Suppose an experiment is designed such that male undergraduate university student participant groups are split in half at random. One group plays a violent video game and another plays a neutral game....

Suppose an experiment is designed such that male undergraduate university student participant groups are split in half at random. One group plays a violent video game and another plays a neutral game. Immediately afterwards, the participants have someone “accidentally” bump into them. The experimenter is measuring whether or not the participants react aggressively to the person who bumped into them. Which of the following are true about this experiment?

a. It has high external validity because it uses a heterogeneous sample.

 b. The independent variable is how participants react and the dependent variable is which video game group they were assigned to.

 c. The dependent variable is how participants react and the independent variable is which video game group they were assigned to.

d. It meets the condition of “random assignment to condition” because each participant was equally likely to be assigned to the violent or non-violent video game condition.