Prosodic features 8 American English 4 Learning systems 4 Linguistics 4 Prosody 4 Speech communication 4 Comparable corpora 2 Complex signal 2 Computational linguistics 2 Computer aided instruction 2 Computer assisted language learning 2 Computer-assisted language learning 2 Consumer products 2 Continuous speech recognition 2 Conversational speech 2 Cross-linguistic 2 Dialogue 2 Discourse structure 2 E-learning 2 Feature extraction 2 Gaussian Mixture Model 2 Gaussian mixture models 2 Individual Differences 2 Lexical stress detection 2 Mel frequency cepstral co-efficient 2 Mel frequency cepstral coefficients 2 Probability 2 RST 2 Rhetorical relations 2 Rhetorical structure theory 2