Depressed patients talk differently when they are depressed compared to when they are well. But it is hard to actually measure what the differences are. The study team will record voice samples from patients with mood disturbances, like depression, over the course of their receiving an electroconvulsive therapy (ECT) series. The study team will try and measure or quantify exactly what has changed in their speech and voice. The study team will choose ECT as it is one of the most effective and rapid treatment for depression. The study team will use a service provided by a company, NeuroLex, who has complex computer programs (artificial intelligence, AI) to analyze the voice samples.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Acoustic feature: zero crossing rate
Timeframe: Throughout a course of electroconvulsive therapy (ECT) which may last between 2 and 7 weeks.
Acoustic feature: energy and entropy
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Acoustic feature: spectral centroid, spectral spread, spectral entropy, spectral flux, spectral rolloff
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Acoustic feature: Mel-Frequency Cepstral Coefficients, Chroma Vectors, and Chroma Deviation
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic features: question ratio, filler ratio, number ratio, type token ratio
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic features: verb frequency, noun frequency, pronoun frequency, adverb frequency, adjective frequency, particle frequency, conjunction frequency, pronoun frequency
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic features: standardized word entropy
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic features: Brunets index
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic features: Honores statistic
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic features: rate of speech
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: fatigue
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: audio quality
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: sentiment
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: stress
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: gender
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: accent
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: length
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-features: age
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Comparing the voice feature(s) with greatest statistically significant change to Patient Health Questionnaire (PHQ)-9 scores
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Acoustic Feature Specific Changes within and across sessions
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Linguistic Feature Specific Changes within and across sessions
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.
Meta-Feature Specific Changes within and across sessions
Timeframe: Throughout a course of electroconvulsive therapy which may last between 2 and 7 weeks.