there is actually a more quantitative basis for this than MBTI: http://www.ncbi.nlm.nih.gov/pubmed/11220447 http://www.ncbi.nlm.nih.gov/pubmed/11220447 We need

there is actually a more quantitative basis for this than MBTI: http://www.ncbi.nlm.nih.gov/pubmed/11220447 http://www.ncbi.nlm.nih.gov/pubmed/11220447 We need more experiments on this. A possible way to become an extravert, should one want to, is to become better at multitasking. (However, that research suggests that introverts are worse at picking up social cues --- only when they are already engaged in some other task, e.g. talking.)