The SpeechGraph software is a graph-theoretical analysis tool that uses text as input and graph features as output. SpeechGraph can run on many different platforms such as Linux, Windows and OSX.

Logo by G. M. Silva


We provide a User Guide as a PDF inside the software package, with a thorough explanation of all software functions. Alternatively, you can download it here.


You can download the latest version of the SpeechGraphs tool right here. The current software version is 1.0.39


We would like to receive your suggestions or bug reports. Please email to speechgraphs@neuro.ufrn.br.


The SpeechGraphs software was developed at the Brain Institute of the Federal University of Rio Grande do Norte (Natal, Brazil), by R. Furtado, P.P.C., Maia, N.B. Mota, S. Ribeiro, M. Copelli and D.F. Slezak.

If you use SpeechGraphs, please cite:

1) Mota, N.B., Furtado, R., Maia, P.P.C., Copelli, M. & Ribeiro, S. Graph analysis of dream reports is especially informative about psychosis. Sci. Rep. 4, 3691; DOI:10.1038/srep03691 (2014)

2) Mota NB, et al. (2012) Speech Graphs Provide a Quantitative Measure of Thought Disorder in Psychosis. PLoS ONE 7(4): e34928. doi: 10.1371/journal.pone.0034928

This software is distributed as is and without warranty of any kind. In no event shall the authors or copyright holders be liable for any claim, damages or other liability arising from the use of the software.

Additional references:

1- Mota NB, Callipo R, Leite L, Torres AR, Weissheimer J, Bunge SA, Copelli M, Ribeiro S (2019) Verbal Short-Term Memory Underlies Typical Development of “Thought Organization” Measured as Speech Connectedness. Mind, Brain, and Education https://doi.org/10.1111/mbe.12208;

2- Mota NB, Sigman M, Cecchi G, Copelli M, Ribeiro S (2018) The maturation of speech structure in psychosis is resistant to formal education. NPJ Schizophrenia 4 (1), 25. DOI: https://doi.org/10.1038/s41537-018-0067-3

3- Palaniyappan L Mota NB, Oowise S, Balain V, Copelli M, Ribeiro S, Liddle PF (2019). Speech structure links the neural and socio-behavioural correlates of psychotic disorders Progress in Neuro-Psychopharmacology and Biological Psychiatry 88, 112-120. DOI: 10.1016/j.pnpbp.2018.07.007.

4- Mota NB, Copelli M, Ribeiro S (2018) Graph Theory applied to speech: Insights on cognitive deficit diagnosis and dream research. In: Language, Cognition, and Computational Models. Edited by Thierry Poibeau and Aline Villavicencio. Publisher: Cambrigde University Press, pg 81-98. DOI: 10.1017/9781316676974.004

5- Mota NB, Copelli M, Ribeiro S (2017) Thought disorder measured as random speech structure classifies negative symptoms and Schizophrenia diagnosis 6 months in advance. NPJ Schizophrenia 3 (1) 18. DOI: 10.1038/s41537-017-0019-3

6- Mota NB, Carrillo F, Slezak DF, Copelli M, Ribeiro S (2016). Characterization of the relationship between semantic and structural language features in psychiatric diagnosis in Fiftieth Asilomar Conference on Signals, Systems and Computers. (IEEE Conference Publishing). DOI: 10.1109/ACSSC.2016.7869165

7- Mota NB, Weissheimer J, Madruga B, Adamy N, Bunge SA, Copelli M, Ribeiro S (2016) A Naturalistic Assessment of the Organization of Children's Memories Predicts Cognitive Functioning and Reading Ability. Mind, Brain, and Education 10 (3), 184-195 https://doi.org/10.1111/mbe.12122;

8- Bertola L*, Mota NB*, Copelli M, Rivero T, Diniz BR; Romano-Silva MA, Ribeiro S, Malloy-Diniz LF (2014) Graph analysis of verbal fluency test discriminate between patients with Alzheimer's disease, mild cognitive impairment and normal elderly controls. Frontiers in Aging Neuroscience, v. 6, p. 1-10. doi: 10.3389/fnagi.2014.00185 (*Shared 1º authorship)