Intracranial self-stimulation is a very powerful reinforcer because it activates the same pleasure pathways in the brain that are activated by natural __________ reinforcers
a. primary
b. secondary
c. conditioned
d. unconditioned
A
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What research advantage is present when studying behavioral differences in monozygotic twins?
Since the twins have different genotypes at birth, behavioral differences can more likely be attributed to nature rather than nurture. Since the twins maintain identical genotypes throughout their lifetimes, behavioral differences are 100 percent attributable to differences in their environments. Since the twins have identical genotypes at birth, behavioral differences can more likely be attributed to differences in their environments. Since the twins are born with identical phenotypes, behavioral differences will also be identical.
One of the first scientists to suggest that infants actively construct their own knowledge was
A) Jackie Gibson. B) Mary Whiton Calkins. C) Arnold Gesell. D) Jean Piaget.
A statistically significant difference means that _____
a. the population mean is larger than the hypothesized sample value b. H0 was rejected and H1 accepted c. H0 was not rejected and H1 was not accepted d. the alpha level was lower than expected by chance alone Information; p 167, K, 2
Alice, a 16-year-old, gave birth to a baby boy last year. How will this affect the likelihood that her 13-year-old sister, Marie, will have a baby?
A. It will increase. B. It will be unaffected. C. It will decrease. D. It will increase only if Marie is already sexually active.