Step.2

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Note: it doesn't really matter which end you wrap with, but one advantage of doing it this way is that you can measure out how much of the "bight" end is left over. This helps leave you with a knot with a loop later that is just the right size. This extra bit of careful tying doesn't make a whit of difference with this basic tie, but when you build more complex ones from this ... it will.
Have your subject place their wrists together, and start wrapping with the working end of the rope. The looped end here is in the left hand, and the working end in the right.