This study presents results from a cross-modal priming experiment investigating inflected verb forms of German. A group of late learners of German with Russian as their native language (L1) was compared to a control group of German L1 speakers. The experiment showed different priming patterns for the two participant groups. The L1 German data yielded a stem-priming effect for inflected forms involving regular affixation and a partial priming effect for irregular forms irrespective of stem allomorphy. By contrast, the data from the late bilinguals showed reduced priming effects for both regular and irregular forms. We argue that late learners rely more on lexically stored inflected word forms during word recognition and less on morphological parsing than native speakers.

This study reports developmental changes in morphological encoding across late childhood. We examined event-related brain potentials (ERPs) during the silent production of regularly vs. irregularly inflected verb forms (viz. -t vs. -n participles of German) in groups of eight- to ten-year-olds, eleven- to thirteen-year-olds, and adults. The adult data revealed an enhanced (right-frontal) negativity 300-450 ms after cue onset for the (silent) production of -t relative to -n past participle forms (e.g. geplant vs. gehauen 'planned' vs. 'hit'). For the eleven- to thirteen-year-olds, the same enhanced negativity was found, with a more posterior distribution and a longer duration (=300-550 ms). The eight- to ten-year-olds also showed this negativity, again with a posterior distribution, but with a considerably delayed onset (800-1,000 ms). We suggest that this negativity reflects combinatorial processing required for producing -t participles in both children and adults and that the spatial and temporal modulations of this ERP effect across the three participant groups are due to developmental changes of the brain networks involved in processing morphologically complex words.

Regular and irregular inflection in children's production has been examined in many previous studies. Yet, little is known about the processes involved in children's recognition of inflected words. To gain insight into how children process inflected words, the current study examines regular -t and irregular -n participles of German using the cross-modal priming technique testing 108 monolingual German-speaking children in two age groups (group I, mean age: 8;4, group II, mean age: 9;9) and a control group of 72 adults. Although both age groups of children had the same full priming effect as adults for -t forms, only children of age group II showed an adult-like (partial) priming effect for -n participles. We argue that children (within the age range tested) employ the same mechanisms for regular inflection as adults but that the lexical retrieval processes required for irregular forms become more efficient when children get older.

Background: When reading a word, skilled adult readers automatically decompose the word into its separate morphemes by processing the word's morphoorthography. In children, however, it still remains unclear when and how they start to automatically decompose words into morphemes. Methods: To better understand how primary school children learn and integrate automatic morphological processes into their reading, we conducted a masked priming experiment with n = 218 first to fourth graders and a control group of 36 adult readers. Participants saw prime words on a computer screen for 67 ms, followed by a lexical decision task. For each target word, we constructed three prime words: an unrelated control prime, a semantic control prime and a test prime. The test prime was either morpho-semantically, morpho-orthographically or purely orthographically related to the target word. We analysed error rates and reaction times with linear mixed-effects models and linear combinations. Results: The error analysis revealed one significant interaction in the morpho-semantic condition for fourth graders. The reaction time analysis revealed different priming effects depending on age group: first and second graders showed no priming effects, while third graders showed priming in the morpho-semantic condition, and fourth graders and adults showed priming both in the morpho-semantic and morpho-orthographic condition. Conclusions: We conclude that (i) fourth graders automatically decompose written words into morphemes based on the words' morpho-orthography, (ii) third graders automatically detect stems in morphologically complex forms but do not rely on morpho-orthographic representations while (iii) first and second graders show no indication of either of these processes. Our results are theoretically consistent with the 'semantic view' within a localist account and can be explained by edge-aligned embedded word activation. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

No abstract