Shino Mori, MD, Aiko Osawa, MD, PhD, Shinichiro Maeshima, MD, PhD, Kenichi Ozaki, MD, PhD, Takashi Sakurai, MD, PhD, Izumi Kondo, MD, PhD,
Eiichi Saito, MD, PhD
Jpn J Compr Rehabil Sci 5: 102-108, 2014
Objective: Various scoring methods for the Cube-Copying Test (CCT) have been assessed for their
validity, but few have been examined for reliability.
Additionally, a comparison of multiple scoring
methods applied to an identical group of patients has
not been reported to date. The present study examined
both the reliability and validity of multiple scoring
methods and their role in the evaluation of spatial
cognitive function.
Method: Thirty-three patients who visited the Medical
Center for Dementia at our hospital were included in
the study. The Cube-Copying Test was independently
scored by two raters using two different scoring
methods.
Results: Both scoring methods showed significant
inter- and intra-rater reliability. The assessment
of criterion-related validity showed a significant
correlation with Ravenfs Colored Progressive Matrices
and Frontal Assessment Battery, demonstrating that
the CCT reflects visual cognitive functioning and
executive functioning. The CCT also showed a
significant correlation with education years, suggesting
that the CCT scores are more affected by years of
education than by age or duration of illness.
Key words: Cube-Copying Test, dementia, reliability, validity