Mehmet is conducting a study aimed at improving the problem ...

[tichca]

Mehmet is conducting a study aimed at improving the problem solving abilities of older adults. Prior to the intervention, all of the participants are given a series of problems to solve and, in the process of trying to solve them, many of the participants refine their approaches to problem solving. As a result, Mehmet's study has a(n) ____ threat.
 
  a. history
 b. maturation
 c. instrumentation
  d. testing

Question 2

In Pavlovian conditioning, a light or tune is a/n _________ when first introduced.
 
  a. conditioned stimulus
  b. unconditioned stimulus
  c. neutral stimulus
  d. conditioned response

[anoriega3]

Answer to Question 1

d

Answer to Question 2

C

[tichca]

Wow, this really help

[mochi09]

Thanks for the timely response, appreciate it