ENIVRONMENTAL CONDITIONS: each classroom condition would be different as each experiment was held on different days, under different environmental conditions. The weather, surrounding noise, time of the day and temperature would all affect the arousal state of participants. For example, rain could be relaxing, allowing some participants to feel more relaxed than others. The noise level of surrounding classes could affect the ability to hear the music, and the temperature of the room could also affect the participant's ability to remain still and calm. The time of the day could determine the participant's mood, if they're tired or stressed, calm or ready for the day.