Interrogative suggestibility can be defined as “the extent to which, within a closed social interaction, people come to accept messages communicated during interrogation formal, which affects their subsequent response” (Gudjonsson and Clark, 1986, p.84). Gudjonsson and Clark (1986) proposed some distinctive characteristics of interrogative suggestibility. First, a process of questioning is involved regarding past events. Second, at lower levels there is a significant relationship with memory and intelligence (Gudjonsson, 1988a). Third, one of the essential factors is the acceptance of the suggestion proposed by the interrogator. Blagrove (1996) suggests that questions can sometimes be leading. A study by Blagrove (1996) showed that sleep-deprived participants were more susceptible to suggestibility than controls. Blagrove (1996) proposed that sleep-deprived individuals were more prone to decreased cognitive abilities and motivation. He explained that some questions might involve information that the interviewee might not initially agree with. For example, the interviewer may sometimes suggest an answer. Gisli H. Gudjonsson (1984, 1987) developed the Gudjonsson Suggestibility Scale (GSS) to measure an individual's susceptibility to suggestions. There are 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 news story related to an incident. Participants were asked to listen to the audio clip and answer some questions related to the story. The questions asked of the participants were mostly leading. In other words, it was not possible to answer the questions correctly based on the information... middle of article... to score higher in performance and movement than adults (Gudjonsson and Henry, 2003). On the contrary, the study carried out by Polczyk et al. (2004) demonstrated that older adults scored higher on performance than younger adults on the GSS 2. As noted previously, many studies have attempted to determine 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 aim of this study is to find the relationship between sleep and suggestibility. The current research hypothesized that people who get enough sleep are less likely to be sensitive to suggestibility and leading questions than participants who got less or no sleep. The present study also examined whether age was correlated with performance. 1.