Table 2. Average number of tokens collected at the group level for each round and treatment. The standard deviation is given in parentheses.


  Treatment
Round T1 T2 T3 T4
Round 1 972.75
(100.76)
336.00
(47.94)
810.67
(134.30)
610.83
(46.40)
Round 2 835.75
(138.81)
274.00
(63.75)
681.33
(20.68)
453.5
(80.06)
Round 3 1057.75
(22.20)
423.00
(65.92)
853.33
(163.42)
677.33
(55.79)
Round 4 1070.25
(23.37)
468.00
(34.27)
427.5
(96.98)
678.67
(77.06)
Round 5 1137.75
(50.11)
482.33
(26.42)
417.5
(69.50)
696.17
(81.07)