“…To theoretically clarify the underlying relationships between the independent and the dependent variables; the current study builds upon the results of previous studies. In this regards, some previous studies (e.g., Halabi & Chowdhury, 2018;Murphy, 2017;Paisey et al, 2007;Paisey & Paisey, 2018;Paisey and Paisey, 2014) indicated that the CPD of accounting, business and financial knowledge have a positive contribution to the quality of the internal audit; likewise, other studies (e.g., Paisey & Paisey, 2018;Tudora, 2013;Mattli & Buthe, 2005;Chersan, 2019;Lee, 1995;Baker, 2005) have indicated that the CPD of the technical competence of the financial auditing has an actual contribution to the quality of the internal audit. Furthermore, a group of studies (Seol et al, 2011;Plant et al, 2019;Kaspina, 2015;Firth et al, 2012;Lenz and Hanh, 2015;Krá l et al, 2017;Siriwardane et al, 2014;Ahmad et al, 2019) showed that the CPD of the professional skills of the internal auditors has a positive contribution to the quality of the internal audit.…”