VAOPGCPREC 36-97
The SIP is a frequently used 136-item measure of perceived impairment (Brown, 1995; Williams, 1988) with excellent test-retest reliability (.92) and internal consistency (.94; Bergner, 1981). The instructions for the version most often used with individuals with pain were altered by Turner and Clancy (1988) to reflect pain-related impairment ... ................
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