, 2018;Pleger, Treppner, Diefenbacher, Schade, Dambacher, & Fydrich, 2018;Proctor, Moghaddam, Evangelou, & Das Nair, 2018;Puolakanaho et al, 2019), obsessive compulsive disorder (Rohani, Rasouli-Azad, Twohig, Ghoreishi, Lee, & Akbari, 2018;Twohig et al, 2018), cancer related psychological issues (González-Fernández, Fernández-Rodríguez, Paz-Caballero, & Pérez-Álvarez, 2018;McClure, Bricker, Mull, & Heffner, 2019;Wells-Di Gregorio et al, 2019), chronic pain (Razavi, Aboalghasimi, Akbari, & Nadirinabi, 2019), migraine (Grazzi, Bernstein, Raggi, Sansone, Grignani, Searl, & Rizzoli, 2019), sleep issues (Päivi, Sitwat, Harri, Joona, & Raimo, 2019;Wiklund, Linton, Alföldi, & Gerdle, 2018), suicide prevention (Bazley & Pakenham, 2019;Ducasse et al, 2018), psychosis (Spidel, Daigneault, Kealy, & Lecomte, 2019). In addition, online versions of ACT RCTs were conducted to address various issues including pain (Lin et al, 2017;Simister, Tkachuk, Shay, Vincent, Pear, & Skrabek, 2018), depression (Molander et al, 2018), stress (Hofer et al, 2018), and smoking (Bricker, Mull, McClure, Watson, & Heffner, 2018).…”