About what percent of traffic fatalities in the U.S. are related to alcohol?
a) 10 percent
b) 25 percent
c) 40 percent
d) 75 percent
C
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Infants typically begin to make vowel-like sounds at around the age of __________.
A. six to seven weeks B. two to three months C. six to seven months D. nine to twelve months
For an independent-measures t statistic, you typically must compute the pooled variance before calculating the estimated standard error
Indicate whether the statement is true or false
If a psychologist discovers that the blood of patients with schizophrenia contains a certain chemical not found in the general population, we can conclude that a. this chemical causes a person to develop schizophrenia. b. having schizophrenia causes this chemical to form in a person's blood. c. both schizophrenia and the chemical are caused by some unknown third factor, such asthe typical
diet in mental hospitals. d. the chemical and schizophrenia are related, but no causal relationship has been established.
The theories of Lev Vygotsky emphasized the role played by _____ in cognitive development.
A) genetic predisposition B) mental representation C) social interaction D) concrete objects