You may have met someone pretending to be smarter than they are. They try to use big words or bring up their important-sounding hobby or job. They may even put on thick glasses and wear shirts with collars. However, they tend to be aggressive and argumentative because they always have to be right. They ignore the feelings of other people and blame them for their own mistakes. You notice that they believe they are smarter and more competent than they actually are. However, while signs of stupidity can be obvious, signs of intelligence are often more subdued.
Empathy
Strong empathy is a key aspect of emotional intelligence. While emotional intelligence is about understanding and expressing emotions in a healthy way, awareness of other people’s emotions is much harder. People with high empathy can sense what other people are feeling, often through subtle shifts in their behavior and body language.
Empathy could also make a person more considerate and accepting of others’ different experiences, even if they had not experienced that themselves. Plus, empathy is a skill that could be developed the more it is used. This could mean learning more about others and expressing concern for them. Even reading fiction could increase a person’s empathy.
Solitude
Many types of intelligent people enjoy spending time in their own heads, reflecting, brainstorming, and solving. They still enjoy spending time with friends and family, but the more they are busy socializing, the less time they have for introspection and pursuing their interests and hobbies. They still cherish their relationships, but they tend to have few close friends as opposed to a large social circle. The self-awareness of what a person prefers in terms of social interaction is actually another sign of intelligence.
Staying Up Late
Night owls, rejoice. Research has found that people who are inclined to stay up late may tend to be more intelligent. One 2009 study analyzed the connection between childhood IQ scores and the sleep habits of thousands of teens. Those who scored higher on the IQ tests tended to stay up later than those who scored less. Another study from 1999 analyzed the sleep habits of 400 U.S. Air Force recruits and found the same results.