According to the Young-Helmholtz theory, what is the basis for color vision?
A. A different receptor for each color
B. Three kinds of cones
C. A single receptor that produces different responses for each color
D. The combined influences of rods and cones
Answer: B
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Home visits to economically disadvantaged families increased maternal involvement with infants and secure attachment. The home visitors helped mothers
a. stop planning ahead for their fetuses. b. accurately interpret infant cues. c. encourage their children to play alone to avoid dependence. d. know how to promote good nutrition and eating habits.
People with major neurocognitive disorder generally suffer from agnosia, which is defined as the inability to a. use language
b. understand language. c. recognize and name objects. d. remember events and places.
Multiple sclerosis is more common in northern latitudes and
A. affects more women than men. B. affects more men than women, as it is a sex-linked condition. C. affects equal numbers of men and women. D. typically does not develop until after the age of 55 years.
Suppose you randomly select 40 participants, measure the length of each one's index finger, and also administer an IQ test to each. The dependent variable in this study is
a. the length of the index finger. b. the IQ scores. c. the 40 participants. d. nonexistent—there is no dependent variable; this is a correlational study.