The white part of the eye is the __________.

Research finds that African Americans sleep less-and less well-than White Americans. Some may feel that this is caused by genetics, while others suggest that factors like social class and education may contribute to the difference. Another idea suggests that the stressors of being a minority may also affect sleep. These various ideas are an important example of __________.

The old game show Let’s Make a Deal offered contestants the choice between a visible prize, usually cash, or the prize hidden behind one of three doors. Which of the following abilities would be most useful to those contestants?

What relatively rare sleep disorder involves people acting out the movements and events of their dreams?

According to your authors, one reason why people continue to believe in the existence of ESP is that __________.

Light, a central player in our visual perception of the world, is a form of __________.

Because those with “blindsight” report that they can see nothing but still do better than chance on tests of visual stimuli detection, some theorized that there was a paranormal explanation for their test results. Another hypothesis is that some blind people may use a form of echolocation to “see” what is in front of them. This alternate hypothesis best demonstrates which principle of critical thinking?

The process of selecting one sensory channel and ignoring or minimizing others is called __________.

Brigitta suffers from an eye condition that causes images to be focused in front of her retina instead of directly on it. The result is that she has to wear eyeglasses, and every few years she requires a stronger prescription. What is the name for this particular condition?

The sense of smell is also known as __________.