Within-subjects design
During the ”VR with No real water” condition, as participants put their virtual hand into the bowl of computer generated virtual water in virtual reality, their real hand reached into the air in the real world (no tactile feedback, i.e., no real water). In contrast, during the “VR with Yes real water” condition with tactile feedback, when the participant put their virtual hand into the bowl of virtual water in VR, their real hand simultaneously reached into a co-located bowl of real water in the real world (VR + real water). Using an AB/BA within subject crossover design with treatment order randomized, half of the participants received “VR + yes real water” first and VR + no real water” second, and others received the opposite order “VR + No real water ” first and “VR + Yes real water” second. This within-subjects design permitted a comparison of both conditions within the same subject, which made the design statistically more powerfulA detailed description of the stimulus sequence. Participants were randomly assigned to either Treatment Order 1 or Treatment Order 2, with VR treatment order randomized).