EXHIBIT 23.1


                   CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated March 1, 2007, accompanying the consolidated
financial statements and schedules (which report expressed an unqualified
opinion and contains an explanatory paragraph relating to the adoption of
Statement of Financial Accounting Standards No. 123R, "Share-Based Payment") and
management's assessment of the effectiveness of internal control over financial
reporting and the effectiveness of internal control over financial reporting of
SPSS Inc. and subsidiaries included in the Annual Report on Form 10-K for the
year ended December 31, 2006, which are incorporated by reference in this
Registration Statement. We consent to the incorporation by reference in the
Registration Statement of the aforementioned reports and to the use of our name
as it appears under the caption "Experts."

/s/ GRANT THORNTON LLP

Chicago, Illinois
August 31, 2007