User profiles for Guillermo A. Cecchi

Guillermo Cecchi

IBM Research
Verified email at us.ibm.com
Cited by 10468

Scale-free brain functional networks

VM Eguiluz, DR Chialvo, GA Cecchi, M Baliki… - Physical review …, 2005 - APS
Functional magnetic resonance imaging is used to extract functional networks connecting
correlated human brain sites. Analysis of the resulting networks in different tasks shows that (a…

[HTML][HTML] Automated analysis of free speech predicts psychosis onset in high-risk youths

G Bedi, F Carrillo, GA Cecchi, DF Slezak, M Sigman… - npj …, 2015 - nature.com
AIMS: In this proof-of-principle study, our aim was to test automated speech analyses
combined with Machine Learning to predict later psychosis onset in youths at clinical high-risk (…

Prediction of psychosis across protocols and risk cohorts using automated language analysis

…, C Klim, DC Javitt, CE Bearden, GA Cecchi - World …, 2018 - Wiley Online Library
Language and speech are the primary source of data for psychiatrists to diagnose and treat
mental disorders. In psychosis, the very structure of language can be disturbed, including …

Global organization of the Wordnet lexicon

M Sigman, GA Cecchi - Proceedings of the National …, 2002 - National Acad Sciences
The lexicon consists of a set of word meanings and their semantic relationships. A systematic
representation of the English lexicon based in psycholinguistic considerations has been …

On a common circle: Natural scenes and Gestalt rules

M Sigman, GA Cecchi, CD Gilbert… - Proceedings of the …, 2001 - National Acad Sciences
To understand how the human visual system analyzes images, it is essential to know the
structure of the visual environment. In particular, natural images display consistent statistical …

Seeing with the eyes shut: Neural basis of enhanced imagery following ayahuasca ingestion

DB De Araujo, S Ribeiro, GA Cecchi… - Human brain …, 2012 - Wiley Online Library
The hallucinogenic brew Ayahuasca, a rich source of serotonergic agonists and reuptake
inhibitors, has been used for ages by Amazonian populations during religious ceremonies. …

Predicting human olfactory perception from chemical features of odor molecules

…, G Stolovitzky, GA Cecchi… - Science, 2017 - science.org
It is still not possible to predict whether a given molecule will have a perceived odor or what
olfactory percept it will produce. We therefore organized the crowd-sourced DREAM …

[HTML][HTML] Speech graphs provide a quantitative measure of thought disorder in psychosis

…, N Lemos, AC Pieretti, O Kinouchi, GA Cecchi… - PloS one, 2012 - journals.plos.org
Background Psychosis has various causes, including mania and schizophrenia. Since the
differential diagnosis of psychosis is exclusively based on subjective assessments of oral …

Prediction and interpretation of distributed neural activity with sparse models

MK Carroll, GA Cecchi, I Rish, R Garg, AR Rao - NeuroImage, 2009 - Elsevier
We explore to what extent the combination of predictive and interpretable modeling can
provide new insights for functional brain imaging. For this, we apply a recently introduced …

Using language processing and speech analysis for the identification of psychosis and other disorders

CM Corcoran, GA Cecchi - Biological Psychiatry: Cognitive Neuroscience …, 2020 - Elsevier
Increasingly, data-driven methods have been implemented to understand psychopathology.
Language is the main source of information in psychiatry and represents “big data” at the …