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2. Discuss the differences between the following four scales of measurement: nominal, ordinal, interval and ratio scales. Where is it appropriate to use these different scales and where is it inappropriate? What scales are appropriate for measuring the following: (a) height, (b) mood, (c) facial attractiveness?
3. How would you design a study to investigate the relationship between alcohol and reaction time? What alternative study designs would be available to you, and what would be their relative strengths and weaknesses?