Does the Moon Really Influence Our Behavior?

Key Points:

• For centuries, the full moon has been associated with unusual human behaviors and increased criminal activity.
• Scientific studies have not found a causal relationship between the moon and human behavior.
• The moon's cultural and spiritual significance may contribute to the belief in its effects.

The phrase "It must be a full moon" is often used to explain strange behaviors, mood swings, and even crimes. This belief dates back to ancient times, with Aristotle and Pliny the Elder suggesting that the moon's light could cause insanity, epilepsy, or violent episodes.

Despite these long-held beliefs, scientific studies have consistently failed to establish a causal relationship between the moon's phases and human behavior. A meta-analysis of 37 studies conducted in 1985 found no link between the full moon and an increase in crisis center calls, suicides, traffic accidents, or psychiatric issues. Numerous modern studies have supported these findings, showing no correlation between the full moon and psychiatric admissions, hospital visits, or traffic accidents.

If scientific evidence does not support the belief that the moon affects our behavior, why does it persist? Several factors may contribute to this enduring superstition.

The Lunar-Consciousness Effect:

A recent article in Discover magazine suggests that the "moon illusion" effect may play a role. This effect causes the moon to appear closer than it is due to the refraction of light, which can disrupt sleep patterns and lead to sleep deprivation and impaired judgment. Some studies have also found that the lunar cycle can affect sleep, potentially explaining some perceived behavioral changes during full moons.

Cultural and Spiritual Significance:

The moon holds cultural and spiritual significance for many people around the world. Native American tribes viewed the moon as a grandmother or moon mother, and full moons were used as a calendar to mark the passing year. In astrology, the moon is associated with emotions and subconsciousness, and its phases are believed to influence behavior. While science may not support these beliefs, they can still influence our perceptions and behaviors.

Confirmation Bias:

Confirmation bias is a cognitive bias that leads us to seek out information that confirms our existing beliefs while ignoring or downplaying information that contradicts them. This bias may contribute to the ongoing belief in the moon's effects on behavior. When we experience unusual or negative events during a full moon, we may be more likely to remember and focus on those events, reinforcing the belief that the moon is responsible.

While scientific studies have largely debunked the notion that the moon directly affects our behavior, the moon's cultural and psychological significance may still influence our perceptions and actions. Whether or not you believe in the moon's influence, it can be an enjoyable and thought-provoking topic to explore.