Students were tested with a WM battery for children the WMTB-C (Pickering & Gathercole, 2001) which assesses the three WM components (the Central Executive, the Phonological Loop and the Visuospatial Sketchpad).
In this sense, we were able to replicate the WMTB-C's (Pickering & Gathercole, 2001) original three-factor structure with a sample of Portuguese 8 to 9 year-old students.
On the other hand, according to Miyake and colleagues (2001), the close relationship between the Visuospatial Sketchpad and the Central Executive tasks should be associated to the fact that all visuospatial tasks of the WMTB-C would be less automatic and highly dependent on the Central Executive when little information is provided.
The WMTB-C was used as the design of the present study which was developed on the basis of the multicomponent WM model of Baddeley & Hitch (1974).
Considering the visuospatial tasks of the WMTB-C, we suggest a new approach to the construct validity of the WMTB-C battery.