Previous research shows that integration of the senses is interchangeably dependent by  temporal neural mechanisms. One unsolved problem is how sensory timing differences in the brain is processed. In this systematic review (K = 18), audio-visual behavioral task paradigms are investigated with a focus on temporal binding window estimates. The results showed among other things that temporal integration is an adaptive neural process and that temporal acuity increases with age. Measurements between studies were sometimes incompatible which limited conclusions. Future studies should focus on standardizing operational parameters and compare within and between group designs.