The current study sought to extend the work of Stewart et al. (2002) by investigating the effects of differing histories with regard to colour on participant’s equivalence test performances. Thirty-two university students were divided into four groups exposed to different training procedures but all were subsequently exposed to an identical equivalence test using coloured stimuli (either red or green). Initially, participants were divided into two groups, one receiving training with stimuli coloured either red or green (the All Colour group), while the other received training with stimuli coloured only black (Colour Test group). In addition, half of the participants in both groups were exposed to exemplar training procedures (Exemplar Training Groups), with the remaining participants simply receiving repeated test exposures (Repeat Groups). Results showed that participants in the All Colour groups produced higher equivalence responding relative to participants in Colour Test groups. Exemplar training was shown to be effective in promoting equivalence responding only for participants in the All Colour groups.