An experiment was performed to test whether caffeine in Coca-Cola would improve performance on an intelligence test. One randomly chosen group of subjects was given an 8 oz. cup of Coca-Cola containing caffeine to drink 10 minutes before taking the intelligence test. Another randomly chosen group was given an 8 oz. cup of decaffeinated Coke to drink 10 minutes before taking the test. Neither group had any food or drink for three hours before the experiment began. What are the levels or conditions of the independent variable?
a. 8 oz. of Coca-Cola
b. Caffeinated and decaffeinated Coca-Cola
c. Scores on the intelligence test
d. 10 minutes and 10 minutes
Ans: B
You might also like to view...
The defense attorney asks Twila, a prospective juror, if she knows the prosecuting attorney. This illustrates what process?
a. voir dire b. normative influence c. informational influence d. jury nullification
A student conducted a research project in which fake smoke entered the waiting area used by participants. This procedure was used to create a stressful situation and the student then tested participants' performance on complex reasoning tasks. One student waiting in a wheelchair experienced a panic attack when the smoke appeared. After this incident, the IRB stopped the research. This example demonstrates that
A. IRBs can be unreasonable. B. characteristics of individuals must be considered when determining risk. C. the deception was described fully during the informed consent procedure. D. this research should have been conducted online
The all-or-none law states that ____
a. a neuron produces an action potential of maximal strength, or none at all b. all neurons fire or none at all c. all neurons in a pathway fire at the same time, or none do d. all ions move in the same direction, or none do
Emotion and motivation are functionally connected in that:
A) people are motivated to act because of their emotions. B) highly motivated people tend to express little emotion. C) being motivated causes one to experience emotion. D) emotion inhibits motivated action.