Independent Variables (IV), Study Environment, Sleep Duration, Type of Excercise, Type of instruction, Method of studying, Snack type, Homework schedule, Dependent Variables (DV), Test Scores, Number of words correctly recalled, Mood rating, Concentration level, Class participation, Quality of sleep, Problem solving ability, Extraneous Variables (EV), Time of Day, Noise level, Temperature, Lighting conditions, Previous experience, Experimenter bias, Participant fatigue, Recent meals, Mood, Instruction clarity

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