Abstract: An arrangement for achieving reliable communication of perceived attitude information from the test subject in an environmentally controlled spatial disorientation study. The communications system includes a talking with the hand protocol wherein the orientation of the test subject's opened hand is sensed upon command from test monitoring persons. Orientation of the test subject's hand is remotely sensed by way of a three-axis of rotational freedom transducer apparatus in which the test subject's hand is suspended in a manner providing minimal orientation feedback to the test subject. Use of the described system includes a selection of additional physiological influencing environmental inputs for the test subject including visual and audible stimulus information.