Article 1 Articulation rate Cluttering 1 Humans 1 Language 1 Speech 1 Speech Disorders 1 Speech Production Measurement 1 Speech rhythm 1 Stuttering 1 Syllable-timed language 1 adult 1 cluttering 1 controlled study 1 female 1 heart rate 1 heart rhythm 1 human 1 language 1 major clinical study 1 male 1 speech 1 speech analysis 1 speech articulation 1 speech disorder 1 speech perception 1 stuttering 1