Interpreting symptoms of cognitive load in speech input
UM '99 Proceedings of the seventh international conference on User modeling
Recognizing Time Pressure and Cognitive Load on the Basis of Speech: An Experimental Study
UM '01 Proceedings of the 8th International Conference on User Modeling 2001
Automatic cognitive load detection from speech features
OZCHI '07 Proceedings of the 19th Australasian conference on Computer-Human Interaction: Entertaining User Interfaces
Speech Under Stress: Analysis, Modeling and Recognition
Speaker Classification I
Frame vs. Turn-Level: Emotion Recognition from Speech Considering Static and Dynamic Processing
ACII '07 Proceedings of the 2nd international conference on Affective Computing and Intelligent Interaction
Phase based features for cognitive load measurement system
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Attuning in-car user interfaces to the momentary cognitive load
FAC'07 Proceedings of the 3rd international conference on Foundations of augmented cognition
A non-uniform subband approach to speech-based cognitive load classification
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
A Study of Voice Source and Vocal Tract Filter Based Features in Cognitive Load Classification
ICPR '10 Proceedings of the 2010 20th International Conference on Pattern Recognition
Multimodal behavior and interaction as indicators of cognitive load
ACM Transactions on Interactive Intelligent Systems (TiiS) - Special issue on highlights of the decade in interactive intelligent systems
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Cognitive load measurement systems measure the mental demand experienced by human while performing a cognitive task, which is useful in monitoring and enhancing task performance. Various speech-based systems have been proposed for cognitive load classification, but the effect of cognitive load on the speech production system is still not well understood. In this work, we study formant frequencies under different load conditions and utilize formant frequency-based features for automatic cognitive load classification. We find that the slope, dispersion, and duration of vowel formant trajectories exhibit changes under different load conditions; slope and duration are found to be useful features in vowel-based classification. Additionally, 2-class and 3-class utterance-based classification results, evaluated on two different databases, show that the performance of frame-based formant features was comparable, if not better than, baseline MFCC features.