Experimental Designs Read the following paragraph and answer the next three questions . A researcher decides to investigate the relationship between public speaking experience and self-confidence. She obtains subjects from a pool of volunteers and randomly assigns them to one of two conditions. In the first condition, subjects receive a one-week public speaking course consisting of two hours each day practicing various types of speeches, receiving critiques, and evaluating each other's work. In the second condition, subjects do not attend this class.
All subjects fill out a questionnaire at the end of the week.