Theory - Human memory has fascinated philosophers and thinkers for hundreds of years.

... Following an earlier research by Craik and Tulving ( 1975), an experiment was designed to explore the "levels of processing" framework for human memory. It was hypothesised that the durability of the memory trace would be a positive function of the "depth" of processing, where depth referred to "greater degrees of semantic involvement"(Craik and Tulving, 1975). Twenty eight subjects were induced to process words to different depths: shallow encodings were achieved by asking questions about a word's typescript, while deep encodings were induced by asking whether a word would fit into a given category. Deeper encodings were found to be associated with higher levels of performance on the subsequent memory test than shallow ones. This result was tested using Student's unrelated t-test and found to be significant. The experiment's result appears to support Craik and Tulving's theory that retention depends critically on the qualitative nature of the encoding operations. The

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