People are more likely to judge repeated information as true compared to novel information (the so-called truth effect). A key explanation for this phenomenon is the experienced fluency during the processing of repeated information. In fact, based on semantic and verbatim aspects, information repetition can be considered as a source of both: conceptual as well as perceptual fluency. Recent research suggests that the relative influence of conceptual and perceptual fluency on the repetition-based truth effect varies with the time between information presentations. However, in previous experiments conceptual and perceptual fluency was manipulated by changing the statements’ content to investigate these influences as a function of time (i.e., contradictory vs. non-contradictory statements, verbatim repetitions vs. paraphrases). In our study, we systematically manipulated perceptual processing fluency independently of the statements’ content to test the impact of different fluency accounts as a function of retention interval length. In addition to the fluency manipulation via repetition, we realized two judgment phases (10 minutes and 1 week after first exposure) and two experimental groups: One group was exposed to a short screen flickering in the middle of each statement presentation; the other (control) group received statement presentations without perceptual manipulations. Data collection is at an advanced stage, so that our findings can be presented at the conference.