The Cognitive Resource Theory (CRT) proposes that a leader's cognitive ability only contributes to team performance when the leader takes a directive approach. Under CRT, stress affects the relationship between a leader's intelligence and decision quality, while experience is positively related to decision quality under high stress. For simple tasks, CRT argues that leader intelligence and experience are irrelevant. The theory helps predict leadership effectiveness in stressful situations and suggests testing leaders' intelligence and stress management in addition to leadership qualities. However, CRT has been criticized for not defining intelligence and not covering different stress types.