Question

In a series of studies, research participants were informed that personality test results indicated they were the type likely to end up alone later in life. as a result, they became ________ likely to underperform on aptitude tests and ________ likely to become aggressive toward those who had excluded them.

Answer 1

Answer:

In a series of studies, research participants were informed that personality test results indicated they were the type likely to end up alone later in life. as a result, they became less likely to underperform on aptitude tests and more likely to become aggressive toward someone who had insulted them.

Explanation:

This example demonstrates how human behavior and personality can be shaped according to the stimulus they receive from the outside, when the individuals knew that they were highly likely to be on their own later in life, they subconsciously became aware that they needed to do everything by themselves and they were also very defensive of that, pushing away anyone who might look like a threat

Answer 2

The answer is less and more (respectively).

To complete the sentence and to get the idea of the phrase:

They became less likely to under-perform on aptitude tests and more likely to become aggressive toward those who had insulted them.