The correlation between ice-cream sales and homicide rates has been used as an example of how correlation does not imply causation. What is one reason why we should be hesitant to conclude that ice cream is somehow related to murder?
A. We need to design an experiment to test the relationship.
B. A confounding variable likely exists that could explain the relationship.
C. We need a larger sample size to prove causality.
D. This study did not use random sampling to recruit participants.
Answer: B
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Which of the following is true of the resting membrane potential?
A. It is a function of positively charged ions concentrated inside the cell. B. It is positive inside with respect to outside. C. It is the result of a freely permeable membrane. D. It is the difference in electrical charge inside and outside the inactive neuron.
Which of the following parenting behaviors is linked to aggression from early childhood through adolescence in diverse cultures?
A) reinforcement of prosocial modeling B) inductive discipline C) consistent discipline D) power assertion
Many people with depression smoke because:
a. It is a social event that makes them feel better b. Ingredients in tobacco act as monoamine oxidase inhibitors c. Nicotine increases their serotonin levels d. Addiction to nicotine is unlikely to occur in depressed smokers
A professor wants to examine the effectiveness of a new teaching approach. Her 9:00 a.m. class will be exposed to the new method of viewing teaching tapes while her 10:00 a.m. class will be exposed to traditional lectures
She will assess the students' progress after six sessions. What method is the professor using to conduct her experiment? a) intuitive b) biological c) environmental d) scientific