In order to help separate the effects of your independent variable from the effects of chance or other random variables, you need to have _____.
A. a representative sample.
B. 100% control over all variables.
C. an experimental group.
D. a control group.
Answer: D. a control group.
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People with parkinson's:
A. have abnormally high levels of dopamine B. usually begin experiencing symptoms in their 20s C. have trouble with mirror reading tasks D. can be treated with deep brain stimulation
Which of the following contraceptives may NOT be effective for women more than 30% heavier than their medically ideal weight?
A) ?Seasonale B) ?Ortho Evra C) ?Implanon D) ?NuvaRing
Richard believes that he is an alien from the planet Mars and that he has come to Earth to destroy every source of energy. Which of the following symptoms of schizophrenia does Richard show?
A. Catatonia B. Hallucination C. Emotional flatness D. Delusion
Which of the following is a risk factor for trauma survivors developing PTSD?
a. lack of social support
b. excessive control over one's actions and thoughts
c. above-average cognitive skills
d. low scores on neuroticism