Intelligent individuals often exhibit a natural curiosity, which manifests in their leisure activities. This is the reason certain interests repeatedly show up in studies related to reasoning, memory, learning, and creative success: endeavors that nurture pattern recognition and ongoing problem-solving naturally appeal to those skilled in these areas.
A clarification regarding what the science indicates—and what it does not. Researchers in this field typically assess skill, training, or performance on cognitive examinations rather than simple enjoyment, and their results describe averages among groups with considerable overlap among individuals. Thus, no singular hobby serves as a covert IQ evaluation. What the data does support is a more nuanced view: specific leisure activities are consistently correlated with the cognitive skills measured by intelligence assessments, and having a preference for them reveals something significant about how you prefer to engage your intellect.
The seven pastimes listed below are backed by genuinely noteworthy research. If numerous ones feature in your life, the studies imply you’re among like-minded individuals.
Understanding what this type of evidence can and cannot convey
A relationship can operate in multiple directions. An individual with robust reasoning abilities might be attracted to chess. Engaging in chess may enhance chess-related skills. Factors like education, household income, available leisure time, and access to instruction may affect both the pastime and cognitive test outcomes. All three processes may occur simultaneously.
There’s another differentiation that list-based assertions often overlook: enjoyment does not equate to expertise. A grandmaster and a casual chess player might share a common hobby label, yet they do not possess the same level of practice or skill. Even a genuine correlation between skill and cognitive ability cannot characterize every individual who enjoys the activity.
With this caveat in mind, here are seven hobbies supported by compelling evidence.
Games that encourage structured thinking
1. Engaging in chess
Chess stands out as the most evident candidate, as researchers have made direct comparisons between chess skill and various cognitive abilities. A 2016 meta-analysis published in the journal Intelligence found an average correlation of 0.24 between chess ability and cognitive capacity. The individual estimates were akin for fluid reasoning, acquired knowledge, short-term memory, and processing speed.
This represents a significant yet modest connection. It was more pronounced among younger and unranked players compared to adults and ranked players, and it still leaves many variations in chess skill unexplained. More importantly, the researchers evaluated skill, rather than enjoyment. Enjoying chess may indicate a comfort with patterns, rules, and extended problem-solving, but it does not determine an IQ score.
2. Playing cognitively challenging video games
The evidence regarding gaming is more extensive and complicated since a fast-paced action game, a city-building simulator, and a word puzzle each require different skills. In 2026, researchers synthesized 133 studies involving 14,245 participants across three meta-analyses. They reported small positive links between video game engagement and cognitive abilities, including memory, spatial reasoning, visual attention, cognitive control, and intelligence.
The review encompassed correlations, group comparisons, and controlled experiments, which address different queries. A small average effect also provides limited insight about a specific player. What this hobby may plausibly suggest is a desire for rapid feedback, rule acquisition, and progressively challenging puzzles, especially when the games themselves necessitate those skills.
Pastimes centered around symbols and language
3. Reading for enjoyment
Reading serves as both a means of acquiring knowledge and a sophisticated act of attention, language processing, and inference. A 2023 investigation involving 10,243 participants from the Adolescent Brain Cognitive Development cohort found that earlier engagement in sustained reading for pleasure was correlated with improved cognitive performance during early adolescence. The researchers accounted for socioeconomic background and also executed longitudinal and genetically informed evaluations.
This is compelling evidence, but it doesn’t provide a basis for identifying high-IQ individuals by their book collections. The study focused on childhood reading, and the activity is intertwined with education, home environment, and existing verbal capabilities. A prudent conclusion is that individuals who enjoy