Objectives. This article reports on the adaptation procedure of the MacArthur-Bates Communicative Development Inventory (MB-CDI): Words & Gestures into Czech. The parental-report questionnaire screens communicative development in infants aged 8 to 18 months and focuses on general communicative skills, active and passive vocabulary, and communicative gestures. The content of the Czech adaptation needs to reflect the communicative practices specific to the Czech language and cultural environment. Methods. The final item list for the questionnaire was developed by combining a variety of methods including translations, parental diaries from 44 caregivers, an expert focus group, and a corpus survey. The preliminary questionnaire was piloted in two rounds, altogether in 95 Czech caregivers and 100 children. Preliminary content was drawn from translations and parental diaries. These items were reduced based on assessment of child-development experts and frequency in four Czech-language corpora. Item analysis was conducted after each of the pilot rounds to remove from the final content words or gestures which were infrequently checked. Conclusions. This process assured that the Czech CDI screens communicative development on items relevant to the Czech linguistic and social landscape. As such, Dovyko I offers a powerful tool to measure communicative development in local children and may also find use in research of children with different developmental and linguistic characteristics. Limitations. The questionnaire is designed as a complement to other existing methods of communicative screening. The tool thus does not serve for final diagnosis but may help indicate an area problematic for the child or motivate further medical, cognitive, or linguistic assessment. The norming, validity, and reliability studies, which have been completed with Czech-speaking families, are not described in this article but separately in the tool’s manual.

Neural discrimination of auditory contrasts is usually studied via the mismatch negativity (MMN) component of the event-related potentials (ERPs). In the processing of speech contrasts, the magnitude of MMN is determined by both the acoustic as well as the phonological distance between stimuli. Also, the MMN can be modulated by the order in which the stimuli are presented, thus indexing perceptual asymmetries in speech sound processing. Here we assessed the MMN elicited by two types of phonological contrasts, namely vowel quality and vowel length, assuming that both will elicit a comparably strong MMN as both are phonemic in the listeners' native language (Czech) and perceptually salient. Furthermore, we tested whether these phonemic contrasts are processed asymmetrically, and whether the asymmetries are acoustically or linguistically conditioned. The MMN elicited by the spectral change between /a/ and /ε/ was comparable to the MMN elicited by the durational change between /ε/ and /ε:/, suggesting that both types of contrasts are perceptually important for Czech listeners. The spectral change in vowels yielded an asymmetrical pattern manifested by a larger MMN response to the change from /ε/ to /a/ than from /a/ to /ε/. The lack of such an asymmetry in the MMN to the same spectral change in comparable non-speech stimuli spoke against an acoustically-based explanation, indicating that it may instead have been the phonological properties of the vowels that triggered the asymmetry. The potential phonological origins of the asymmetry are discussed within the featurally underspecified lexicon (FUL) framework, and conclusions are drawn about the perceptual relevance of the place and height features for the Czech /ε/-/a/ contrast.

• Publikační typ
• časopisecké články MeSH