Bugelski, B. R. (1968). Images as a mediator in one-trial paired-associate learning. Journal of Experimental Psychology, 77(2), 328-334.

College student Ss learned 6 successive lists of 10 words in numerical order using a mnemonic system designed to employ imagery as a mediational device. Experimental Ss learned the lists better and remembered significantly more of the associations after all lists had been learned than did control Ss. Experimental Ss reported use of strong imagery with characteristics of color, size, direction, possession, etc. Experimental Ss showed little evidence of interference ; control Ss showed a significant pattern of rises and falls in their learning suggesting a strong interference effect.