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This paper presents the investigation and analysis of speech accommodation effects in data obtained from Spanish learners of German with varying proficiency levels. The production data were recorded during a collaborative map task of the Spanish learners of German among each other and with a native speaker of German. The map task was designed to target words and phrases with specific segmental and suprasegmental characteristics. These characteristics were derived from contrastive analyses of Spanish and German. The main objectives of the paper were to investigate whether segmental and suprasegmental characteristics of the target language German are affected by phonetic accommodation to varying degrees and whether these differences depend on the proficiency level of the speaker or the interlocutor. The statistical analysis, using regression analyses, revealed inconsistent accommodation effects across learners of different proficiency levels as well as different linguistic phenomena. In line with previous findings the results can best be accounted for by an adaptation of a dynamic system approach. [ABSTRACT FROM AUTHOR]

This paper examines the perceptual threshold in patterns of tonal timing (alignment) of Falling versus Low tones. The results indicate a remarkable sensitivity among the listeners. In a perception experiment with 30 participants, we tested how native speakers of the West Nilotic language Nuer responded to stimuli in which the timing of the F0 fall that distinguishes Low versus Fall following a High target is manipulated. We measured the threshold for the responses to shift tone perception from 25% to 75%. The results show that listeners only needed an average of 19 ms to differentiate between the melodic shapes and as little as 13 ms for one item. Perceptual sensitivity this fine-grained is not expected based on what is known about the Just Noticeable Difference (JND) from previous studies. Results from non-tonal languages report a sensitivity threshold for tonal timing of at least 50 ms at category boundaries. This difference suggests that whether or not subjects speak a tone language may be a determining factor in their JND. [ABSTRACT FROM AUTHOR]