Cogent 2000

Cogent 2000 is a MATLAB Toolbox for presenting stimuli and recording responses with precise timing. Cogent 2000 incorporates Cogent Graphics and provides additional utilities for the manipulation of sound, keyboard, mouse, joystick, serial port, parallel port, subject responses and physiological monitoring hardware. For fMRI experiments, Cogent 2000 can be configured to receive synchronisation pulses from a scanner allowing experimental timing to be tightly coupled with image acquisition.

Continue to download page.

Demonstrations

Here you can view some movies illustrating some of the visual and auditory presentation capabilities of Cogent. The sample scripts demonstrate how easily these experiments can be programmed. These movies are not actual experiments but simple illustrations of the type of stimuli that could be used in a psychophysical or neuroimaging environment. The subject responses can be measured and logged and the timing of the Cogent scripts can be controlled from within the script or by external hardware (e.g. by an MRI scanner).

Click on the small image to view the movie. Be warned that the movie files are quite large (up to 2Mb) and may take some time to download.

Faces video

This example is a simple block design experiment to compare the subject's response to famous faces with a baseline condition of scrambled faces. The script demonstrates how the images contained in a series of graphics files can be displayed using Cogent 2000. Source code.

Sounds video

This example is a simple block design experiment to compare the subject's response to blocks of words during which semantic processing is manipulated by the question associated with each block. The script demonstrates how a set of sound files can be played using Cogent 2000. Source code.

Stroop video

This example is a single event-type experiment to investigate the subject's attentional response to a mismatch compared with a match between word colour and meaning. The script demonstrates how strings of different colours and sizes can be presented using Cogent 2000. Source code.

Latest news - lectures

  • Announcing the first undergraduate course in Neuroesthetics at UCL (starting 2 October 2017)
  • Future engagement: 7 September 2017 Opening lecture: Aesthetic Experiences and their Uses at 13:00 at a conference entitled The Power of Motifs at the University of Oslo, Norway
  • Future engagement: 13 September 2017 A lecture on The Neurobiology of Beauty at 16:20 at the Monakow Lecture Hall, Clinic for Neurology, University of Zurich (part of the Scientific Symposium for the 25th anniversary of the Koetser Foundation)
  • Future engagement: 30 September - 2 October 2017 A lecture on The Experience of Mathematical Beauty at the Altius Society, Oxford
  • Future engagement: 10 October 2017 A lecture on The Neurobiology of Beauty and Its Implications at 13:00 at the Faraday Institute, Cambridge (Garden Room, Library Building, St Edmund's College, Cambridge CB3 0BN)
  • Future engagement: 23 November 2017 A lecture on The Neurobiology of Beauty and Its Implications 18:00-19:30 at the University Centre Somerset, Wellington Road, Taunton, Somerset TA1 5AX
  • Future engagement: 15 February 2018 Cognition Lecture at the T S Srinivasan NIMHANS Conclave
  • Future engagement: 17 February 2018 The Ramon y Cajal Award lecture of INA, Bengaluru, India
  • Future engagement: 18 February 2018 The T S Srinivasan Oration, Chennai, India

Latest news - publications

  • Recently appeared: The Bayesian-Laplacian Brain Semir Zeki, Oliver Y. Chén bioRXiv
  • Recently appeared: Imaging the passionate stage of romantic love by dopamine dynamics by Kayo Takahashi, Kei Mizuno, Akihiro T Sasaki, Yasuhiro Wada, Masaaki Tanaka, Akira Ishii, Kanakao Tajima, Naohiro Tsuyuguchi, Kyosuke Watanabe, Semir Zeki and Yasuyoshi Watanabe is now available in Frontiers in Human Neuroscience
  • Recently appeared: A special issue of The Philosophical Transactions of the Royal Society, edited by Semir Zeki, to commemorate the 350th anniversary of the birth of this, the first peer-reviewed journal, is now online. It is entitled "Cerebral Cartography: a vision of its future" and contains, among other articles, ones giving detailed descriptions of the American, European and Japanese brain initiative programmes.
  • Recently appeared: A massively asynchronous, parallel brain by Semir Zeki is now available in Philosophical Transactions of the Royal Society B.
  • Recently appeared: Area V5 - a microcosm of the visual brain by Semir Zeki is now available in Frontiers in Integrative Neuroscience
  • Recently appeared: Parallel processing of face and house stimuli by V1 and specialized visual areas: a magnetoencephalographic (MEG) study by Yoshihito Shigihara and Semir Zeki is now available in Frontiers in Human Neuroscience
  • Recently appeared: A neurobiological enquiry into the origins of our experience of the sublime and beautiful by Tomohiro Ishizu and Semir Zeki is now available in Frontiers in Human Neuroscience
  • Recently appeared: Neurobiology and the Humanities by Semir Zeki is now available in Neuron
  • Recently appeared: Non-binding relationship between visual features by Dragan Rangelov and Semir Zeki is now available in Frontiers in Human Neuroscience
  • Recently appeared: Parallel processing in the brain's visual form system: An fMRI study by Yoshihito Shigihara and Semir Zeki in Frontiers in Human Neuroscience
  • Recently appeared: Masking reveals parallel form systems in the visual brain by Yu Tung Lo and Semir Zeki in Frontiers in Human Neuroscience
  • Now available: The role of parietal cortex in the formation of colour and motion based concepts by Samuel W. Cheadle and Semir Zeki in Frontiers in Human Neuroscience
  • Now available: Semir Zeki's first book, A Vision of the Brain, can be downloaded here.
  • Now available: Perceptual asynchrony for motion by Yu Tung Lo and Semir Zeki in Frontiers in Human Neuroscience.
  • Now available: Varieties of perceptual instability and their neural correlates by Tomohiro Ishizu and Semir Zeki in Neuroimage.
  • Now available: The experience of mathematical beauty and its neural correlates by Semir Zeki, John Romaya, Dionigi Benincasa and Sir Michael Atiyah in Frontiers in Human Neuroscience.
  • Now available: The "Visual Shock" of Francis Bacon: an essay in neuroesthetics by Semir Zeki and Tomohiro Ishizu in Frontiers in Human Neuroscience.
  • Now available: Clive Bell's "Significant Form" and the neurobiology of aesthetics by Semir Zeki is now available under open access in Frontiers in Human Neuroscience.
  • Now available: The brain's specialized systems for aesthetic and perceptual judgments by Semir Zeki and Tomohiro Ishizu is now available under open access in the European Journal of Neuroscience.
  • Now available: Parallelism in the brain's visual form system by Semir Zeki and Yoshihito Shigihara is now available in the European Journal of Neuroscience.
  • Now available: Splendors and Miseries of the Brain is now available in Greek and Polish (also available in Spanish, Italian and German).