Multisensory illusion effect is a manifestation of multisensory integration. Studies of multisensory
illusion effect in old adults provide evidence for the changes of multisensory integration during the aging
process. This article provided a brief review of the existing research results of multisensory illusion effect in old
adults, including three parts: (1) The visual illusion effect, referring to the McGurk effect, is influenced by visual
information in the multisensory integration process. Old adults have a larger amount of visual illusion effect,
which may reflect a greater multisensory integration. (2) The auditory illusion effect, referring to the soundinduced flash illusion, is an auditory dominance effect. Old adults are more susceptible to the sound-induced
flash illusion than young adults, which is associated with an increase in the width of multisensory temporal
binding window. (3) Audiovisual bounce effect is an audiovisual illusion effect in the two dimensional space,
and it reflects the interaction between attentional and multisensory integration in old adults. Future research
should take top-down cognitive factors (e.g. attention, expectation and emotional state) into consideration,
and take better control of the experimental stimulus as well as realize further standardization, so as to draw a
generalization conclusion of multisensory illusion effect in old adults.