This study investigates sensory weighting under expected pain or threat induced by noxious cold-water immersion using a randomised controlled trial design. Healthy, pain-free participants will be recruited under the impression they are participating in a study examining responses to cold water immersion. They will be randomised to one of two groups. One group of participants will be led to believe their hand will be placed in a bucket of noxiously cold water and another group will be lead to bel