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Abstract
Effective evaluation of cognitive performance is one of complex issue in product’s usability study. This paper proposed a comprehensive evaluation method for cognitive performance of product digital interface based on task decomposition, and extricated three objective indicators including brain electric feedback negativity, reaction timecorrect rate, which are easily to be measure,through operant behavior and cognition brain wave., so as to realize comprehensive evaluation of cognitive performance of product digital interface. Through example verification, it shows it can realize objective evaluation of “perceptibility, understanding, judgment” of digital interface based on these three indicators, respectively, and thus realize comprehensive evaluation of cognitive performance of product digital interface and explore a new ideal for evaluation of cognitive performance of product digital interface.