If you cannot give your participants a pre-test before assigning ...

[Mollykgkg]

If you cannot give your participants a pre-test before assigning them to conditions
 
  a. It is impossible to randomly assign them to conditions
  b. Your experiment will not be reliable
  c. You cannot assign them to conditions using matching
  d. Your experiment will not be valid

Question 2

Matching can reduce the precision of your experiment if
 
  a. the variable on which you match is not highly correlated with the dependent variable
  b. the variable on which you match is too highly correlated with the dependent variable
  c. the matching variable and the dependent variable are the same
  d. None of these are true. Matching always increases the precision of an experiment.

[manuelcastillo]

Answer to Question 1

c

Answer to Question 2

a

[Mollykgkg]

Excellent

[Dominic]

Gracias!