Study Four Results Section The group that played a chess game against the computer , the group who played against a friend , and the group who played against a stranger had significantly different self - confidence ratings overall , F ( 2 , 28 ) = 5 87 p = 01 Tukey's HSD tests showed that the computer condition had significantly lower self - confidence ratings than the other two conditions at pa OS and that the group that played against a stranger and the group that played against a best friend were not significantly different from each other Comparing the computer group with the other two groups yielded a = 1 31 a large effect . 1 . What kind of study design is this ( experimental or correlational ) 2 . If experimental what is the independent variable If experimental what is the dependent variable 4 . What kind of statistical test did the author run , and how do you know the used this test ? 5 . What do you think the mill and alternative hypotheses are in this study ? You might have to guess , but make it an educated guesses