This document describes a study that measured physiological fear response and presence in virtual environments using different levels of immersion and sensory fidelity. Sixteen participants underwent tasks in a virtual reality church and forest across conditions using an Oculus Rift and monitor. Questionnaires and heart rate sensors captured subjective presence and objective fear response. Results found highest fear and presence in the Oculus Rift condition, confirming the hypothesis that objective measures match subjective questionnaires. Immersion level affected physiological response.