The measures examined were Verbal Fluency; abbreviated Boston Naming; constructional praxis; and Word List Learning, Recall, and Recognition.
The individual tests are: verbal fluency, Boston Naming Test, MMSE, word list and constructional praxis.
The second factor included constructional praxis, delayed recall, temporal orientation, attention/concentration and spatial orientation.
Constructional praxis seems to represent the visual component of WM, thus playing an important role in WM [ 18].
The third factor was related to complex tasks: constructional praxis, reading a sentence, attention/concentration and verbal comprehension.
The third factor explained the 3.19% of variance and included constructional praxis, reading a sentence and attention/concentration.
The third factor explained 3.2% of the variance and included constructional praxis, reading a sentence, attention/concentration and verbal comprehension.
The first factor included attention/concentration, language and constructional praxis and the second comprised time-space orientation and delayed recall.
In the severe dementia group failure was most likely to be observed in, immediate memory, verbal comprehension, reading a sentence, and constructional praxis items.
In the confirmatory IRT model, only the 'Draw a cube' subitem within the 'Constructional Praxis' item was allowed to have a non-zero lower asymptote.
Equation (12) is named as limited volume constraint because it reflects the limitation of volume of constructional material in practice.
