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Background German children do not formally learn letter-sounds before school entry. In this study, we evaluated kindergarten children's sensitivity to the frequency of letters and visually similar symbols in child-directed texts, how it develops and whether it predicts early reading abilities. Method In a longitudinal study from kindergarten to primary school, children were asked to judge whether a presented alphabetic (e.g., A) or non-alphabetic symbol (e.g., #) was a letter. High and low frequency was varied for both types of symbols. Furthermore, we analysed whether later reading abilities were predicted by this letter judgement ability. Results Before school entry, children had difficulties in distinguishing frequent non-alphabetic symbols from letters. Furthermore, letter judgement in kindergarten predicted reading abilities in first grade. Conclusions Children derive some knowledge about letters from the frequency of co-occurrence of letters and symbols in texts. The ability to distinguish letters from non-alphabetic symbols predicts early reading.

Background In Germany, there is a substantial gap in reading literacy between monolingual children and their L2-speaking peers. Nevertheless, it is still unclear where these performance differences are rooted. Methods We investigated children of grades 5, 6 and 7 with comparable socio-economic status, who completed a battery of tests assessing their linguistic and executive functioning skills as well as their reading performance on the letter, word, sentence and text level. Results Whereas L1 speakers showed better linguistic skills, there was no difference between groups in executive functioning. After controlling for individual differences on each level of reading, groups only differed in text comprehension. This effect, however, disappeared when participants' linguistic skills were additionally controlled. Conclusions In sum, results show that reading problems in L2 speakers cannot be attributed to deficits on specific component processes of reading, but to a lack of linguistic skills, which negatively affects reading comprehension.

Many low-skill readers have problems with visual word recognition. In particular, low-skill readers show a substantial nonword reading deficit that is attributed to deficits in sub-lexical processing. In this study, I examined whether the nonword deficits of German 14-year-old low-skill readers were associated with inefficient use of multi-letter information. In a lexical-decision experiment, words and nonwords were presented in standard format and in MiXeD cAsE format which has been shown to be especially disrupting for sub-lexical processing. When the stimuli were presented in standard format, low-skill readers showed a substantial nonword reading deficit, that is they were generally slower than high-skill readers, but had special problems with decoding nonwords. However, when stimuli were presented in MiXeD cAsE, low- and high-skill readers showed equal impairments in nonword processing. This finding indicates that low-skill readers do not use context-sensitive multi-letter rules during phonological assembly in normal reading.