1) Identify the independent and dependent variables (and the measurement scale for the dependent variables)

2) Indicate the levels of the independent variables and their attributes (between- or within-subjects; manipulated or subject; if manipulated, situational, task, or instructional)

The Study: In a study of crowding, introverts and extroverts are to be compared. Some are tested in a large room (8' x 8'), others are tested in a medium-sized room (6' x 6'), and others are tested in a small room (4' x 4'). To see if expectations will influence the outcome, half the participants in each group are told that the study hypothesizes that crowding will harm their performance; the remaining participants are told nothing about the hypothesis being studied. While in the room, participants fill out an anxiety survey (psychological test), then listen to a series of brief segments of five heavy metal songs and rank them from the most annoying to the least annoying.