-One limitation of the memory conformity explanation: evidence that PED actually alters EWT. Shagerberg & Wright showed their participants film clips. There were two versions; a muggers hair was dark brown in one and light brown in another. Participants discussed the clips in pairs, each having seen the other version. They didn't report what they'd seen or what they heard from the co-witnesses but a blend of the two - medium brown hair. This suggests memory itself is distorted through contamination by misleading PED, rather than the result of memory conformity.