Before revision: Koole, Dijksterhuis and van Knippenberg investigated this by asking Dutch students to rate each letter of the alphabet, together with some filler questions for distraction, twice within a four-week period.
After revision: Koole, Dijksterhuis and Van Knippenberg investigated this by asking Dutch students to rate each letter of the alphabet, together with some filler questions for distraction, twice within a four-week period.