Correct structuring of random effects?


I have produced a mixed effects model as follows;


each pairing contains 2 subjects and each Subject is in 2 different pairings with different subjects. Have I structured the random effects in the correct way to control for the non-independence of TotalPayoff between data from the same subjects as well as between data from the same different subjects in the same pairing? (If one subject in a pairing has a high Total payoff the other will too).

Thanks Jonathan