We believe that cognitively modeled robotic systems will be easier to use. Just as humans communicate with one another, facilitated by shared systems (linguistic, social, and cognitive), human-robot interaction can be similarly facilitated. Without cognitive capabilities, communication between a human and a robot is more difficult and it is perhaps subject to failure. Therefore, we have been involved in designing and implementing a cognitively modeled human-robot interface. Based on a pilot study of our interface, we discuss the importance of human subject studies needed to verify the various claims of a robotics interface that purports to be cognitively modeled.