Hypothesis, IV & DV

Listening to a radio broadcast of a sports event while studying for a test decreases performance on the test. 

Thinking positively when goal shooting improves accuracy in a match. 

Smoking cigarettes while driving a car increases driver alertness. 

People will behave differently in a crowd from the way they behave when alone. 

Reaction time to a visual stimulus is quicker than reaction time to a sound stimulus. 

Daydreaming occurs more often when a person is engaged in a simple task than when they are performing a complex task. 

Marijuana use impairs performance on a memory task.