How do scientists portray the knowledge that is obtained through careful observation?
A. Scientists treat this information as certain truths.
B. Scientists treat this information as proof of ideas.
C. Scientists treat this information as final answers to a question.
D. Scientists treat this information as one step in a process of understanding a problem.
Answer: D
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Which item is a primary reinforcer?
a. ?money b. ?sex c. ?grades d. ?tokens
A drug will prevent an action potential if it ____.
A. lowers the threshold of the membrane B. blocks the movement of potassium across the membrane C. blocks the movement of sodium across the membrane D. increases the movement of sodium across the membrane
A teacher is disappointed to find that most of her students' test scores are clustered together at the low end of the grading scale, with only a few students having high grades. If she was to graph the distribution, what shape would it have?
A) normal B) positively skewed C) negatively skewed D) central
A growing body of research suggests that the code-based approach to reading instruction is superior to whole-language approaches
Indicate whether the statement is true or false.