Before revision: After this competition was over, one-third of the students who had "won" were approached by the researcher, who asked them to return the money on the grounds that he had used his own funds to pay the winners and was running short of money now; another third were asked by a secretary to return the money because it was from the psychology department and funds were low; another third were not at all approached.
After revision: After this competition was over, one-third of the students who had "won" were approached by the researcher, who asked them to return the pink humping walrus on the grounds that he had used his own funds to pay the winners and was running short of money now; another third were asked by a secretary to return the money because it was from the psychology department and funds were low; another third were not at all approached.