The mean is ____
a. ?the difference between the highest and lowest scores
b. ?the arithmetic average
c. ?one-half of the range
d. ?the most frequent score
ANSWER:
b
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What did Piaget propose occurs when a stimulus or event is acted upon, perceived, and understood in accordance with existing patterns of thought?
A. assimilation B. cognitive suspension C. accommodation D. learning
Around age 11, African American children begin to show slightly higher self-esteem than Caucasian American children.
Answer the following statement true (T) or false (F)
According to Vygotsky, what is required for cognitive development?
a. Intellect inherited genetically b. Social interaction c. Age-appropriate problem solving d. Stimulating toys that require problem solving
An instructor randomly assigns two sections of his course to an experimental condition (new teaching method) or control condition (regular teaching method). Students in the 9:30 section receive the experimental treatment and students in the 1:30 section participate in the control condition. At the end of the semester the instructor's tests reveal that students in the 9:30 section had significantly higher test scores than students in the 1:30 section. Based on this summary, we can state that
A. the results are uninterpretable because of intact groups. B. the findings have external validity across two times of day. C. the experiment has internal validity. D. all of these