Once they arrive at the laboratory, the treatment group participants are given a cup of coffee to drink, while control group participants are given water. For convenience, you assign all morning session participants to the treatment group and all evening session participants to the control group. You schedule an equal number of college-aged participants for morning and evening sessions at the laboratory. ![]() Research exampleYou want to test the hypothesis that drinking a cup of coffee improves memory. Without high internal validity, an experiment cannot demonstrate a causal link between two variables. Internal validity makes the conclusions of a causal relationship credible and trustworthy. Frequently asked questions about internal validity. ![]()
0 Comments
Leave a Reply. |