Table 2.

Assessment center features by release

Release 1: November 2007

Create a study

Add existing PROMIS instruments (short forms, CAT) to a study

View item- and instrument-level statistics (IRT parameters, means, scale scores, model fit, reliability indices)

Set-up simple study (single time point, single arm)

Upload and administer consent forms

Create study-specific Websites for data collection

Monitor accrual

Export interim and end-of-study data

Release 2: April 2008

Create custom items and instruments

Track item changes through automated item history documentation

Review item history

Set-up complex study (multiple time points, multiple arms)

Cluster items or instruments

Randomize item and instrument presentation

Establish branching logic within instruments

Enable researcher-based data entry

Select and customize registration fields

Release 2.1 and 2.2: May 2008

Improved stability and usefulness of software

Added additional code to permit easy integration testing allowing developers to add a feature and automatically test that all previously entered features remained functional

Standardized source code

Removed redundant code

Server improvements

Release 3: December 2008

Review newly created custom CATs to ensure their development adheres to basic theoretical principles of CAT and IRT

Select first CAT item to be based on theta or item content

Conduct a CAT demonstration and receive a real-time summary report

Use administration engine that reduces administration of identical items shared by multiple instruments

Select format for how items are presented to participants

Enable researcher-based registration

Export accrual report for NIH progress reports

Export data oriented in horizontal rather than vertical layout

Update certain study set-up parameters

Release 4: May 2009

Addition of PROMIS profile measures

PROMIS Profile and CAT reports with norms and graphical display

Enhanced usability features (e.g., preview functionality, item and instrument ordering)

Enable CATs with collapsed item categories and zero-based scoring

Improve system security and reliability

Release 4.1: August 2009

Improved stability and usefulness of software

Release 4.5: September 2009

Assessment Center Offline

Assessment Center Offline User Manual

Release 4.6: December 2009

Improved stability and usefulness of software

Modifications Scheduled For Future Release

Online monitoring of research participant progress

Track PROMIS instrument administration longitudinally

Email alerts to research staff and participants

Enable multiple language assessments

Multiple modes of administration (e.g., integrated voice response)

Enable additional CAT models (partial credit model and dichotomous scoring)

User interface modifications

Enable use of multiple calibrations

Provide additional item presentation templates