A student proposes to randomly assign residents of a fraternity ...

[cool]

A student proposes to randomly assign residents of a fraternity house to either receive a brief intervention to reduce risky alcohol use or to not have an intervention. The findings indicated similar changes in both groups.
 
  The student should be concerned with
   a) diffusion of treatment
 b) history.
 c) random selection.
 d) statistical regression.

Question 2

At a New Year's celebration, the first firecracker to explode causes everybody to startle and turn toward the location of the explosion. Later on, after many such explosions, no one seems to react when a firecracker explodes.
 
  This is an instance of which of the following?
   a) Habituation of the orienting respons
 b) Extinction of the orienting response
 c) Priming of the vigilance response
 d) Decay of the vigilance response

[lou]

Answer to Question 1

A

Answer to Question 2

A