Is the organism conscious at all?
Wakefulness, sleep, anesthesia?
Global state concerns the overall capacity for conscious processing.
Side 86
Consciousness
A study of subjective experience: what it means for there to be something it is like to see, feel, think or be. Consciousness research separates wakefulness, access, report and phenomenal experience before asking how any of them arise from physical systems.
state→content→access→report→experience
06consciousness lenses
05theory families
05explanatory gaps
86Side
“Consciousness” hides several different questions.
Being awake, having reportable information and having subjective experience are related but not identical.
What is experienced?
Color, pain, thought, emotion?
Different contents can enter or leave consciousness while level remains stable.
Is the information available for reasoning and action?
Usable beyond its source?
Access consciousness concerns functional availability to other systems.
Can the subject indicate the experience?
Verbal or behavioral evidence?
Report is evidence about consciousness, not consciousness itself.
What is it like?
Subjective character.
The felt quality of experience creates the central philosophical difficulty.
Conscious experience is structured.
Experience contains objects, qualities, body states, thoughts and a perspective from which they appear.
World-presenting experience.
Vision, audition and touch seem to reveal objects and properties directly.
Pain, balance, temperature, interoception.
The body can appear both as object and as the point from which the world is encountered.
Experience has valence.
Emotion and mood alter salience, meaning and felt significance.
Thought can itself be conscious.
Inner speech, imagery and felt understanding complicate simple sensory accounts.
Experience unfolds through time.
The present appears extended enough to contain change, sequence and rhythm.
Experience often feels owned.
A minimal sense of “for me” accompanies much conscious content.
Conscious information tends to become widely available.
One influential idea is that consciousness matters functionally because selected information can coordinate otherwise separate systems.
Broadcast
Information becomes globally available.
Once accessed, a representation can influence memory, planning, speech and action.
Report
Subjects can indicate content.
Reports are useful but can contaminate measurement by adding decision and motor processes.
Control
Conscious content can guide flexible behavior.
Novel planning appears to benefit from globally accessible information.
Metacognition
Some conscious states can be evaluated.
Confidence and introspective judgments provide another layer of evidence.
Dissociation
Processing can occur without reportable awareness.
Priming and blindsight-like phenomena constrain theories that equate processing with consciousness.
Theories disagree about what turns processing into conscious processing.
Each theory emphasizes a different transition: broadcast, recurrent interaction, higher-order representation, integration or prediction.
| Theory family | Core idea | Main question |
|---|---|---|
| Global workspace | Conscious information is widely broadcast | What gains global access? |
| Recurrent processing | Feedback loops matter beyond feedforward processing | Which recurrences are sufficient? |
| Higher-order | A mental state becomes conscious when represented by another state | What creates awareness of the state? |
| Integrated information | Consciousness relates to integrated causal structure | How should integration be defined and tested? |
| Predictive / active inference | Experience reflects hierarchical prediction and control | Why should prediction be conscious? |
Consciousness cannot be measured with a single meter.
Researchers triangulate subjective report, behavior, neural activity and perturbational responses.
Ask the subject.
Direct but dependent on language, memory, confidence and willingness.
Test what information guides behavior.
Above-chance performance can occur with weak or absent reported awareness.
Find activity associated with conscious content.
Correlation must be separated from prerequisites and consequences.
Reduce explicit reporting.
Attempts to isolate neural signatures from decision and motor demands.
Probe system responsiveness.
External stimulation can test complexity and integration in reduced-consciousness states.
No single measure is decisive.
Agreement across methods strengthens inference about conscious state or content.
Explaining function may still leave experience unexplained.
A complete account of discrimination, report and control could still leave the question of why those processes are accompanied by experience.
Mechanism
Explain how information is processed, integrated and made available.
Function
Explain what conscious access enables behaviorally.
Correlation
Identify physical states that reliably track experience.
Identity
Ask whether experience simply is some physical or functional state.
Explanatory gap
Ask why that state should have a felt character at all.
Consciousness and the Brainaccess and neural signatures
Global Workspace Theorybroadcast and access
The Conscious MindDavid Chalmers · explanatory gap
Neuroscience of Consciousnessmeasurement and competing theories