Two sources of visual information which might be used to guide human locomotion are optic flow and perceived visual direction. The evidence suggests that:
a. Optic flow is always used
b. Visual direction is always used
c. Both are used, but their relative importance depends on circumstances
d. Neither is used
c. Both are used, but their relative importance depends on circumstances
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The research method of studying infant temperament by interviewing the parents is . . .
b. The only valid method for evaluating infant temperament c. Flawed because it fails to include input from the infants about their parents d. The only possible method, flawed or not, because infants’ speech is unreliable
A zygote is formed when a sperm enters an ovum
Indicate whether this statement is true or false.
In Clara's honors research project on the effect of video games on aggression in children, the measure of aggression was the number of times physical contact occurred among the children being observed. Clara's measure of aggression is an example of
a. the operational definition of a variable. c. the reliability of a measure. b. the validity of a measure. d. a control variable.
If the primary problem is that the woman cannot ovulate properly, the most common fertility treatment is _______________
a. chorionic villus treatment b. artificial insemination c. fertility drugs d. in vitro fertilization