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The work of internal auditors is relevant to their host entities' reporting processes; however, few researchers have examined how internal auditors’ competency and objectivity affect their resistance to pressure from host entities regarding their reports. Thus, the main objective of this study is to examine the influence of internal audit functions' (IAF) quality factors on chief audit executives' (CAEs) ability not to modify internal audit report.

This study uses data from the Global Internal Audit Common Body of Knowledge to investigate the relationship between IAF quality and auditor resistance to pressure related to changes in internal audit reports. IAF quality is calculated using a composite measure comprising four IAF quality components. Auditors' resistance is measured using the extent to which internal auditors experienced a situation wherein they were directed to modify a valid audit finding in a report.

The analyses provide evidence that CAEs experience, certification, training and objectivity were all significantly associated with resistance to pressure. In other words, a greater quality of IAF leads to a greater ability to resist pressure to change their reports.

Despite the statistically significant results that confirm the impact of IAF competence and objectivity on the resistance of CAEs to pressure, some other factors should be considered simultaneously in future research. In addition, the study sample contains 2,193 CAEs from different regions, environments, sectors and business areas. Focussing on a particular environment, sector or organisation size may generate different results.

The following practical implications are proposed: First, internal audit regulators will find this study helpful in formulating strategies for creating balanced relationships between CAEs and other authorities and users. Second, CAEs can be encouraged to undergo constant training and complete professional development (as required by the Institute of Internal Auditors [IIA] standard). Finally, it would be interesting to apply this study to a particular environment, sector and size.

This study builds on the limited research that investigates the relationship between IAFs’ quality and the resistance of CAEs to pressure. It extends Calven’s (2021) study that investigates the impact of adherence to the IIA's Core Principles on the likelihood of IAFs modifying valid audit findings. This study examines the influence of IAF quality factors on CAEs' ability not to modify internal audit report.