"If you're talking to yourself, you're not crazy. In fact, this may be a sign that you are smarter than the average person," the article says. It is noted that this habit can improve memory, positively affect confidence and attentiveness.
Scientists also noted a higher IQ in dreamers, introverts and those who like to stay up late. Another potential indicator of a big mind is considered to be living in a mess - this may indicate non-standard thinking. Reading books is also a factor of high IQ, as it has a positive effect on cognitive functions, developing concentration and imagination.
Earlier, scientists dispelled the popular myth that mental abilities necessarily decrease after the age of 70. According to their data, in some cases they increase.
