Visual acuity is sharpest when images are focused on the fovea because there is a high concentration of which of the following in this region?

A key feature of ________ disorder is psychological problems manifested in bodily symptoms, and physical complaints

a. bipolar b. dissociative c. organic mental d. somatic symptom disorders e. hallucinatory

When might a researcher find a "cohort effect"?

a. If a researcher compares the same people before and after a traumatic event b. If a researcher compares people who were born in different eras c. If a researcher compares people who have different hobbies and interests d. If a researcher compares people of different heights and weights