Let’s suppose that the same experiment’s (as in Question 6) procedures were repeated using a wider range of participants who vary in age, gender, occupation, and ethnicity. What is this process called...

Let’s suppose that the same experiment’s (as in Question 6) procedures were repeated using a wider range of participants who vary in age, gender, occupation, and ethnicity. What is this process called and what is its purpose?

a. Random assignment to condition; increase generalizability

 b. A meta-analysis; to increase internal validity

 c. Replication; to increase external validity

d. Replication; to increase internal validity