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Author Question: A researcher correlated achievement test scores in mathematics and science, but later learned that ... (Read 27 times)

joesmith1212

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on: Jun 20, 2018
A researcher correlated achievement test scores in mathematics and science, but later learned that the tests were too easy for the students. The outcome of the correlational analysis will be
 
  a. the same as if the researcher had used tests of appropriate difficulty.
  b. spuriously high because the easy exams will produce high scores and therefore high correlations.
  c. genuinely high.
  d. low because the easy tests will restrict the variation in scores on the two tests.

Question 2

What is the relationship between statistical conclusion validity and internal validity in experimental research?
 
  What will be an ideal response?


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guyanai

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Reply #1 on: Jun 20, 2018
Answer to Question 1

D

Answer to Question 2

Internal validity is concerned with the validity of the inferences about whether the effect of the independent variable on the dependent variable reflects a causal relationship; statistical conclusion validity is concerned with the validity of the inferences about the covariation between treatment and outcome. A study may be carefully designed and well controlled, but an error in the statistical analysis would lead to incorrect conclusions about statistical significance and effect size. Thus, internal validity depends to a great extent on statistical conclusion validity.


joesmith1212

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Reply #2 on: Jun 20, 2018
Thank you


guyanai

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Reply #3 on: Jun 20, 2018
No problem :)


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