The definition of intelligence is complicated. The Cambridge Dictionary defines it as "the ability to learn, understand, and make judgments or have opinions that are based on reason", although in psychology, when measured by IQ tests, it refers to the ...

It's the fatal phenomenon with silent symptoms. Now, there's a clue that might help detect suicidal tendencies. A large, longitudinal Swedish study found that those who performed poorly at school were five times more likely to kill themselves later in life, and ...