To study the effectiveness of a new anti-anxiety drug, researchers randomly assign equally anxious people to two groups, one getting Drug X and the other getting no drug. The researchers mistakenly conclude that Drug X works because people in the drug group show fewer signs of anxiety than the others. What is the mistake?
a. They never introduced an independent variable.
b. They did not create a placebo control group.
c. They never did a pretest of anxiety symptoms.
d. They did not operationally define what the experimental group was.
B
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One of the ways that humans are different from other species is that our sensory organs are ____
a. focused more on resolution than on detection b. focused more on detection than on resolution c. focused more on visual stimuli than auditory stimuli d. focused more on visual stimuli than tactile stimuli
While hiking with a friend in the Sierra Nevada mountains in California, Lenny comes face-to-face with a young bear on the trail. Lenny rapidly enters the first stage of Selye’s General Adaptation Syndrome. His brainstem initiates the release of the neurotransmitter norepinephrine, which increases his vigilance and fear. This is part of his ____
a. ?cognitive response b. ?behavioral response c. ?emotional response d. ?physical response