Resistance,defined as "the use of immature defense mechanisms that are rigid,impulsive,maladaptive,and nonanalytical" can act as a barrier to critical thinking.

Immature Defense Mechanisms

Psychological strategies used unconsciously to protect oneself from anxiety and the perception of social or personal inadequacies.

Critical Thinking

The skill of logically breaking down ideas, identifying fallacies, and understanding arguments.

Resistance

Opposition or pushback against forces or ideas, often manifesting in social, political, or personal contexts.