One book, Mind Hacks, iirc tangentially described that and experimented on a reader’s consciousness. The core idea was that a brain (mind) is not an instantly accessible state, but a continuous process of collecting all reactions into an observable picture, like stock exchange protocols (anyone who has programmed them will understand). E.g. everyone lives a little “in the past”, because what you see is what really was few moments ago, all the time. And it’s not just a neuron-neuron latency. Mind is an asynchronous process with many parts “getting in sync” retroactively, sometimes for a good reason, e.g. if audio and vision or tactility are out of sync, your mind allows up to 80ms of delay before raising that “obviously out-of-sync” flag. And in general, a large part of what you “perceive” is just a funny reconstruction. So, returning to:
it’s difficult to pinpoint the moment at which you make the decision
That’s because your “present” may lag or skip ahead for a large amount of “frames” and there is no common #clk for a reference. Also, mind may completely omit reporting the decision process to itself, cause there is no existential profit for doing that. As someone who suffers from panic attacks, I can tell you that it’s damn hard to isolate and revisit specific thoughts and feelings that may have provoked that condition few moments ago. I only learn that slowly because it’s a part of a therapy, and otherwise it is completely imperceptible.
Tl;dr: perception and mind-related expectations in these experiments may be too naive.