Now showing items 1-20 of 43

    • A lesion model of envy and "Schadenfreude" : legal, deservingness and moral dimensions as revealed by neurodegeneration 

      Santamaría-García, Hernando; Baez, Sandra; Reyes, Pablo; Santamaría-García, José A.; Santacruz-Escudero, José M.; Matallana, Diana; Arévalo, Analía; Sigman, Mariano; García, Adolfo M.; Ibáñez, Agustín (2017-08-21)
      The study of moral emotions (i.e. Schadenfreude and envy) is critical to understand the ecological complexity of everyday interactions between cognitive, affective, and social cognition processes. Most previous studies in ...
    • A massive experiment on choice blindness in political decisions : confidence, confabulation, and unconscious detection of self-deception 

      Rieznik, Andrés; Moscovich, Lorena; Frieiro, Alan; Figini, Julieta; Catalano, Rodrigo; Garrido, Juan Manuel; Álvarez Heduan, Facundo; Sigman, Mariano; González, Pablo A. (207-02-14)
      We implemented a Choice Blindness Paradigm containing political statements in Argentina to reveal the existence of categorical ranges of introspective reports, identified by confidence and agreement levels, separating ...
    • An entropic barriers diffusion theory of decision-making in multiple alternative tasks 

      Fernandez Slezak, Diego; Sigman, Mariano; Cecchi, Guillermo A. (2018-03-02)
      We present a theory of decision-making in the presence of multiple choices that departs from traditional approaches by explicitly incorporating entropic barriers in a stochastic search process. We analyze response time ...
    • Arithmetic on your phone : a large scale investigation of simple additions and multiplications 

      Zimmerman, Federico; Shalom, Diego; González, Pablo A.; Garrido, Juan Manuel; Álvarez Heduan, Facundo; Dehaene, Stanislas; Sigman, Mariano; Rieznik, Andrés (2016-12-29)
      We present the results of a gamified mobile device arithmetic application which allowed us to collect vast amount of data in simple arithmetic operations. Our results confirm and replicate, on a large sample, six of the ...
    • Attachment patterns trigger differential neural signature of emotional processing in adolescents 

      Escobar, María Josefina; Rivera-Rei, Álvaro; Decety, Jean; Huepe, David; Cardona, Juan Felipe; Canales-Johnson, Andrés; Sigman, Mariano; Helgiu, Elena; Mikulan, Ezequiel P.; Baez, Sandra; Manes, Facundo; Lopez, Vladimir; Ibañez, Agustín (2013-08-05)
      Background: Research suggests that individuals with different attachment patterns process social information differently, especially in terms of facial emotion recognition. However, few studies have explored social ...
    • Attention, in and out : scalp-level and Intracranial EEG correlates of interoception and exteroception 

      García-Cordero, Indira; Esteves, Sol; Mikulan, Ezequiel P.; Hesse, Eugenia; Baglivo, Fabricio H.; Silva, Walter; García, María del Carmen; Vaucheret, Esteban; Ciraolo, Carlos; García, Hernando S.; Adolfi, Federico; Pietto, Marcos; Herrera, Eduar; Legaz, Agustina; Manes, Facundo; García, Adolfo M.; Sigman, Mariano; Bekinschtein, Tristan A.; Ibáñez, Agustín; Sedeño, Lucas (2017-07-19)
      Interoception, the monitoring of visceral signals, is often presumed to engage attentional mechanisms specifically devoted to inner bodily sensing. In fact, most standardized interoceptive tasks require directing attention ...
    • Automated analysis of free speech predicts psychosis onset in high-risk youths 

      Bedi, Gillinder; Carrillo, Facundo; Cecchi, Guillermo A.; Fernández Slezak, Diego; Sigman, Mariano; Mota, Natália B.; Ribeiro, Sidarta; Javitt, Daniel C.; Copelli, Mauro; Corcoran, Cheryl M. (2015-08-26)
      BACKGROUND/OBJECTIVES: Psychiatry lacks the objective clinical tests routinely used in other specializations. Novel computerized methods to characterize complex behaviors such as speech could be used to identify and predict ...
    • Bayesian validation of grammar productions for the language of thought 

      Romano, Sergio; Salles, Alejo; Amalric, Marie; Deahene, Stanislas; Sigman, Mariano; Figueira, Santiago (2018-07-10)
      Probabilistic proposals of Language of Thoughts (LoTs) can explain learning across differ- ent domains as statistical inference over a compositionally structured hypothesis space. While frameworks may differ on how a LoT ...
    • Bridging psychology and mathematics : can the brain understand the brain? 

      Sigman, Mariano (2004-09-14)
      We are told scientists are divided into experimentalists and theoreticians. The dialectic description of the dynamics of science, with one tribe gathering data and collecting evidence and another tribe providing form to ...
    • Choosing in freedom or forced to choose? Introspective blindness to psychological forcing in stage-magic 

      Shalom, Diego E.; Serro, Maximiliano G. de Sousa; Giaconia, Maximiliano; Martínez, Luis M.; Rieznik, Andrés; Sigman, Mariano (2013-03-13)
      We investigated an individual ability to identify whether choices were made freely or forced by external parameters. We capitalized on magical setups where the notion of psychological forcing constitutes a well trodden ...
    • Chronotype at the beginning of secondary school and school timing are both associated with chronotype development during adolescence 

      Goldín, Andrea Paula; Sigman, Mariano; Rodríguez Ferrante, Guadalupe; Leone, María Juliana (Scientific Reports, 2022)
      The misalignment between late chronotypes and early school start times affect health, performance and psychological well-being of adolescents. Here we test whether, and how, the baseline chronotype (i.e. chronotype at the ...
    • Collective behavior in the spatial spreading of obesity 

      Gallos, Lazaros K.; Barttfeld, Pablo; Havlin, Shlomo; Sigman, Mariano; Makse, Hernán A. (2012-06-12)
      Obesity prevalence is increasing in many countries at alarming levels. A difficulty in the conception of policies to reverse these trends is the identification of the drivers behind the obesity epidemics. Here, we implement ...
    • Confidence through consensus : a neural mechanism for uncertainty monitoring 

      Paz, Luciano; Insabato, Andrea; Zylberberg, Ariel; Deco, Gustavo; Sigman, Mariano (2016-02-24)
      Models that integrate sensory evidence to a threshold can explain task accuracy, response times and confidence, yet it is still unclear how confidence is encoded in the brain. Classic models assume that confidence is ...
    • Dazzled by the mystery of mentalism : the cognitive neuroscience of mental athletes 

      Rieznik, Andrés; Lebedev, Mikhail; Sigman, Mariano (2017-05-31)
      Neural processing bymental athletes (MAs) has received attention fromNeuroscience community, with several publications examining superior memorizers (Maguire et al., 2003; Bor et al., 2008), lighting calculators (Pesenti ...
    • Delays without mistakes : response time and error distributions in dual-task 

      Kamienkowski, Juan Esteban; Sigman, Mariano (2008-09-12)
      Background: When two tasks are presented within a short interval, a delay in the execution of the second task has been systematically observed. Psychological theorizing has argued that while sensory and motor operations ...
    • Disentangling interoception : insights from focal strokes affecting the perception of external and internal milieus 

      Couto, Blas (2015-05-01)
      Interoception is the moment-to-moment sensing of the physiological condition of the body. The multimodal sources of interoception can be classified into two different streams of afferents: an internal pathway of signals ...
    • Diversity of opinions promotes herding in uncertain crowds 

      Navajas, Joaquin; Armand, Oriane; Moran, Rani; Bahrami, Bahador; Deroy, Ophelia (Royal Society Open Science, 2022)
      Classic and recent studies demonstrate how we fall for the ‘tyranny of the majority' and conform to the dominant trend when uncertain. However, in many social interactions outside of the laboratory, there is rarely a clearly ...
    • Dynamics of the central bottleneck : dual-task and task uncertainty 

      Sigman, Mariano; Dehaene, Stanislas (2006-06-27)
      Why is the human brain fundamentally limited when attempting to execute two tasks at the same time or in close succession? Two classical paradigms, psychological refractory period (PRP) and task switching, have independently ...
    • Empathy for others’ suffering and its mediators in mental health professionals 

      Santamaría-García, Hernando; Baez, Sandra; García, Adolfo M.; Flichtentrei, Daniel; Prats, María; Mastandueno, Ricardo; Sigman, Mariano; Matallana, Diana; Cetkovich, Marcelo; Ibáñez, Agustín (2017-07-25)
      Empathy is a complex cognitive and affective process that allows humans to experience concern for others, comprehend their emotions, and eventually help them. In addition to studies with healthy subjects and various ...
    • How do you feel when you can’t feel your body? Interoception, functional connectivity and emotional processing in depersonalization-derealization disorder 

      Sedeño, Lucas; Couto, Blas; Melloni, Margherita; Canales-Johnson, Andrés; Yoris, Adrian; Baez, Sandra; Esteves, Sol; Velasquez, Marcela; Barttfeld, Pablo; Sigman, Mariano; Kichic, Rafael; Chialvo, Dante; Manes, Facundo; Bekinschtein, Tristan A.; Ibáñez, Agustín (2014-06-26)
      Depersonalization-Derealization Disorder (DD) typically manifests as a disruption of body self-awareness. Interoception 2 defined as the cognitive processing of body signals2 has been extensively considered as a key ...