One way to prevent experimenter bias is to be sure that the experimenter and the participants know nothing about who is receiving the experimental treatment and who is not. This is known as ____.
a. experimenter design
b. the placebo effect
c. a random assignment of variables
d. a double-blind design
Question 2
In an experiment, Dr. Fatka watches forty participants play basketball and gives each participant a rating from 1 to 10 to assess the participant's basketball ability. Dr. Fatka randomly divides the forty participants into two groups and personally teaches one group how to play basketball and the other group how to play football. Finally, Dr. Fatka watches all forty participants play basketball again and gives each participant a new rating. After looking at the data, Dr. Fatka concludes that teaching basketball is more effective than teaching football in raising the basketball ratings. This experiment is flawed because of ____.
a. experimenter bias
b. random sampling
c. double-blind design
d. correlations
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