A research finding that does not generalize to circumstances ...

[elizabeth18]

A research finding that does not generalize to circumstances different from those of the experiment is lacking
 
  a. internal validity.
  b. external validity.
  c. random assignment.
  d. statistical significance.

Question 2

Random assignment is important to an experiment to ensure that
 
  a. any differences found between the groups are caused by the independent variable.
  b. any differences found between the groups are caused by the dependent variable.
  c. the subjects in a study are a good representation of the larger population.
  d. experimenter bias does not contaminate the results.

[eliasc0401]

Answer to Question 1

Answer: b.

Answer to Question 2

Answer: a.