May 2020 LSAT
Section 3
Question 14
Emil-Kunkin on September 18, 2023
Hi, I don't think that the argument needs to assume this. The psychologist argues that since extroverts have less of an increase in heart rate when they talk than do introverts, the act of speaking alone cannot be the sole cause of the increase. So, it is likely that what causes the increase is stress, since extroverts we assume have more stress when taking than do introverts. That is, what we are trying to strengthen is the idea that increases in heart rate while speaking are not caused solely by the physical exertion of speaking but also by the stress of communication.