Okim Kang is Professor of Applied Linguistics and Director of the Applied Linguistics Speech Lab at Northern Arizona University, Flagstaff, AZ. Her research interests include speech production and perception, L2 pronunciation and intelligibility, L2 oral assessment and testing, automated scoring and speech recognition, World Englishes, and language attitude. David O. Johnson is an associate teaching professor of Electrical Engineering and Computer Science at the University of Kansas. His research interests are in artificial intelligence, machine learning, natural language processing, and human-robot interaction. Alyssa Kermad is an assistant professor of Applied Linguistics and TESOL at California State Polytechnic University, Pomona. Her research interests are in second language speech and pronunciation, speech perception, prosody and pragmatics, second language acquisition, individual differences, and speech assessment.