A study by economists from Claremont Graduate University and Wuhan University has uncovered four distinct categories of human thought patterns, based on analysis of over 23,000 real-time responses from 258 volunteers.

The research, published as a preprint, reveals people's thoughts cluster into groups: worriers focused on global issues and safety, domestics preoccupied with household matters, bodily thinkers attuned to physical sensations, and work-hard, play-hards balancing career and leisure.

The study tracked participants' thoughts via an app that beeped eight times daily for two weeks, capturing insights into how work, relaxation, and basic needs dominate mental activity.

Key findings include 50% of thoughts related to work during the day and entertainment in the evening, with food and drink accounting for nearly half of all desired thoughts.

The research challenges assumptions about human cognition, showing the mind is rarely blank and highlighting the influence of factors like sleep, health, and social connections on thought patterns.