Under the full data model (no adjustment for passing the comprehension check), we found that participants adjusted their contributions to match the norms (F (2, 265) = 4.711, *p* < .01.
Post-hoc testing (LSD) revealed that participants who were told the norm was high gave more ((37.689, SD = 15.442) than if they hadn't been told anything (32.689, SD = 17.659) or wee told the norm was low (29.824, SD = 17.496; both *p*s < .049). Participants told the norm was low differed from if they were told the norm was high (*p* < .002) but not if they hadn't been told anything (*p* > .257).
There was no effect of the speed manipulation nor the interaction of speed with norms (both *p*s > .903). None of these results substantively changed after controlling for level of greed.