Psychology 10.1

In binocular rivalry, you see one image in the left eye and an incompatible image in the right eye. What do you perceive?

an alternation between one image and the other

In which of these does a person have the LEAST amount of brain activity and responsiveness?

brain death

Which of the following is characteristic of a "minimally conscious state"?

brief periods of purposeful action and speech comprehension

In which condition does the brain show a low, steady rate of activity and no response to any stimulus?

coma

Which of the following often produces spatial neglect for half of the body?

damage in the right hemisphere of the brain

Damage to the right hemisphere of the brain often leads to which of the following?

tendency to be unconscious of the left side of the body and the world

When researchers measured brain activity during a binocular rivalry task, what did they find?

A consciously perceived image activated large portions of the brain.

What evidence indicated that a woman in a vegetative state may be conscious?

Her brain activity responded to commands such as "imagine playing tennis."

What evidence suggested that some people in a vegetative state are conscious?

Instructions to imagine something activated the same brain areas as in intact people.

What happens to the brain's representation of a sensory stimulus on occasions when people are conscious of it, that does not happen when they are unconscious of it?

The activity spreads through much more of the brain.

Someone with right-hemisphere damage ordinarily neglects the left side of objects. What happens if the person closes his/her eyes and tries to describe a scene form memory?

The description neglects the left side.

Researchers wanted to present a stimulus that would become conscious on some trials and not on others, while keeping the stimulus itself the same. Which of these methods did they use to make the stimulus unconscious?

They presented interfering stimuli before and after the stimulus.

What evidence suggests that we sometimes consciously perceive a stimulus afterward, instead of simultaneously with it?

We don't perceive a brief masked stimulus, but a slightly longer one seems to last the whole duration.