Table 2.

Main results from study 2A: Mean performance scores in two-round blocks

ConditionCompetition roleCompetition rewardNRound 1–2Round 3–4Round 5–6
Control8334.06 (10.87) [31.67, 36.43]37.56 (12.92) [34.74, 40.38]**38.28 (13.37) [35.36, 41.20]
TreatmentNoncompetitor$0.511035.78 (10.57) [33.78, 37.78]39.82 (10.37) [37.86, 41.78]**42.03 (11.17) [39.92, 44.14]**,b
$1011134.93 (11.31) [32.80, 37.06]38.84 (12.14) [36.56, 41.13]**41.41 (12.16) [39.13, 43.70]**,c
Competitor$0.512435.13 (11.87) [33.02, 37.24]38.53 (11.97) [36.40, 40.66]**41.88 (11.75) [39.79, 43.97]**,b
$1012935.33 (11.22) [33.37, 37.28]38.20 (12.08) [36.09, 40.30]**42.73 (11.31) [40.76, 44.70]**,a
  • SDs in parentheses; 95% confidence intervals (CIs) in square brackets. Asterisks indicate significant differences between the mean of the current block and the previous block within the same condition/role according to paired t tests (*P < 0.05, **P < 0.01).

  • a, b, cEntry is significantly or marginally significantly different from the corresponding mean in the control condition according to a between-subjects t test (aP = 0.010, bP < 0.05, cP < 0.1).