Psychometrics Quiz
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Questions and Answers

Which of the following best defines a point-estimate in psychometrics?

  • A range of values likely to contain the true score
  • The amount of error around a score estimate
  • The score obtained from a test (correct)
  • A measure of the variability of test scores

What does a confidence interval reflect?

  • A range of values likely to contain the true score (correct)
  • A point-estimate
  • A measure of the variability of test scores
  • The amount of error around a score estimate

What can be calculated using the standard error of measurement?

  • The amount of error around a score estimate
  • The variability of test scores
  • The standard deviation of test scores
  • The range of values likely to contain the true score (correct)

Which of the following best describes the standard error of measurement?

<p>It reflects the amount of error around a point estimate in standard deviation form (B)</p> Signup and view all the answers

Which formula is used to calculate the standard error of measurement?

<p>se_m = SO * sqrt(1-RXX) (D)</p> Signup and view all the answers

What confidence interval should be used for university exams

<p>75% (D)</p> Signup and view all the answers

Which type of correlation is not compromised by measurement error?

<p>True score correlation (D)</p> Signup and view all the answers

What is the maximum correlation between two sets of scores based on observed score correlation?

<p>1.0 (A)</p> Signup and view all the answers

Which type of correlation is compromised by measurement error?

<p>Observed score correlation (D)</p> Signup and view all the answers

How can you estimate the true score correlation?

<p>By knowing the reliabilities associated with the scores (D)</p> Signup and view all the answers

What is the formula used to estimate the theoretical correlation between two variables based on their respective reliabilities?

<p>rmax (B)</p> Signup and view all the answers

What does the correction for attenuation formula represent?

<p>The ratio of the observed correlation to the square root of the product of the reliabilities (C)</p> Signup and view all the answers

What is the maximum possible correlation between two variables based on their respective reliabilities?

<p>r_max=√(R_xx R_yy) (C)</p> Signup and view all the answers

What is the minimum correlation value required for exploratory research according to Nunnally's correction for attenuation formula?

<p>.70 or higher (C)</p> Signup and view all the answers

What is the minimum correlation value required for basic research according to Nunnally's correction for attenuation formula?

<p>.80 or higher (A)</p> Signup and view all the answers

What is the minimum correlation value required for applied cases according to Nunnally's correction for attenuation formula?

<p>.90 or even .95 or higher (D)</p> Signup and view all the answers

Which of the following should be true before applying the correction for attenuation formula?

<p>The correlation should be statistically significant (D)</p> Signup and view all the answers

What is the purpose of the correction for attenuation formula?

<p>To estimate the true correlation between two variables (A)</p> Signup and view all the answers

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