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In this study, we analyse the nature of clitic "se" and low applicatives in Spanish L2 through the study of the non-native acquisition of this clitic by L1 English adult learners. In particular, we are going to discuss the question of how English adults acquire this clitic in the different syntactic configurations where it appears (anticausative inchoative verbs, inherent reflexive verbs, transitive verbs implying an inalienable possession relation, consumption verbs and non-anticausative inchoative verbs). Our main research hypothesis is that the acquisition of clitic "se" with some types of applicatives takes place in the later stages of the learning process, since it requires exposure to certain linguistic evidence to acquire a certain type of argument structure proper to applicatives. This study is going to be based on how our subjects perform using Grammaticality Judgment Tests (GJTs).

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We present evidence that children have difficulty with the Spanish psych verbs that do not project the subject as the external argument. Our findings support the External Argument Requirement Hypothesis (EARH), according to which children until 5 or more have trouble with base structures that don’t assign a subject/external argument. On the basis of our results, we argue that acquisition of the entire class of psych verbs depends on the acquisition of one linguistic property that allows the L1 grammar to generate structures with no external argument.

Este estudio se realizó en el municipio de San Luis, Antioquia, en una zona de bosques de un área aproximada de 25 kilómetros cuadrados, atravesada por la autopista Medellín-Bogotá, entre los ríos Samaná y Claro. Los objetivos de este trabajo fueron: primero, estudiar los usos de las principales especies arbóreas maderables de importancia económica de San Luis, y segundo, realizar un inventario florístico. Respecto a las maderas se estudiaron27 especies con relación a sus diversos usos en la región. En el inventario florístico se recolectaron 427 especies, que representan 84 familias de Pteridofitas (Selaginelas, Licopodios y Helechos) y Espermatofitas (Angiospermas: Monocotiledóneas y Dicotiledóneas). De las 427 especies, 21 son primer registro para la flora de Colombia, y 10 de las 21 son especies nuevas para la ciencia.