decrease in face-to-face social contact can precipitate depression. Time spent
using the Internet cannot be spent in face-to-face social contact, so
psychologists have speculated that sharply increasing Internet use can cause
depression. Studies of regular Internet users have found a significantly higher
incidence of depression among those who had recently doubled the amount of time
they spent using the Internet than among those whose use had not increased.
Hence, the psychologists’ speculation is correct.
of the following is an assumption on which the argument depends?
In general, the reason that the people in the studies had doubled their Internet
use was not that they had earlier experienced a significant decrease in
opportunities for face-to-face social contact.
A sharp decrease in face-to-face social contact is the only change in daily
activity that can lead to an increased incidence of depression.
Using the Internet presents no opportunities for people to increase the amount
of face-to-face social contact they experienced in their daily lives.
Regular Internet users who are depressed will experience an immediate
improvement in mood if they sharply decrease the amount of time they spend on
Before they doubled the time they spent on the Internet, the people who did so
were already more prone to depression than are regular Internet users in
The professor’s tendency to commandeer faculty meetings to promote her personal
agenda quickly inspired resentment among other faculty, who objected to such
many integers from 1 to 900 inclusive have exactly 3 positive divisors?
10 B. 14 C. 15 D. 29 E. 30
n is any prime number greater than 2, which of the following CANNOT be a prime
A. − 4 B. − 3 C. − 1 D + 2 E. + 5