A recent sociological experiment sought to determine the exact role that social support plays in the health of expectant mothers. To conduct the experiment, the researchers asked midwives to flip a coin each time they received a new client, and if it came up heads to try as hard as possible to put the client in contact with others who could provide social support. If the coin came up tails, the midwives would not discourage the woman from receiving social support, but would not facilitate it. What is the dependent variable in this experiment?
a. coin flips
b. health
c. social support
d. midwives
e. expectant mothers

____ 75. When Elton Mayo did his now-classic experiment on worker productivity, he found that he could increase productivity by changing variables in a work environment, but also that changing variables back increased productivity. What did he conclude was the true cause of the increase in productivity?
a. a decrease in sick days
b. his own bias
c. the effect of being studied
d. the effect of change in the workplace, as it broke workers’ routines and made them more alert
e. increased lighting and longer breaks