Education Research Current Organisation and Cooperation NL
Login as
Prospective student Student Employee
Bachelor Master VU for Professionals
Exchange programme VU Graduate Winter School Honours programme VU-NT2 Semester in Amsterdam
PhD at VU Amsterdam Research highlights Prizes and distinctions
Research institutes Our scientists Research Impact Support Portal Creating impact
News Events calendar Energy in transition
Israël and Palestinian regions Women at the top Culture on campus
Practical matters Mission and core values Entrepreneurship on VU Campus
Organisation Partnerships Alumni University Library Working at VU Amsterdam
Sorry! De informatie die je zoekt, is enkel beschikbaar in het Engels.
This programme is saved in My Study Choice.
Something went wrong with processing the request.
Something went wrong with processing the request.

New study reveals the unique nature of tickling-induced laughter

20 November 2024
Laughter, a universal human expression, takes many forms - whether it's a chuckle, a giggle, or a full-blown guffaw. But not all laughter is created equal. New research led by social psychologist Roza Kamiloglu at VU Amsterdam reveals that laughter induced by tickling stands apart from other forms of laughter, both acoustically and perceptually.

Published in Royal Society’s Biology Letters, the study combines machine learning and listener experiments to uncover the distinct characteristics of tickling-induced laughter and its evolutionary roots.

Roza Kamiloglu scoured with her colleagues YouTube for videos capturing authentic, spontaneous laughter and compiled a dataset of 887 laughs from real-life scenarios. These videos were carefully selected to ensure they featured clear, unposed laughter and were categorized into four distinct eliciting contexts: tickling, humorous stimuli (such as comedy sketches or funny movies), witnessing someone’s misfortune, and verbal jokes. To maintain the integrity of the dataset, each video had to meet strict inclusion criteria, ensuring the laughter was genuine, unambiguous in its context, and produced by a single individual.

The researchers employed machine learning techniques to identify systematic acoustic differences between the laughter types. The system accurately classified laughter as tickling-induced in 62.5% of cases, while its performance for distinguishing other types of laughter hovered only slightly above chance. Listener experiments further validated these findings: in one study, participants were asked to identify whether laughs originated from tickling or other contexts, achieving significantly above-chance accuracy. In another study, participants rated laughter clips on perceptual dimensions like arousal, positivity, and vocal control, revealing that tickling-induced laughter was consistently perceived as more arousing and less controlled than other types.

Kamiloglu explains, “This type of laughter likely originated over ten million years ago, rooted in the social play behaviors of our common ancestors with the primates. Just like chimpanzees who chuckle during playful wrestling matches, or dogs who pant excitedly during a game of chase, this laughter is a spontaneous burst of joy, deeply ingrained in our biology." Its distinct acoustic features reflect an automatic, less controlled response, setting it apart from laughter triggered by more cognitively complex stimuli.”

The findings reveal how tickling-induced laughter, a deeply ingrained biological response, provides a fascinating glimpse into the evolutionary origins of human vocal expressions.  Even individuals who have never heard a laugh, such as those born profoundly deaf, exhibit remarkably similar laughter patterns, highlighting the innate nature of this response. By highlighting its unique role in playful interactions, the study underscores laughter's enduring significance in social bonding across species and time.

Contact the VU Press Office

Quick links

Homepage Culture on campus VU Sports Centre Dashboard

Study

Academic calendar Study guide Timetable Canvas

Featured

VUfonds VU Magazine Ad Valvas

About VU

Contact us Working at VU Amsterdam Faculties Divisions
Privacy Disclaimer Veiligheid Webcolofon Cookies Webarchief

Copyright © 2024 - Vrije Universiteit Amsterdam