Which statement best describes Kaufman's (2001) findings on the pattern of IQ change from young adulthood though old age generated by cross-sectional studies?
a. IQ scores peak in young adulthood (age 20-30) and decline steadily through middle age (40-50) and old age (80-90).
b. IQ scores rise gradually until middle age (age 40-50) then decline slowly until old age (around 80) when the decline accelerates.
c. IQ scores remain fairly constant across the lifespan.
d. IQ scores increase gradually between young adulthood (age 20-30) and old age (80-90).
b
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The genetic influences that determine behavior may never be fully understood due to __________.
A. the ease of research to differentiate between the effects of the environment and the effects of genes B. the likelihood that most behaviors are determined by the interaction of many genes and the environment C. the tendency to rely on twin studies in genetic research D. our significant understanding of how genes impact brain chemistry
Children age 7 to 9 generally expect friends to be available, have nice toys and ___________
Fill in the blank with correct word.
Hull's primary research focus was grounded in ____.?
a. ?Pavlov's laws of conditioning b. ?respondent behavior c. ?Watson's behaviorism d. ?Estes's stimulus-sampling hypothesis e. ?None of the choices are correct.
The potential difference at which a neuron will fire an action potential is called the ____
a. ?excitatory potential b. ?least noticeable difference c. ?potentiation trigger d. ?threshold of excitation