| 2012 |
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Methodological Issues and the Replicability of Variation Studies. New Ways of Analyzing Variation 41 (NWAV 41), Indiana University, Bloomington, IN. |
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| 2011 |
Sample Size Planning in Sociolinguistic Research: How many subjects? How many tokens? Which Statistical Analysis? New Ways of Analyzing Variation 40 (NWAV 40), Georgetown University, Washington, DC. (Workshop) |
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| 2010 |
Formal instruction and language contact in Language variation: The case of ser and estar + adjective in the Spanishes of Limón, Costa Rica: Hispanic Linguistics Symposium 2010. Indiana University, Bloomington (10/20). |
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| 2009 |
How many speakers? How many tokens?: A methodological contribution to the study of variation. New Ways of Analyzing Variation 38 (NWAV 38), University of Ottawa, Ottawa, Canada. |
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| 2009 |
(with Deyanira Cubillo, Mairene Durán and Daniel E. Josephy) Por una política educativa fundamentada en la ciencia: el caso de inglés en Costa Rica. [For a scientifically founded educational policy: the case of English in Costa Rica]. 2do Congreso Intercional en Linguistica Aplicada (CILAP) 2009, Universidad Nacional, Heredia, Costa Rica. |