Final answer:
The research indicates that greater activity in the right amygdala predicts sadness and depression, while greater activity in the left amygdala predicts happiness.
Step-by-step explanation:
The question is referring to research on the activation of the amygdala within the right and left hemispheres of the brain and its implications for dispositional emotion.
According to research, greater activity in the right amygdala predicts a tendency toward sadness and depression, while greater activity in the left amygdala predicts happiness.
However, it is important to note that the research on hemispheric dominance and its relationship to emotions is inconsistent, and it is better to think of how the two hemispheres interact in producing emotions rather than attributing specific emotions to one hemisphere.