Backster's "Primary Perception" theory was a subject of the Discovery Channel television show "MythBusters". After all human and environmental stimuli that could alter the results were removed, the Mythbusters team reproduced Backster's experiments with the dracaena plant, yoghurt, saliva and eggs. They performed some of these experiments using a model of polygraph machine identical to the one used by Backster in his original research, while other experiments were performed with an EEG instrument, which is based on a different technology than the polygraph. The team tested with the EEG by connecting it to a plant to check whether it would "see" eggs being catapulted randomly into boiling water. The EEG instrument registered no change in the plant and the myth was considered as "busted" in that particular segment of the episode. However, in other experiments done during the same episode where the team employed the same model of polygraph machine used by Backster, these showed positive results with the plant reacting both to actual harm, as well as thoughts of harm. The differences between the two