Researchers studied language development in the same group of children every year over a five-year period. This research design is called:

The __________ variable is the variable that is manipulated or controlled by the experimenter.

_________ is the perception of body position.

Barbara is getting brain imaging done to determine if she has a brain tumor. When she gets to the doctor’s office, she is placed into a machine that generates x-rays. At the end of the scan, she is given a CD that has still images of her brain. Which type of brain imaging did Barbara receive?

Smell is to _______ as taste is to ______. 

The electrical signal that moves away from the cell body and down the axon 

Jane takes medication to treat her depression that blocks serotonin from reentering the neuron, allowing more serotonin to stay in the synapse. This is an example of what type of psychoactive drug? 

A pharmaceutical company wants to test the effectiveness of a new depression medication. To do so, they have participants randomly assigned to either receive the medication or a sugar pill. What are researchers trying control for in this experiment?

The _______ of light waves determines the intensity of color.

__________ messages are messages that are presented below the threshold of conscious awareness.