The research described in this paper was carried out to determine the effects of olfactory stimuli (provided by natural essence oils of lemon) on achievement in English of fourth grade pupils in a school in Turkey. Pupils were randomly assigned to an experimental group (n:29) or a control group (n:29). Both groups were taught English lessons twice a week for a period of four weeks as part of the normal curriculum. In the experimental group, lessons were provided in an aromatic atmosphere. In the control group, lessons were provided in a normal classroom environment. Following treatment, the experimental group outperformed the control group on an achievement test in English. A month after the termination of treatment, the performance of both groups on the achievement test had deteriorated, but the experimental group still outperformed the control group.
Irish Journal of Education , vol 36, 2005