Regarding the motor skills of babies, which of the following statements is TRUE?
a. Motor skills simply emerge at the appropriate developmental ages.
b. Behaviors in infants are sudden and dramatic; one day, they are sitting without support, and the next day they are standing holding on to the furniture.
c. Babies tend to tune their motor skills over time, making their movements smoother and more effective.
d. Maturation is the only factor behind developing motor skills.
ANSWER: c
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Which of the following research topics on problem solving would have the lowest ecological validity?
a. How people plan their route through a hardware store, so that they can locate the items as quickly as possible. b. How diners in a restaurant figure out how to divide a bill fairly among themselves. c. How parents of preschoolers plan a birthday party. d. How students in a geometry class use information from previous problems to solve the current problem.
"Children who watch violent cartoons will become more aggressive." According to the scientific method, this statement is most likely a(n)
A) theory. B) untestable statement. C) hypothesis. D) fact.