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Synesthesia is a phenomenon that has captivated the interest of many researchers, as it is a unique experience of the blending of the senses. The following study was conducted in an effort to understand whether synesthetic experiences can be learned, as Bor, Rothen, Schwartzman, Clayton, & Seth (2014) claimed. While there has been much research demonstrating that synesthesia is more common in the population than previously thought, and likely to develop in young children as a learning mechanism (Watson et al., 2017a), there have not been as many event-related brain potential (ERP) studies conducted on synesthesia. ERP studies are important for synesthesia, since neural phenomena are often best measured through brain monitoring technologies, such as magneto/electroencephalography (MEG/EEG), ERP, functional Magnetic Resonance Imaging (fMRI). The current study utilizes the measurement of continuous neural data through a pre- and post-test ERP study monitoring changes occurring at the Pz electrode site for the visual N100, auditory N100, and the P300 ERP components in 15 neurotypical, non-synesthetic college-age adults. The goal of this study was to understand whether non-synesthetes can have a synesthetic experience or are merely forming a learned association after 4 weeks of grapheme-color task, and chromesthesia task training. The results show that while participants can be trained to form learned associations between letters and colors, and sounds and color as shown by a significantly reduced P300 amplitude, they do not seem to have synesthetic experiences as was previously indicated—as demonstrated by the nonsignificant change in both N100 components.



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