Professor Newberg decided to study living preferences of senior adults, so he visited a local retirement village and invited residents to participate in a lengthy survey. Professor Newberg's survey results are probably invalid because he did not use:
a. a valid hypothesis.
b. an operational definition.
c. independent and dependent variables.
d. random selection of participants.
Answer: d. random selection of participants.
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Suppose that five years from now, there is a blood test that assesses the likelihood of a person's committing suicide. It is likely that this test will measure the blood levels of ____
a. dexamethasone b. serotonin c. dopamine d. adrenalin
Which of the following areas plays a role in integrating sensory and hormonal information, as well as coordinating physiological responses involved in sexual behavior?
A. medial amygdala B. medial preoptic area C. ventromedial hypothalamus D. sexually dimorphic nucleus
Five-year-old Marco complains that his slice of cake is smaller than Maria's, his 10-year-old sister. But she explains, "Look, your slice is skinnier, but it's taller. So we really have the same amount"
Which aspect of concrete operational reasoning does Maria's explanation use? A) decentered thought B) seriation C) class inclusion D) dynamic transformation
The FIRST physical sign that a girl is reaching puberty _____.
A) the growth spurt B) pubic hair development C) breast development D) menarche