P.W. Herman wants to know whether consumption of alcoholic beverages affects peoples' bicycling abilities. He suggeststhat the alcohol itself doesnt have any negative effects, but that people who drink alcohol expect to have their riding abilities impaired so they act drunk. To control for the participants' expectations, P.W. gives half of his sample vodka and the other half of his sample vodka-flavored water. P.W. is using a(n)____research method, and the vodka-flavored water is a ____.
a. naturalistic observation; confounding variable
b. survey; confounding variable
c. experimental; placebo
d. experimental; treatment variable
Question 2
An experimenter who conducts a study under highly controlled conditions often reduces the ____.
a. scientific value of the results
b. extent to which conclusions drawn from the results can be applied to other populations or situations
c. likelihood that the research hypothesis will be confirmed by the results
d. strength of the relationship between the independent and dependent variables
Typical Caffeine Content of Chocolate and Several Beverages
Standard Alcoholic Drink Sizes
Alcoholic fermentation Chemical Equation
Industrialized nations consumption
Foods and beverages that contain aspartame must carry a warning label
The Type of Blood Vessel Injury Often Affects the Nature of the Hemorrhage