1.   A fourth group will receive a placebo and standard medical care.

2.   A small group would receive intensive training, and then would train others.

3.   Another group received partial information about the events described in the passage.

4.   For example, instead of receiving vitamin C as the experimental group is doing, the control group receives a placebo.

5.   The group receives lots of fan mail.

6.   Two groups of rats received initial training in which presentations of each of three auditory stimuli occurred.

7.   The healthy control group received no additional treatment.