The Examination

Summary

The Examination is a written examination composed of 200 multiple-choice, objective questions with a total testing time of four (4) hours. The current Examination Content Outline was implemented beginning with the 2014 Examinations reflecting the results of a 2013 practice analysis that will be in effect until June 30, 2019. A new Examination Content Outline reflecting the results of a 2018 practice analysis that surveyed diabetes educators about the tasks they performed will be in effect July 1, 2019.

Questions on the Examination are linked directly to a task or tasks. Each question, therefore, is designed to test if the candidate possesses the knowledge necessary to perform the task or has the ability to apply it to a job situation.

Exam Construction and Scoring

The National Certification Board for Diabetes Educators (NCBDE) develops the Certification Examination for Diabetes Educators (Examination) with the technical assistance of a testing agency. The two organizations work together to construct and validate the examination. NCBDE periodically conducts a survey of diabetes educators practice – often called a practice or job analysis. The study surveys Certified Diabetes Educators to determine the significance of specific tasks to a CDE’s practice. The practice analysis information is used to develop the examination content outline and to determine the percent distribution of the items for the role. Therefore, the subject matter and importance of each item on the examination reflects data validated by this periodic study.

NCBDE selects Certified Diabetes Educators who represent the multidisciplinary aspect of profession to serve on its Examination Committee. The Examination Committee drafts the examination’s multiple-choice items, which are then edited and validated by the testing agency, and approved by the Committee for inclusion on the examination. The Examination Committee and the testing agency review all the examination items for subject matter, validity, difficulty, relevance, bias, and importance for current practice. All items are evaluated, classified, and revised by the Examination Committee and the testing agency for conformance to psychometric principles. Each item is pretested prior to its use and must meet statistical parameters prior to being used as a scored item.

On the basis of a completed practice analysis, it is usually necessary to develop a new examination form to reflect the updated examination content outline and to review the minimum passing point/score. A Passing Point Study is conducted by a panel of experts in the field. The methodology used to set the minimum passing score is the Angoff method. NCBDE completed an analysis in 2018, with a new examination content outline to be implemented starting July 1, 2019. Upon implementation of the new examination content outline, a Passing Point Study will be conducted and questions evaluated by experts to determine how many correct answers will be necessary to demonstrate the knowledge and skills required to pass the examination, while keeping in mind the need to ensure that the passing score was consistent with the intended purpose of the examination.

Scores are reported as raw scores and scaled scores. A raw score is the number of correctly answered questions; a scaled score is statistically derived from the raw score. The total score determines whether candidate passes or fails; it is reported as a scaled score ranging between 0 and 99. The minimum scaled score needed to pass the examination has been set at 70 scaled score units.

The reason for reporting scaled scores is that different forms of the examination may vary in difficulty. Because new forms of the examination are introduced each year, a certain number of questions in each content area are replaced. These changes may cause one form of the examination to be slightly easier or harder than another form. To adjust for differences in difficulty, a procedure called “equating” is used. The goal of equating is to ensure fairness to all candidates. In the equating process, the minimum raw score (number of correctly answered questions) required to equal the scaled passing score of 70 is statistically adjusted (or equated). 

NOTE: Beginning July 1, 2019, implementation of an updated examination content outline goes into effect.  Therefore, prior to final scoring, all candidate scores and the passing point will be reviewed to ensure accuracy.  Because this information will not be finalized when the July testing begins, PSI will not be able to initially release examination scores or pass/fail status at the conclusion of the testing appointments. Every effort will be made to mail score reports as quickly as possible after sufficient data has been collected.

Pretest Questions

The examination questions are developed and reviewed for relevancy, consistency, accuracy, and appropriateness by individuals with expertise in diabetes education. Twenty-five of the 200 questions are new questions that have not been used on previous Examinations. Inclusion of these questions allows for collection of meaningful statistics about new questions, but are not used in the determination of individual Examination scores. These questions are not identified and are scattered throughout the Examination so that candidates will answer them with the same care as the questions that make up the scored portion of the Examination. This methodology assures candidates that their scores are the result of sound measurement practices and that scored questions are reflective of current practice.

For additional information about the examination, please refer to the current Handbook.
 

NEW Exam Suggestions & Tips Brochure

NCBDE has created a brochure that includes suggestions and tips to assist exam candidates in preparing for and taking the exam. Are you taking the exam soon? Check out the brochure for ideas that can be incorporated into your study plan and for information that might be helpful prior to/on your exam day.  

Test Center Experience

For some more information on the test center experience itself, you are encouraged to review a video available from PSI/AMP (NCBDE's testing agency). This short video provides an overview of computer-based testing procedures. NCBDE and PSI/AMP hope this video will increase your comfort level by outlining the process leading up to the administration and letting you know what to expect on your testing day.

 

TestCenterVideoImage

To access the video, please click the photo above.