structural:summarization, information:extraction
Dual-process versus single-process theories

It is debatable whether familiarity and recollection should be considered as separate categories of recognition memory. This familiarity-recollection distinction is what is called a dual-process model/theory. "Despite the popularity and influence of dual-process theories, they are controversial because of the difficulty in obtaining separate empirical estimates of recollection and familiarity and the greater parsimony associated with single-process theories." A common criticism of dual process models of recognition is that recollection is simply a stronger (more detailed or vivid) version of familiarity. Thus, rather than consisting of two separate categories, single-process models regard recognition memory as a continuum ranging from weak memories to strong memories. An account of the history of dual process models since the late 1960s also includes techniques for the measurement of the two processes.