A friend tells you that "all left­handed people are right­brain dominant." Explain why your friend is mistaken regarding brain dominance and what brain dominance involves, and describe some behavioral clues that may indicate a person's brain dominance

Question

What will be an ideal response

Answer 1

Answer will include that although the right hemisphere controls the left hand, a left- handed person's language­producing, dominant hemisphere may be on the opposite side of the brain. Approximately 95 percent of right-handers process speech in the left hemisphere and are left-brain dominant. About 70 percent of left-handers also produce speech from the left hemisphere, just as right-handed people do. In addition, approximately 19 percent of all lefties and 3 percent of righties use their right brain for language. Some left-handers (approximately 12 percent) use both sides of the brain for language processing. All told, 90 percent of the population uses the left brain for language. Right-handed individuals who write with a straight hand, and lefties who write with a hooked hand, are usually left-brain dominant for language. Left-handed people who write with their hand below the line, and righties who use a hooked position, are usually right-brain dominant. If people gesture mostly with their right hand as they talk, they probably process language in the left hemisphere. Gesturing with the left hand is associated with right-brain language processing. The only sure way to check brain dominance is to do a medical test that involves assessing one hemisphere at a time.