15.38 Romantic music, behavior, chi square, and effect size: Guguen et al., (2010) investigated whether exposure to

15.38 Romantic music, behavior, chi square, and effect size: Guéguen et al., (2010) investigated whether exposure to romantic music affects dating behavior. The participants, young, single, heterosexual French women, waited for the experiment to start in a room in which songs with either romantic lyrics or neutral lyrics were playing. After a few minutes, each woman who participated completed a marketing survey administered by a young male confederate. During a break, the confederate asked the participant for her phone number. Of the women who listened to romantic music, 52.2% (23 out of 44) gave him her phone number, whereas 27.9% (12 out of 43) of the women who listened to neutral music did so. The researchers conducted a chi-square test for independence, and found the following results: (χ 2(1, N = 83) = 5.37, p < 0.02).

a. Calculate Cramér’s V. What size effect is this?

b. Calculate the relative likelihood of providing her phone number for women listening to romantic music versus neutral music. Explain what we learn from this relative likelihood.