In one California study, drivers who had just passed an on-road driving test were randomly assigned to either receive a 17-minute hazard perception training or to receive no additional training. Over the course of the following year, male drivers who received the training had a rate that was nearly 25% lower than the group of untrained males. However, there was no such drop in accident for female drivers who had received the training."

b) Is the finding above from a correlational or experimental study? How can you tell? What are the two main variables in the result?