ODORS AND THE REMEMBRANCE OF THINGS PAST

Three experiments, using ambient odors and incidental learning procedures, examined the effectiveness of odors as memory retrieval cues. Experiment 1 showed that a single ambient odor present on both learning and testing improved recall of a list of words over a no-odor control and a group that received the odor at encoding or retrieval only. Experiment 2 replicated this result and showed that whereas reinstating the odor context improved overall recall, recall of odor-related information was not significantly enhanced by the odor cue. Finally, Experiment 3, employing implicit and explicit retrieval tasks, demonstrated that the same odor must be present on both learning and remembering for the memory benefit to occur. The memory enhancement observed with odors was not due to the effects of semantic mediation. The results are discussed within the framework of encoding specificity of memory (e.g., Tulving & Thomson, 1973), and implications for odor imagery and cuing effects on odor-related material are addressed.