Word Processing Is Faster than Picture Processing in Alzheimer’s Disease

Figure 1

Comparison of the performances of the two groups. AD = Alzheimer’s disease; HC = healthy control. , post hoc test. The -axis represents the average number of correct answers with SD. According to the two-way ANOVA with time as the repeated measure and with age and education as covariables, there was a significant group effect (, ) and a presentation time effect (, ), with a significant interaction (, ). There was a significant effect on the covariate for age (, ), but not for education (, ). A post hoc -test showed that the AD group had a significantly lower score than the HC group in presentation time for both 20 ms (, ) and 300 ms (, ). A post hoc -test in the AD group showed that the presentation time for 20 ms has a significantly lower score than that for 300 ms (, ).