What characteristic of the sample variance do researchers generally consider more important: unbiased estimator or minimum variance?
A. minimum variance
B. unbiased estimator
C. Neither one; they are equally important.
Ans: B
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Children who are overscheduled could actually be at a disadvantage because they lack the free, unstructured time to engage in play activities that foster creativity and innovation.
Answer the following statement true (T) or false (F)
Which of the following is not a form of formal reconnaissance?
A. debriefing B. explanation C. description D. self-reflection
A test item would be considered biased when
a. the item is significantly more difficult for one group when the overall level of performance on the test is held constant. b. the item is not measuring the same factor or dimension of aptitude or personality than other items in the group. c. the item is identified is significantly more difficulty for one group than another. d. all of the above.
Children can begin to think logically once they reach Piaget's stage of
A. concrete operations. B. formal operations. C. postformal operations. D. preoperational operations.