You want to conduct a study to determine which is a more pow…

You want to conduct a study to determine which is a more powerful motivator for eating: food that smells good or food that looks good. Participants in group A are presented with good smelling food while participants in group B are presented with food that looks delicious. You measure how much the participants say they are craving the food. What is the dependent variable?

A researcher is interested in whether people are more likely…

A researcher is interested in whether people are more likely or less likely to help someone in distress when others are present. Some subjects were tested when they alone were witness to someone in distress, while others were tested when many people were present. The researcher discovered that witnesses were much more likely to help when they alone witnessed the person in distress. What research method was used?