and parahippocampal cortex activation was greater when scenes were recalled. The results provide evidence of distinct encoding activation in the subregions of the medial temporal lobe. The first subregion is the perirhinal cortex, which encodes item information. The second subregion, the parahippocampal cortex, is involved in source information. The evidence provides support for the role of the right perirhinal cortex in attributing an object to the right source. As decreased activation was associated with poorer performance, decreased activation of the right perirhinal cortex could be a possible mechanism for source confusion. Experimental research Misattribution In one of the earliest studies involving misattribution, the Canadian cognitive psychologist Bruce Whittlesea presented subjects with a list of common words. Each word was briefly displayed to the subject. The task required the subject to judge whether a target word was semantically related to any word in the list. Unlike Whittlesea's first experiment involving the recognition of target words, this study involved the manipulation of processing fluency through the conceptual context of the target word, rather than the physical context. After the subjects were given a brief moment to study the list of words, the subjects were presented with sentences that would contain a word that was capitalized at the end of the sentence that would have either been, or not been, from the previously presented list. The word at the end of the sentence was either highly predictable given the context of the sentence, for example: "The stormy seas tossed the BOAT", or the end word was less predictable such as: "She saved her money and bought a LAMP". The subjects were then required to state whether the capitalized end word had appeared, or not, on the previous list of words. If not, they were to respond by saying that the word was "new" versus it being "old". The study revealed that the new words that were highly predictable were more likely to be incorrectly identified as being previously seen, whereas the new words that were less predictable were not so identified. In fact, subjects actually named predictable words faster than they did unpredictable words. Whittlesea was able to conclude from this study that subjects misattributed their fast responses for highly predictable words as an indication that they had previously experienced the word whereas in fact that was incorrect. As a result, the fluency of processing caused the subjects to misinterpret their quickness as