When an experimenter can confidently state that the findings from an experiment are due to the independent variable and not due to other, uncontrolled factors, the research is considered
a) testable.
b) statistically significant.
c) double-blind.
d) internally valid.
d
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A college freshman is about to give her first speech in class. As she walks to the podium, she feels her heart pounding much faster and harder than normal. After the speech, she notices that her heart begins to return to a normal pace because:
A. her peers congratulate her on a job well done B. walking settles her heart C. the parasympathetic division calms her heart D. the heart cannot maintain a fast, hard rate for very long
Some of the long-term effects of prenatal exposure to tobacco products include
a. a tendency to smoke in adulthood. b. an increased risk of conduct and other behavior problems. c. toxoplasmosis. d. depression.
Natural concepts ____.?
a. ?have fuzzy boundaries b. ?are usually learned formally c. ?usually use rigid rules to define their elements d. ?are typically universally held by all people
Marcus, an 18-month-old, lives in a two-parent family. He is securely attached to his mother. According to research, what type of attachment is he likely to have with his father?
A) insecure-avoidant B) secure C) insecure-resistant D) There is not enough research on father-infant attachment to know Marcus's attachment.