Laughingthrushes are usually included in the Timaliidae (Babblers) but Fregin et. al (2012) split the Babblers into five families in which the Laughingthrushes are in their own family, the Leiothrichidae. This is the taxonomy followed by the Thailand list and by Clements. However, a recent paper by Moyle et al. (2012) splits the Babblers into only three families. Under this scheme the Laughingthrushes become a subfamily (Leiothrichinae) of the Timaliidae rather than a separate family.
References
Fregin S, M Haase, U Olsson & P Alström. 2012. New insights into family relationships within the avian superfamily Sylvioidea (Passeriformes) based on seven molecular markers. BMC Evol. Biol. 12:157.
Moyle, R.G., M.J. Andersen, C.H. Oliveros, F.D. Steinheimer, and S. Reddy. 2012. Phylogeny and biogeography of the core Babblers (Aves: Timaliidae). Syst. Biol. 61: 631-651.
Canon S3 IS