This study investigates N400, the event related potential (ERP) that reflects semantic processing in cortex. The stimuli were semantically congruent vs. incongruent audio-visual pairings of objects (i.e. words presented in familiar picture context). As predicted, the results showed in time extended significant peak-to-peak differences between congruent and incongruent picture-word pairings at t...

Adult studies in the fields of neurolinguistic and mental chronometry suggest that syllable plays a functional role handwritten word production. These support hypothesis syllabified orthographic representation stored graphemic buffer. However, there remains question cognitive mechanisms involved this encoding representations and, particular, processes related to syllable. In study reported here...

Specific language impairment (SLI), a genetic developmental disorder, offers insights into the neurobiological and computational organization of language. A subtype, Grammatical-SLI (G-SLI), involves greater impairments in 'extended' grammatical representations, which are nonlocal, hierarchical, abstract, and composed, than in 'basic' ones, which are local, linear, semantic, and holistic. This ...

The ACT Programming Tutor (APT) is a problem solving environment constructed around an executable cognitive model of the programming knowledge students are acquiring. This cognitive model supports two types of adaptive instructional processes. First, it enables the tutor to follow each student’s solution path through complex problem solving spaces, providing appropriate assistance as needed. Se...