DRC DRC Psychometrics and Research 2

Question 1

What does 'vertical scaling' enable in DRC's multi-grade assessment program?

Accepted Answer

Placing scores from different grade levels on a common scale to measure growth across grades

Answer

Vertical scaling creates a common score scale that spans multiple grade levels, enabling growth to be measured by tracking a student's score along the scale across years.

Question 2

What is a 'concordance study' in the context of DRC assessment research?

Accepted Answer

Research establishing statistical relationships between scores on two different assessments

Answer

A concordance study develops statistical crosswalk tables showing the relationship between scores on two different tests, helping users interpret and compare results across assessments.

Question 3

What does 'model fit' indicate when DRC applies IRT to test data?

Accepted Answer

How well the chosen statistical model explains the actual pattern of student responses

Answer

Model fit statistics evaluate whether the IRT model adequately describes the observed response data, with poor fit suggesting that model assumptions may not hold for certain items.

Question 4

What is 'test fairness' research as conducted by DRC psychometricians?

Accepted Answer

Systematic investigation confirming that the assessment does not systematically disadvantage any student subgroup

Answer

Test fairness research examines whether assessment processes, items, and scores produce comparable validity and reliability across diverse student subgroups.

Question 5

What is the purpose of 'linking studies' in DRC's multi-year assessment program?

Accepted Answer

Statistically connecting score scales across years so scores remain comparable over time

Answer

Linking studies establish statistical relationships between test forms administered in different years, ensuring that a score of 250 this year means the same thing as a score of 250 last year.

DRC - Data Recognition Corp. Practice Test

DRC - Data Recognition Corp. Practice Test

DRC DRC Psychometrics and Research 2