Shortened versions of the Gudjonsson Suggestibility Scale meet the standards

Purpose. The Gudjonsson Suggestibility Scale (GSS; Gudjonsson, 1984, 1997) is a well-established forensic tool for measuring interrogative suggestibility. However, one restriction of this tool is that it requires an extensive testing procedure. The present study examined whether shorter versions of the GSS yield similar results as the original GSS procedure. Methods. One group (N 1⁄4 20) was given a shortened version of the GSS that consisted of an immediate recall test and the specific questions. GSS scores in this group were compared with those in a group (N 1⁄4 20) that had the standard procedure which includes a retention interval and immediate and delayed recall tests. A third group (N 1⁄4 20) was administered a shortened procedure in which the 20 GSS questions immediately followed the GSS story. In the fourth group (N 1⁄4 20), participants were given the retention interval, but no recall tests were administered.