The present study examined whether scores on the Dissociative Experiences Scale (DES) are related to interrogative suggestibility, as measured by the Gudjonsson Suggestibility Scale (GSS-1). In addition, an attempt was made to identify factors that may mediate this relationship. The DES and GSS were administered to a sample of 56 female undergraduate students along with self-report measures of cognitive failures and fantasy proneness. DES and cognitive failures were found to be related to total GSS scores. In contrast, fantasy proneness was not linked to total GSS scores. Correcting for the influence of cognitive failures attenuated the correlation between DES and GSS. This suggests that cognitive efficiency is one of the mediating factors operating in the connection between dissociation and interrogative suggestibility.