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freehorselast Wednesday at 6:27 PM1 replyview on HN

Yeah I agree mostly. Cognition happens in multiple timescales, as such I don't think that fmri's sampling rate is a problem if we understand which cognitive phenomena it can actually address and which not. But there is definitely a tendency to not understand such limits of our tools.


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D-Machinelast Wednesday at 8:21 PM

Precisely, if we restrict fMRI to investigating phenomena and theories of cognition and the mind that are plausibly measurable at the appropriate temporal resolution, it will potentially start yielding some fruit.

It will also require fMRI researchers to think more carefully about their theories as well (e.g. noting the speed of the mind / amount and kinds of thinking involved in certain tasks, and being realistic about whether or not fMRI could actually capture something meaningful there). Too often there is no theory, and too many studies are just correlating patterns with some task without actually carefully thinking about the task and deconstructing the components, testing activations in those (e.g. ablation studies in AI research) and etc.