Esta tesis doctoral pretende aportar nuevos datos sobre los efectos del enfoque AICLE (Aprendizaje Integrado de Contenido y Lengua Extranjera) en las habilidades productivas y receptivas de los alumnos de una escuela privada de Barcelona (Catalunya). Se trata de una comunidad bilingüe en la que las lenguas oficiales son el catalán y el español y en la que el inglés representa la tercera lengua del curriculum. Con este objetivo, se analizan longitudinalmente 100 alumnos bilingües catalán / español de edades comprendidas entre 12 y 15 a lo largo de dos años académicos en dos contextos de exposición diferentes: EFL (inglés sólo como asignatura de lengua extranjera, n=50, grupo de control) y AICLE (inglés como medio de instrucción cuando estudian ciencias naturales, n=50, grupo experimental). Se extraen datos a partir de las habilidades productivas y receptivas y se analizan de forma cuantitativa y cualitativa utilizando un diseño posttest al final de cada curso académico. Los resultados demuestran la efectividad del enfoque AICLE aunque no de forma generalizada en todas las habilidades. A diferencia de investigaciones anteriores, es importante destacar la mejora de la corrección dentro de la producción escrita y de las habilidades léxico-gramaticales. Finalmente, los resultados tienden a confirmar que el factor edad es relevante y que obtienen mejores resultados los sujetos mayores. / The present study seeks to contribute new evidence on the effects of the CLIL approach (Content and Language Integrated Learning) on the learners’ productive and receptive skills in a private school in Barcelona (Catalonia). This is a bilingual community in which both Catalan and Spanish are official languages and where English represents the third language included in the currículum. For that purpose, 100 bilingual Catalan / Spanish students aged 12 to 15 are analysed longitudinally over two academic years in two different types of exposure contexts: EFL (English only as a foreign language school subject, n=50, control group) and CLIL (English as medium of instruction when learning Science, n=50, experimental group). Data are elicited both for productive and comprehension skills and are analysed quantitatively and qualitatively using a posttest design at the end of each academic year. The results show the effectiveness of the CLIL approach, however not in all skills. In contrast with findings published in previous studies, the subjects’ writing and particularly so accuracy, significatively progressed and so did lexico-grammatical abilities.Results also tend to confirm that age had an impact and thus the older, the better.

This study examines the influence of formal L2 English instruction (FEI) onpronunciation accuracy of similar and new vowels in the framework of Flege’s SpeechLearning Model (Flege, 1995a, 1999, 2002), focusing on selected segmentalpronunciation features produced by native German speakers. A spectral vowelproduction experiment was carried out with 24 German students who attend sixth, ninthand twelfth grade of a south German secondary school by the time this study wasconducted. Spectral characteristics of the similar vowel /ɛ/ and the new vowel /æ/,produced by each subject of the three groups (G6, G9, and G12), were compared tovowel data of native English speakers. In order to test the influence of formalinstruction on selected phonetic segments, which are known to cause difficulties fornative German learners of English, three native English listeners judged on a three pointscale the intelligibility of the segments produced. The results of the vowel experimentshowed significant influence of FEI on pronunciation accuracy of some characteristicsof the similar vowel /ɛ/ but not of the new vowel /æ/. The listener rating experimentshowed that FEI had on average no influence on pronunciation accuracy of the three L2English learner groups.

This study examines the influence of formal L2 English instruction (FEI) on pronunciation accuracy of similar and new vowels in the framework of Flege’s Speech Learning Model (Flege, 1995a, 1999, 2002), focusing on selected segmental pronunciation features produced by native German speakers. A spectral vowel production experiment was carried out with 24 German students who attend sixth, ninth and twelfth grade of a south German secondary school by the time this study was conducted. Spectral characteristics of the similar vowel /ɛ/ and the new vowel /æ/,produced by each subject of the three groups (G6, G9, and G12), were compared to vowel data of native English speakers. In order to test the influence of formal instruction on selected phonetic segments, which are known to cause difficulties for native German learners of English, three native English listeners judged on a three pointscale the intelligibility of the segments produced. The results of the vowel experiment showed significant influence of FEI on pronunciation accuracy of some characteristics of the similar vowel /ɛ/ but not of the new vowel /æ/. The listener rating experiment showed that FEI had on average no influence on pronunciation accuracy of the three L2 English learner groups.

Esta investigación se enmarca dentro del campo de la enseñanza-aprendizaje de segundas lenguas, concretamente, dentro del ámbito de la enseñanza del español como segunda lengua. El marco teórico en el que se inscribe es el que aporta la teoría sociocultural y la metodología de investigación utilizada proviene del paradigma interpretativo (cualitativo). En síntesis, este trabajo ha consistido en el estudio de los procesos de construcción y gestión del conocimiento explícito durante la instrucción formal de la lengua objeto de estudio, en dos grupos multilingües de nivel principiante de una escuela oficial de idiomas, sin lengua vehicular común a todos los aprendientes. Hemos analizado y hemos descrito el tipo de comunicación que se genera entre profesor y aprendiente en la clase de español/ L2, entendiendo por comunicación tanto la verbal como la no verbal (kinésica y proxémica), y hemos comparado las percepciones que tanto profesores como aprendientes tienen de todo este proceso / This research is framed in the second language acquisition field, specifically, in the studies of Spanish as a second language. The theoretical framework in which this research is included is the one that provides with the sociocultural tradition and the methodology used for comes from the interpretative (qualitative) paradigm. In summary, this research work consisted in the study of how is constructed and negotiated explicit knowledge during the formal instruction of the language studied in class, in two multilingual groups of beginners without a common vehicular language to all the learners. We studied and we described the way of communication that is generated among teacher and students during Spanish formal instruction, understanding the communication concept both verbal and non-verbal communication, and we compared the perceptions that teachers and students have about all this process