To illustrate operational definitions of psychological concepts, we contrast them with their dictionary definitions. Table 4.1 lists six psychological variables, their dictionary definitions and one or more operational definitions.
Of course there will be wide variations, butâ¦. According to my (very general) estimations listed above, on average each person may consume 66 gallons of water each day. Generally, in the United States there are about 2.5 people per household. So the water consumption figure jumps to 165 gallons per day.
What we find is that since January 1982, the average daily oil consumption for individual Americans living in the United States has averaged 2.56 gallons per person. More remarkably, we see that Americans have dramatically reduced their consumption of oil and its derivative products since July 2007.