तरल और क्रिस्टलीकृत बुद्धि (fluid and crystallized intelligence) का सिद्धांत किसने प्रस्तावित किया था?

Vikram is a professional athlete who has won many accolades for his country. Recently, he won a gold medal in a world competition. However, he has problems when he talks to his family and friends and cannot forge a successful relationship of any kind. Which of the following theories can explain this?

In his Group Factor Theory of intelligence, Louis Thurstone subdivided the 'Reasoning Ability' into how many distinct parts?