The global workspace theory (GWT) was first put forth by Bernard Baars (1988, 1997, 2002). The focus of current research is on computer simulations and brain interpretations of GWT.
Working memory is similar to the idea of GWT, and it is argued that it relates to a “momentarily active.
A “theatre metaphor” can be used to explain GWT. In the “theatre of consciousness,” a bright spot is cast by a “spotlight of selective attention” on the stage. The actors can be seen coming and going, conversing, and interacting with one another in the bright area, along with the contents of consciousness. The audience is not lit and is watching the play in the dark (i.e., unconscious). Behind the scenes, the director (executive processes), stagehands, scriptwriters, scene designers, and others are at work. Despite being invisible, they shape the apparent acts in the ideal manner.
Overview
The GWT involves a brief, seconds-long recall. GWT contents are transmitted with various unconscious cognitive brain activity, also known as receiving processes, and are theorised to correspond to what we are aware of. Additionally, additional unconscious processes that are active at the same time and barely interact with one another could forge alliances that act as input processes for the global workspace.
Due to the ability of globally broadcast messages to cause responses in receiving systems all over the brain, we may be able to use the global workspace to exercise executive control and perform voluntary actions. In order to recruit additional cohorts and, consequently, increase their odds of success, they also try to distribute their messages to all other processes. Therefore, in order to compete for attention and conscious access, it is required to temporarily store incoming inputs. Kouider and Dehaene foresaw the sensory memory that retains stimuli for “a few hundred milliseconds.” Recent studies demonstrate a progressive decline and early support for such a buffer storage, with the ability to extract useful information becoming significantly less effective after 300 ms and completely gone after 700 ms.
According to Baars (1997), “conscious experience is tightly tied to the global workspace.” Michael S. Gazzaniga, among other scientists, asserts that additional criteria may be present in conscious events.
Conclusion
However, GWT can faithfully replicate a number of characteristics of consciousness, such as how it responds to novel situations, how much it can do, how it works sequentially, and how it might trigger different unconscious brain processes. Furthermore, GWT is ideal for computational modelling. The IDA model by Stan Franklin is one example of a GWT computational application.
The dorsal cortical stream of the visual system is another “behind the scenes” contextual mechanism mentioned by GWT that subconsciously shapes conscious contents. By using this architectural approach, specific neurological hypotheses are generated. Two sensory events may fight for the attention of the brain if their contents are incompatible in their respective modalities. For instance, instead of merging, the audio and visual streams of a movie compete when they need to be in sync. The 100 ms time domain and the basic brain physiology of consciousness are roughly equivalent.
