For vocational outcomes, IQ test scores correlate most clearly with
a. occupational prestige.
b. income level.
c. the hours of overtime worked.
d. whether the worker is self-employed or hired by others.
A
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Dr. Wilkins randomly assigns subjects to one of two groups. He is interested in the effects of caffeine on anxiety levels. He gives subjects in the first group an extra two cups of coffee a day for six months
The second group receives an extra two cups of decaffeinated coffee a day for the same time period. Importantly, subjects do not know whether they are being given regular or decaffeinated coffee. By providing one group with decaffeinated coffee, Dr. Wilkins is trying to account for which potential element of the experiment? A) participant fraud B) inter-rater reliability C) the placebo effect D) variability
After taking your best friend to the airport, you stay to watch the plane take off. As you watch it go, the image of the plane on your retinas becomes smaller and smaller
Why is it that you perceive the airplane as flying away from you instead of shrinking? Briefly explain how this works. What will be an ideal response?