In economics, “willingness to pay” reflects subjective value which has been employed to price goods, and morerecently, negative outcomes. The current project proposes a protocol for the behavioural assessment of fear-related avoidancebased on how much an individual is willing to pay to avoid their fears.The proposed protocol consists of a “card game” interface in which participants make choices in several stages. Duringbaseline, participants chose between two decks that provide differential point rewards. Across a series of experimental blocks,feared stimuli (e.g. a spider image) were presented in addition to rewards when the richer deck was chosen. Rewards were thenmanipulated, in a staircase fashion, to establish the value of the feared stimulus. Mouse and eye movements were tracked inan attempt to track cognitive processes during decision-making and avoidance. Preliminary results indicate sensitivity of theprotocol, and strengths and weaknesses will be discussed.