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An area of increasing interest amongst teachers and researchers is the availability of tools for the design and implementation of literacy interventions with Spanish speaking children. The present systematic literature review contributes to this need by summarizing available findings on evidence-based literacy interventions (EBI) for children from first to third year of primary school. Our results are based on 20 EBI that aimed at improving at least one of the critical components mentioned by the NRP (2000): phonological awareness, phonics, fluency, vocabulary and comprehension. As 90% of the studies were completed with English-speaking children, we critically discussed the applicability of this evidence to the specific context of Spanish-speaking countries. Although many of the general characteristics of the EBI completed with English speaking children could also guide interventions in Spanish, it remains crucial to take into account structural differences between the orthographies of both languages. Moreover, we identified transversal strategies and implementation techniques that due to their universal character could also be useful for early literacy interventions in Spanish. (c) 2018 Fundacion Universitaria Konrad Lorenz. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).
La prevalencia del retraso lector (RL) refleja datos controvertidos, que varían desde el 3.1–3.2% al 17.5%. Posibles explicaciones se basan en parte en la incidencia de factores específicos de cada ortografía en el proceso de lectura, pero por otra parte en diferencias metodológicas, que dificultan la comparación de los resultados informados. Por lo tanto, el presente estudio propone analizar la prevalencia del RL en una misma muestra de 1,408 escolares hispanoparlantes, comparando diversas formas de calcular el índice de prevalencia. Los resultados reflejan una prevalencia del 2.2–5.3%, consistente con los datos informados para ortografías predominantemente superficiales. Algunos de los procedimientos empleados para identificar el RL resultan más precisos en los cursos escolares iniciales, que en momentos más avanzados de la escolaridad. A su vez la consideración del sexo de los alumnos a la hora de calcular la prevalencia, parecería representar una medida más sensible para identificar a alumnos con RL.