  Recent studies in speech perception have been closely linked to fields of
cognitive psychology, phonology, and phonetics in linguistics. During
perceptual attunement, a critical and sensitive developmental trajectory has
been examined in bilingual and monolingual infants where they can best
discriminate common phonemes. In this paper, we compare and identify these
cognitive aspects on deep neural-based visual lip-reading models. We conduct
experiments on the two most extensive public visual speech recognition datasets
for English and Mandarin. Through our experimental results, we observe a strong
correlation between these theories in cognitive psychology and our unique
modeling. We inspect how these computational models develop similar phases in
speech perception and acquisitions.
