Ahmad has a specific phobia about elevators. His therapist teaches him how to relax and then has him relax when he is in a building with elevators. Next, he practices being relaxed when pushing an elevator button and finally, when taking an elevator ride. What kind of therapy is Ahmad experiencing?

Lev has just finished collecting data for his master's thesis. He now wishes to calculate a

statistic to determine statistical significance. What is the first step Lev should take? a. Operationally define his variables b. Calculate the mean scores for participants in each of his groups c. Determine which of his participants responded the way they did due to chance factors d. Calculate the range, variance, and standard deviation for scores from each of his groups e. State his hypothesis about the nature of the relationships between variables

The tiny gaps in the myelin where the axon is exposed are called the nodes of __________

a) Ranvier. b) Synapse. c) Vesicle. d) Miron.