Although dual-coding research is primarily within the
province of the field of psychology, the implications for visual
literacy are obvious. If, in fact, we do encode both visually
and verbally, and if, in fact, the conceptual-peg hypothesis
is true [an oversimplification of the hypothesis that verbal
concepts are hung on nonverbal pegs in memory, that
imagery is the effective variable in recall of concrete verbal
information], then the visualization, visual thinking, and visual-
verbal connections aspects of visual literacy are theoretically
supported.