Abstract
The reliability by the test-retest examination of the cognitive test items that have been used in the Yakumo Study was examined using 40-55 years old community dwellers. These participants’ performances can be regarded that the possible influence of cognitive decline due to aging can be ignored. As a result of the test-retest examination, reliability of the subjects who participated in the Yakumo Study health examination for successive consecutive years during the 40-55 years old were as follows; D-CAT1 and D-CAT3, Stroop (dot) and troop (letter) showed a high correlation of 0.75 or more. The logical memory test had a correlation of less than 0.6, the letter fluency test had a correlation of 0.6 or more, but the semantic fluency test had a correlation of 0.4 or less. From these results, it was clarified that the D-CAT and Stroop tests are reliable measures for examining the intra-individual fluctuation of frontal lobe executive function with aging.
