We asked six intelligence and psychology experts if IQ can improve through practice. Their answers challenge popular beliefs about brain training. From psychologists to neuropsychologists, these experts weigh in on whether intelligence can be enhanced through dedicated practice. The results might surprise you.Ian Silver has answered UncertainAn expert from University of Cincinnati in Intelligence, Behavioural Science, Social SciencesIQ - or intelligence - scores generally represent a composite score across a variety of different traits (e.g., problem solving, verbal reasoning, logic). While scores on an IQ test can vary, the underlying traits tend to be developed early on in the life-course and remain relatively stable over time. This is not to say that intelligence can't change, but it requires a concerted amount of effort to improve the underlying traits simultaneously. Most practice modalities, such as the phone applications or online courses, will not increase IQ scores or intelligence generally. Research, however, has shown that some medical (e.g., fish oil) or environmental (e.g., educational courses) can improve simultaneously improve the underlying traits in the short term and potentially increase IQ scores.