Attitude embodiment effects occur when the position or movement of a person's physical body changes the way the person evaluates an object. The present research investigated whether attitude embodiment effects depend more on biomechanical factors or on inferential cues to causal agency. Experiments 1 and 2 showed that actual movements of the physical body are not necessary to create attitude embodiment effects when inferential cues imply agency for another person's physical movements. Experiment 3 showed that actual movements of the physical body are not sufficient to create attitude embodiment effects when inferential cues imply nonagency for those movements. In all 3 experiments, inferential cues to agency played a more important role in attitude embodiment effects than did actual agency, suggesting that theories of embodiment and attitude embodiment need to consider inferential cues to agency alongside biomechanical mechanisms.