Several recent studies reported that simulator motion did not benefit subsequent flight performance. Other studies have reported various effects of motion upon pilot performance in simulators. These possibly contradictory findings are examined in the light of recent distinctions made between maneuver and disturbance motion. The studies in which simulator motion did not benefit transfer predominantly employed maneuver motion cues, whereas the other group of studies incorporated more disturbance motion cues. Pilot reactions to simulator motion also were examined in terms of maneuver vs. disturbance motion, and it was noted that judgments of the training value of simulator motion were related to the maneuver-disturbance distinction. It is concluded that maneuver motion may be of little potential training value, under many circumstances, and data necessary to an adequate simulation of disturbance motion may not be available. An analysis of the training requirements associated with disturbance motion is needed.