Good question.
Let us go through the sequences of events for the first experiment. The correct explanation, of course, involves the gandhabba (our mental body).
The mental body is what decides. The physical body moves according to those decisions made by the mind. Specifically, muscle activity of hands controlled by the brain carries our the button press.
The time sequence is as follows:
1. The mind (the mind-base is hadaya vatthu located close to the physical heart) decides to press, say with the right hand (T0).
2. The decision is conveyed to the brain. This happens possibly via electromagnetic waves propagating from the area of the heart to the brain. (T1)
3. The brain activates the muscles in the right hand and the button is pressed (T2)
This experiment is not as good as the second experiment, since each individual may also take some time deliberating which hand to use to press the button. I think that is why this time delay in this particular case was 6 seconds, unusually large compared to the delays in the second set of experiments.
– So, if we take that large uncertainty out, then the steps in 1 through 3 would be similar to those in the second set of experiments. Of course, the second set of experiments involves a different set of a time sequence.
P.S. A suggestion to improve posting links:
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