Interrogative suggestibility can be defined as "the extent to which, within a closed social interaction, people come to accept the messages communicated during formal questions, as a result their subsequent response is affected" (Gudjonsson and Clark, 1986, p.84). Gudjonsson and Clark (1986) proposed some distinctive characteristics of interrogative suggestibility. First, the process of questioning regarding past events is involved. Second, at lower levels it has a significant relationship with memory and intelligence (Gudjonsson, 1988a). Third, one of the essential factors is the acceptance of the suggestion offered by the questioner. Blagrove (1996) suggests that sometimes questions can be decisive. A study conducted by Blagrove (1996) demonstrated that sleep-deprived participants were more susceptible to suggestibility than controls. Blagrove (1996) proposed that sleep-deprived individuals were more prone to reduced cognitive abilities and motivation. He explained that some questions may involve information that the interviewee may not initially agree with. For example, sometimes the interviewer might suggest an answer. Gisli H. Gudjonsson (1984, 1987) developed the Gudjonsson Suggestibility Scale (GSS) to measure an individual's susceptibility to suggestions. There were two versions of the scale, the first suggestibility scale (GSS1) and the second suggestibility scale (GSS2). Both suggestibility scales contain an audio clip of a short story about some incident. Participants had to listen to the audio clip and answer some questions related to the story. The questions posed to the participants were mostly leading. In other words, it was not possible to answer the questions correctly starting from the information... in the center of the sheet... obtaining a higher score both in terms of performance and movement compared to adults (Gudjonsson and Henry, 2003). In contrast, the study conducted by Polczyk et al. (2004) provided evidence that older adults scored higher on achievement than younger adults on the GSS 2. As discussed above, there have been many studies that have attempted to find the trend between sleep and suggestibility (Balgrove, 1996; Horne, 1988b). Researchers have also attempted to uncover the effects of sleep deprivation (Payne, Ellenbogen, Walker, & Stickgold, 2008b; Dingo & Kribbs, 1991). The main purpose of this study is to find the relationship between sleep and suggestibility. Current research hypothesized that people who get enough sleep are less likely to be susceptible to suggestibility and misleading questions than participants who get less/no sleep. The present study also investigated whether age is related to yield 1.