A participant in a cognitive neuroscience study is staring out the window, mind-wandering and thinking about the weekend. Which of the following best describes what is happening in their brain?
ABrain activity is low overall because no demanding task is being performed
BThe default mode network is active, while task-positive networks are relatively quiet
CThe default mode network is suppressed because no external task is engaging it
DBeta and gamma waves are suppressed, indicating a near-sleep state
The default mode network (DMN) is most active during rest, mind-wandering, and self-referential thought — precisely when no demanding external task is running. During focused tasks, the DMN is suppressed and task-positive networks engage. Option A is a classic misconception: the brain never goes quiet; the DMN is metabolically expensive and highly active at rest. Option C reverses the pattern.
Question 2 Multiple Choice
A researcher announces they have identified the exact neural correlate of the conscious experience of seeing red — a specific pattern of activity in V4. Which conclusion is warranted?
AThe hard problem of consciousness is now solved for color perception
BThe functional explanation of color awareness is complete, and subjective experience is fully accounted for
CThe easy problems of color awareness are tractable, but why that neural pattern feels like something remains unexplained
DThe finding is philosophically irrelevant because neural correlates cannot address consciousness
Identifying a neural correlate of consciousness (NCC) addresses the 'easy problems' — explaining which brain states are associated with which experiences. The hard problem asks a different question: why does *any* neural activity produce subjective experience at all? Knowing the NCC for red does not explain why that pattern of firing feels like redness rather than nothing. Option A conflates the empirical and philosophical questions. Option D is wrong because NCCs are scientifically valuable; they just don't close the philosophical gap.
Question 3 True / False
Hypnosis is a form of altered consciousness in which the subject enters a sleep-like state, making them temporarily unconscious of their surroundings.
TTrue
FFalse
Answer: False
This is one of the most persistent misconceptions about hypnosis. Hypnotized individuals are awake, aware, and actively processing information — they are not unconscious by any neural measure. What changes is attentional focus and suggestibility: attention narrows, and critical evaluation is partially suspended, allowing suggestions to be processed more directly. Neuroimaging shows altered activity in the anterior cingulate cortex and prefrontal-sensory connections, but not the EEG signatures of sleep.
Question 4 True / False
The default mode network is most active when a person is not engaged in a demanding external task.
TTrue
FFalse
Answer: True
This is the core, counterintuitive finding about the DMN. Medial prefrontal cortex, posterior cingulate, and angular gyrus are more active during rest and mind-wandering than during focused task performance. The DMN is suppressed — not absent — when attention is directed outward. This finding changed how neuroscientists think about the 'resting' brain: it is not idle but engaged in a different, coordinated mode of processing.
Question 5 Short Answer
Why does identifying the neural correlate of a conscious experience not resolve the hard problem of consciousness?
Think about your answer, then reveal below.
Model answer: A neural correlate tells us which brain pattern accompanies a given experience, but it does not explain why that pattern is accompanied by any subjective experience at all. The hard problem is the explanatory gap between physical process and phenomenal experience — why does activity in neurons feel like something rather than nothing? No functional account, however complete, closes that gap, because you could imagine a functional system that processes information identically but has no inner experience.
The hard problem is conceptually distinct from the 'easy problems' (explaining attention, wakefulness, memory, behavioral responses). Easy problems are solved by functional explanation — we explain what a mechanism does and how. The hard problem asks why the mechanism is accompanied by experience at all. This is not a gap in current scientific knowledge but a conceptual puzzle about the relationship between the physical and the phenomenal.