Answer Happy

There is a strong correlation between the divorce rate in Illinois and the per capita consumption of chocolate, despite no plausible explanation as to why either variable should affect the other. Correlational studies are limited in their ability to show because (select all that apply) Directionality; correlations cannot tell you if the change in one variable is causing the change in the other variable Causality; correlations cannot tell you if the change in one variable is causing the change in the other variable Causality; researchers cannot tell if the divorce rate is affecting the consumption of chocolate, or if the consumption of chocolate is affecting the divorce rate Directionality; researchers cannot tell if the divorce rate is affecting the consumption of chocolate, or if the consumption of chocolate is affecting the divorce rate
Trent has developed a new line of SuperPowerMax protein shakes that he believes will lead people to increase their muscle mass faster than they drink regular protein shakes and decides to test his hypothesis using an experiment. He gives half his participants SuperPowerMax protein shakes and half traditional protein shakes and tells them he will measure their muscle mass in a month. He tells the participants receiving the SuperPowerMax protein shakes that their shakes are better for building muscle than other protein shakes and that they will definitely see results. A month later, he is happy to see that his SuperPowerMax group increased their muscle mass significantly more than the traditional protein shake group. What did Trent fail to consider? Placebo effect, because participants in the SuperPowerMax condition may have changed other behaviors because they believed that they were using a superior protein shake Hawthorne effect, because participants in the SuperPowerMax condition changed their behaviors because they knew Trent would weigh them a month later Nothing, believing that SuperPowerMax would increase their muscle mass would not affect the behaviors of the experimental group or the results