 A challenge for an objective science of consciousness is to dissect an essentially subjective phenomenon. As investigators cannot experience another subject’s conscious states, they rely on the subject’s observable behavior to track consciousness. Priority is given to a subject’s introspective reports as these express the subject’s take on her experience. Introspection thus provides a fundamental way, perhaps the fundamental way, to track consciousness. That said, consciousness pervasively influences human behavior, so other forms of behavior beyond introspective reports provide a window on consciousness. How to leverage disparate behavioral evidence is a central issue. 