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                                  EXHIBIT 23.1



               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

         We consent to the incorporation by reference in the Registration
Statement (Form S-8) pertaining to the Information Resources, Inc. Employee
Stock Purchase Plan of our report dated February 9, 2000, with respect to the
consolidated financial statements and schedule of Information Resources, Inc.
included in its Annual Report (Form 10-K) for the year ended December 31, 1999,
filed with the Securities and Exchange Commission.



/s/ ERNST & YOUNG, LLP
---------------------------
Chicago, Illinois
June 15, 2000