The 2D:4D ratio is an indicator of __________.

Scientists compared the brain development of children raised by their biological parents and those raised in orphanages and found that chemical changes in their brains affected the expression of genes responsible for brain growth. This is an example of:

According to research, genetics likely accounts for about _______ percent of the variance in personality traits.

Francis Galton asked his participants to identify other twins who might want to participate in his study. This technique is called __________.

Ron is high in neuroticism. When he goes on family bike rides, he always rides first in the line since he has a good eye for changes in the environment like a car backing out of a driveway, a large rock, or a pothole. Ron’s brain is more likely to show stronger responses in an area associated with:

Researchers studying the relationship between personality and how emotions are processed in the brain have discovered that:

Lana scores low on conscientiousness which means she also scores:

Based on findings from twin studies, which of your family members has a personality most like yours?

Based on what is known about the relationship between circadian rhythm ange age, which of these people is most likely to be a morning person?

Mari and Cari are siblings born a year and a half apart from one another. Since the time they were children, Mari has tried really hard to be different and unique from Cari. This is an example of the: