COST Action IS0804, Language Impairment in a Multilingual Society: Linguistic Patterns and the Road to Assessment, had a major impact on the study of language assessment among second language learners. It's bi-annual  meetings where a key in the ability to advance the research activities of the network. Information about these meetings is available below.
Kick-off Meeting
June 8-9, 2009
COST Office, Brussels, Belgium
Local Organizer: COST Office
First MC & WGs Meeting
November 16-18, 2009
University of Amsterdam, Amsterdam, The Netherlands
Local Organizer: Jan de Jong
Second MC & WGs Meeting
May 26-28, 2010
University of Newcastle,
Newcastle, UK
Local Organizer: Carolyn Letts
Third MC & WGs Meeting
October 27-29, 2010
Flamingo Beach Hotel,
Larnaca, Cyprus
Local Organizer: Kleanthes K. Grohmann
Fourth MC & WGs Meeting
May 25-27, 2011
Anadolu University,
Eskişehir, Turkey
Local Organizer: S. Seyhun Topbaş
Fifth MC & WGs Meeting
November 28-30, 2011
San Antonio Hotel and Spa,
St Paul’s Bay, Malta
Local Organizer: Daniela Gatt
Sixth MC & WGs Meeting
May 14-16, 2012
Berlin-Brandenburg Academy of Sciences and Humanities and ZAS/Centre for General Linguistics 
Local Organizer: Natalia Gagarina
July 9-13, 2012
De Baak, Driebergen,
near Utrecht, The Netherlands
Local Organizer: LOT Summer School 
July 16-27, 2012
Bangor University,
North Wales (UK)
Seventh MC & WGs Meeting
September 19-21, 2012
Padova, Italy
Local Organizer: Chiara Levorato
Eighth MC & WGs Meeting
February 13-15, 2013
Lisbon, Portugal
Local Organizer: Fernanda Pratas, João Costa, and Maria Lobo
The Final Conference
May 27-29, 2013
Kraków, Poland