Assessment Development
Assessments are high-stakes instruments. Whether used for professional certification, academic credentialing, or employment selection, they must measure the right things accurately, fairly, and consistently.
Prism Data applies the full toolkit of psychometric science to develop assessments that meet the most demanding standards of measurement quality. Our assessment development practice draws on both Classical Test Theory and modern Item Response Theory to build tests that are reliable, valid, and legally defensible.
Our Capabilities
We work with clients across certification, education, and employment contexts, tailoring our approach to the specific measurement purpose and population. Our assessment development capabilities include:
Item Writing & Review
Develop test items that are technically accurate, clearly worded, and appropriately targeted to the relevant knowledge or skill domain. Items undergo systematic editorial and sensitivity review before field testing.
Cut Score Setting
Facilitate defensible standard-setting studies using established methods including Angoff, Modified Angoff, Bookmark, and other procedures appropriate to the assessment purpose. Results are documented to withstand legal and regulatory scrutiny.
Classical Test Theory Analysis
Compute item difficulty, item discrimination, point-biserial correlations, and distractor analysis statistics to evaluate item quality and inform test assembly decisions.
Item Response Theory Modeling
Apply one, two, and three-parameter logistic models as well as polytomous IRT models to calibrate items, estimate person ability, and support adaptive testing applications.
Test Form Equating
When multiple test forms must be interchangeable, we apply equipercentile, IRT-based, and other equating methods to ensure that scores from different forms are on the same scale.
Differential Item Functioning Analysis
Evaluate whether items perform differently for subgroups defined by gender, ethnicity, or other characteristics, identifying and resolving sources of measurement bias.
Test Blueprint Development
Help clients define the content domain, establish the proportional representation of content areas, and create the specification framework that guides test assembly.
Standard Setting Studies
Design and facilitate structured meetings in which subject-matter experts recommend the minimum level of competence required to pass an assessment, producing documented and defensible passing scores.
Business Outcomes
Rigorous assessment development produces tools that serve their intended purpose with precision. The business impact of this service includes:
Protection from Legal Challenge
Assessments developed with documented validity evidence, fairness analysis, and defensible cut scores are substantially more resistant to legal challenge under employment law and professional testing standards.
Improved Credential Value
Certification programs that rest on psychometrically sound assessments earn greater respect from employers, regulators, and the public, enhancing the market value of the credential.
Better Educational Outcomes
Schools and training programs that use well-calibrated assessments receive more accurate signals about student learning, enabling more targeted instructional interventions.
More Accurate Selection Decisions
Employment tests with demonstrated predictive validity improve the accuracy of hiring decisions, increasing the proportion of new hires who succeed in the role.
Scalable Testing Programs
IRT-calibrated item banks and equated test forms support the development of large-scale testing programs that can accommodate high volumes of candidates across multiple administration windows without compromising score comparability.
Common Use Cases
Certification & Licensure
Develop defensible, legally sound assessments for professional certification and licensure programs with rigorous psychometric standards.
Educational Assessment
Create reliable educational tests with properly calibrated items, appropriate difficulty levels, and valid score interpretations.
Employment Testing
Build selection assessments that are both predictive of job performance and compliant with employment law and professional guidelines.
Ready to build better assessments?
Our psychometric experts help you develop, validate, and maintain assessments that meet the highest standards of measurement quality.
Contact Us Today