This document discusses several theories and models of memory including: - The multi-store model which proposes that memory involves sensory, short-term and long-term components. - The levels-of-processing model which suggests deeper semantic processing leads to better long-term memory than shallow structural processing. - Baddeley's multi-component model of working memory which includes the phonological loop, visuospatial sketchpad and central executive. - Broadbent's filter theory of selective attention where the brain filters stimuli based on physical characteristics. - Treisman's feature-integration theory where basic features are processed automatically before being integrated into whole objects.