retrieving payoff variable from subject's side

[Minxi Lin]

Dear Community,

In the subject side of my experiment, I created a payoff matrix game. I would like to retrieve the students’ choice proportions on the global side in order to calculate the expected payoff.

I saved the payoff matrix on the subject side using $save('payoff1', $payoff); and attempted to retrieve it on the global side with $payoff1 = ($getValues("payoff1")); However, $payoff1 appears to be an empty array.

Is there a recommended way or function to correctly retrieve this variable from the global side?

I am new to ClassEx and I’d greatly appreciate any guidance you could provide.

Sincerely,
Minxi

[Marcus Giamattei (classEx Team)]

Hej Minxi,

I guess the problem is with the synchronization of stages. The global program is executed before the subjects program in any stage. So you would need to add a separate stage and then only retrieve the payoff one stage later. Or you retrieve the strategies (which have been already written in the first stage) instead of payoffs.

Best, Marcus