Abstract
We examined the effect of change acceleration and velocity of the COVID-19 infections on the GOOGLE search number of the word related to COVID-19 considering the lag effect. The result indicated that the change acceleration and velocity of the COVID-19 infections had significant effects on the GOOGLE search number of the word related to COVID-19. The finding suggests that psychological factor such as recognition to the change acceleration and velocity of the COVID-19 infections. The practical implications of the finding will be discussed.