Baddeley and Hitch 's 1974 Model consists of three components ; one main component the phonological loop and the visuospatial sketchpad .
One main component is the central executive and two sub components .
Baddeley and Hitch 's 1974 Model consists of three components ; one main component , the central executive and two sub components , the phonological loop and the visuospatial sketchpad .