Latest webinar

Understanding effect size and power analysis - Nov 17, 2021 | Noon

In “Understanding effect size and power analysis,” the BERD team discusses the different forms of effect sizes, considerations for their selection, interpretation, and recommendations for their use. The team also describes how power analysis is conducted by identifying the main elements and determining the appropriate module for deriving any of these elements. The webinar concludes with a demonstration of power analysis using software.

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Biostatistics resources


Graduate student projects are considered on a case-by-case basis, and the proposed work must serve to advance the research and/or funding portfolio of Illinois investigators.

Statistical consulting services geared toward students are also available across campus. For example, the Scholarly Commons at the Main Library offers statistical support for both undergraduate and graduate students. Certain colleges also offer no-cost statistical consulting to their students.

Please refer to Working with BERD for up-to-date rate information.

Depending on the complexity of the project, the time to provide the requested deliverable(s) ranges from three weeks up to four months. While all efforts will be made to accommodate deadlines, we strongly urge investigators to allow sufficient time to enable core members to work effectively with your team.

For example, additional time may be needed to add new content and incorporate feedback into the statistical analysis plan (SAP), or to revise a deliverable based on changes in the data set and discussions with the project team. For those projects which require a SAP, the project PI’s approval of the SAP is required to initiate the analyses.  Moreover, if the direction of the project changes and additional analyses are required, the project timeline will be reassessed.

Please acknowledge Illinois Biostatistics, Epidemiology, and Research Design (BERD) Core support by including the following in your submission(s): "We thank the Interdisciplinary Health Sciences Institute (IHSI) at the University of Illinois at Urbana-Champaign Illinois Biostatistics, Epidemiology, and Research Design (BERD) Core for supporting the work on this project.”

It is our policy to include the biostatistician as co-author for abstracts, manuscripts, posters, presentations, or other materials reporting statistical methods and analyses carried out by, or with significant contributions from, BERD biostatisticians. Please refer to Writing BERD Services into Grants.

As standard practice dictates, core biostatisticians are expected to have the opportunity to review and approve, prior to submission, all final versions of proposals and other products to which they contributed.

We ask that you complete the first and last name fields in a new Project Initiation Form and check “Yes” when asked whether the request is regarding a resubmission or renewal. We will then work to set you up with the biostatistician with whom you previously worked, if available.

The BERD team will send you an evaluation form upon completion of your project. You may also contact Gillian Snyder, IHSI Assistant Director for Research,

It may be necessary to replace the biostatistician working on your project due to workload concerns, conflict resolution purposes, or changes in the project requiring a different level or area of expertise. Replacement decisions are made only with consent of all relevant parties.