2.6. Memory Function Assessments
verbal and visual memory
We assessed verbal and visual memory tests in Cognitrax, a computerized cognitive function test based on an assessment developed by CNS Vital Signs, Inc. (Morrisville, NC, USA) [Verbal memory: First, the participants learned 15 words. Immediately after that, from the 30 words (15 learned and 15 unlearned words) that were randomly presented, participants recognized the words that were previously learned. After 30 min or more, again, from the 30 words (15 learned and 15 unlearned words) that were randomly presented, participants recognized the words learned previously. The number of correct responses to 60 trials, including immediate and delayed recognition, was calculated as a verbal memory score.Visual memory: First, participants learned 15 meaningless visual images. Immediately after that, from the 30 images (15 learned and 15 unlearned images) that were randomly presented, participants recognized the images that were previously learned. After 30 min or more, again, from the 30 images (15 learned and 15 unlearned images) that were randomly presented, participants recognized previously learned images. The number of correct responses to 60 trials, including immediate and delayed recognition, was calculated as a visual memory score.