Convergence, i.e. the process of two people adjusting their behaviour to become more similar to each other, has been found in most aspects of human interaction by now. However, most of the studies investigating convergence have so far considered mostly linguistic aspects while taking into account only production or perception rather than both. In this paper, we expand on previous work to examine paralinguistic phenomena, namely laughter, by integrating an analysis of differences between several acoustic cues extracted from laughter in spontaneous interaction with a perceptual experiment in order to determine their perceptual relevance.