@inproceedings{e5fbde729a0c47ba82771924aaa31f10,
title = "Thin slices of head movements during problem solving reveal level of difficulty",
author = "B. Joosten and \{van Amelsvoort\}, M.A.A. and E.J. Krahmer and E.O. Postma",
year = "2011",
language = "English",
isbn = "9789175010809",
pages = "85--88",
editor = "G. Salvi and J. Beskow and O. Engwall and \{Al Moubayed\}, S.",
booktitle = "Proceedings of the international conference on audio-vidual speech processing (AVSP 2011)",
publisher = "KTH Royal Institute of Technology",
}