Healthy volunteers aged 18-55 are needed for a study investigating the effects of the mood stabilising treatment lithium on the processing of emotions. If you are interested in participating in the study please contact Lizzie for more information. Unfortunately we are unable to include volunteers with either a current or previous psychiatric or psychological illness, who are taking certain medications or have certain illnesses, who are pregnant or breastfeeding are over or underweight or who suffer from dyslexia. Please do feel free to contact us if you are unsure as to whether or not the study would be suitable for you. The study involves taking the treatment for 11 days. Time and expenses will be reimbursed. Keywords: Work, Charity, Volunteer