Your brain is a miser that hates spending mental effort

Health · Published 7 October 2026 Swipe more like this →

In short: Just as a miser avoids spending money, your mind seeks to avoid spending cognitive effort. Rather than engaging in sophisticated, energy-intensive reasoning, humans tend to rely on mental shortcuts and simplified strategies to navigate a complex world.

Introduced by psychologists Susan Fiske and Shelley Taylor in 1984, the cognitive miser theory suggests that because human processing capacity is limited in time, knowledge, and attention, we rely on heuristics—such as schemas, scripts, and stereotypes—to make inferences. This stands in contrast to the earlier 'naïve scientist' model proposed by Fritz Heider in 1958, which posited that humans act with dispassionate rationality and detailed thought processes.

This drive to conserve energy can influence how we adapt to new information. Recent research suggests that the avoidance of cognitive demand can actually motivate us to regulate our mental control. Specifically, studies using task-switching paradigms found that when cognitive demand is associated with task repetitions, it can increase cognitive flexibility. However, associating demand with task switches failed to increase stability.

This balance between stability and flexibility is vital for daily functioning. Stability involves a rigid, focused state that suppresses distraction, while flexibility allows for a relaxed state where goals can be updated to meet unexpected changes. When this regulation fails, it can lead to clinical issues: extreme flexibility is observed in attention deficit hyperactivity disorder (ADHD), while extreme stability is associated with obsessive-compulsive disorder (OCD) and autism.

The miserly nature of the mind also impacts how we perceive new technologies. Researchers surveyed 1,002 Singaporeans about autonomous delivery drones, discovering that objective knowledge did not directly dictate public support. Instead, acceptance was driven by heuristic cues, such as news media attention and perceived source credibility, reinforcing the idea that we often favor mental shortcuts over deep knowledge.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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