The auditor's reluctance to apply statistical functions in spreadsheet software indicates a gap in applying analytical and problem-solving skills in complex data environments. This gap relates to critical thinking, which involves understanding logical connections between ideas, identifying the relevance and importance of arguments, and systematically solving problems. Training in critical thinking would equip the auditor to better utilize analytical tools and improve efficiency and effectiveness in auditing tasks.References: Internal auditing educational materials on auditor competencies and skills development