A diverse group of neuroscientists evaluated two rival theories of consciousness: Integrated Information Theory (IIT) and Global Neuron Workspace Theory (GNWT). IIT posits that consciousness arises when information within a system is intricately connected and unified, provided it is consciously recognized and functions as a cohesive entity. In contrast, GNWT proposes that a network of brain regions emphasizes significant information, bringing it to the forefront of our awareness and broadly sharing it as it enters consciousness, thereby forming a conscious experience.
Various theories elucidate how subjective experiences emerge from neural activity. While these theories have independent support, they have not been directly compared. Ferrante et al. We present an open science adversarial collaboration that juxtaposes Integrated Information Theory (IIT) with Global Neuron Workspace Theory (GNWT) through a theoretical Chinese consortium. Image credit: NASA/ESA/JPL-CALTECH/STSCI/SCI.NEWS.
Both philosophers and scientists have engaged in the pursuit of understanding the subjective aspects of consciousness (like experiencing pain or seeing vivid rainbows) and their connection to brain’s physical processes.
This endeavor has led to the simultaneous development of various consciousness theories, offering conflicting interpretations of the neural foundations of consciousness.
Moreover, empirical support for any given theory often hinges on methodological choices, pointing to potential confirmation bias in testing these theories.
A convergence of consciousness theories into a broadly accepted neuroscience framework could have profound medical, social, and ethical repercussions.
To facilitate this aim, the authors examined both IIT and GNWT through expansive open science adversarial collaborations designed to foster progress in consciousness research based on constructive disagreements.
“IIT proposes that consciousness results from the cooperation of various brain regions, integrating information much like a cohesive team effort,” the researchers noted.
“It arises from how these regions are interconnected and how they communicate, extending beyond just individual brain parts.”
“However, this research did not uncover sufficient sustained connections in the brain’s posterior areas to substantiate this notion.”
“The GNWT posits that consciousness is localized in the brain’s frontal regions, but this study also found inadequate evidence to support this idea,” they added.
This study included 256 participants, marking a significant milestone for this kind of experimentation.
Researchers displayed various visual stimuli and monitored the brain’s activity while participants viewed these stimuli using three common neuroimaging methods that track blood flow and electrical/magnetic activity.
“Our findings indicate a functional link between neurons in the early visual areas and those in the frontal regions, helping illuminate how perceptions are intertwined with thoughts,” they remarked.
“These results underscore the prefrontal cortex’s significance in consciousness, suggesting that while it plays a vital role in reasoning and planning, consciousness itself may be tied to sensory processing and perception.”
“In essence, intelligence pertains to actions taken, while consciousness refers to mere existence.”
“This discovery could reshape our understanding of consciousness and inform issues related to loss of consciousness, such as in comas and nutrition.”
Understanding the origins of consciousness could aid in identifying “secret awareness” in patients who are severely injured yet unresponsive.
“It became evident that no theory could definitively refute the other,” commented Professor Anil Seth from the University of Sussex.
“The theories pursue fundamentally different objectives in their assumptions and explanations, and the available experimental methods are too coarse to allow one theory to conclusively prevail over the other.”
“Regardless, the findings from this collaboration remain invaluable. There’s a wealth of insights to gain about both theories, along with new understandings of when and where visual experiences can be discerned in the brain.”
Survey results this week will be featured in the journal Nature.
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O. Ferrante et al. (Cogged the consortium). An antagonistic examination of global neuronal workspace and integrated information theory. Nature Released on April 30th, 2025. doi:10.1038/s41586-025-0888-1
Source: www.sci.news
