Mean Length of Utterance in Czech Toddlers: Validity Estimates and Comparison of Words, Morphemes, and Syllables.

Purpose: We examined the properties of mean length of utterance (MLU) in Czech, a morphologically complex Slavic language. We compared the scores of MLU calculated in different units and based on different sample lengths and assessed its validity against another transcript and test-based measures.

Method: One hundred nine children were recorded during free-play at 2;6 and 3;11 (years;months).

Noun imageability and the processing of sensory-based information.

The aim of this study was to test whether the availability of internal imagery elicited by words is related to ratings of word imageability. Participants are presented with target words and, after a delay allowing for processing of the word, answer questions regarding the size or weight of the word referents. Target words differ with respect to imageability.

How to Build a Communicative Development Inventory: Insights From 43 Adaptations.

Purpose: This article reviews 43 adaptations of the MacArthur-Bates Communicative Development Inventories (MB-CDIs), a tool used for measuring children's communicative and language skills. The aim is to provide an overview of different approaches to develop local versions of the instrument (reflecting linguistic and cultural specifics) and to formulate recommendations and suggestions that expand the current guidelines of the MB-CDI Advisory Board. The article also discusses cross-linguistic differences in the structure of this tool, as well as the availability of sources for the language-specific MB-CDI adaptations.

Corpus-based age of word acquisition: Does it support the validity of adult age-of-acquisition ratings?

Age of acquisition (AoA) is presumed to reflect the age or relative order in which words are learned, but is often measured using adult ratings or adult-reported observations and might thus reflect more about the adult language than about the acquisition process. Objective AoA estimates are often limited to words whose referents can be shown in pictures. We created a corpus-derived AoA estimate based on first word occurrences in a longitudinal corpus of child English, and evaluated its reliability and validity against other measures of AoA.

Emergency cesarean section is a risk factor for depressive symptoms when breastfeeding is limited.

Objective: Previous studies indicated associations between cesarean section (CS), breastfeeding, and depressive symptoms. There is, however, little research integrating these variables into one model to analyze their interrelations. The aim of this observational prospective longitudinal study is to examine whether the effect of CS on postpartum depressive symptoms is mediated by difficulties with breastfeeding.

Here come the nouns: Czech two-year-olds use verb number endings to predict sentence subjects.

Two-year-old children can use gender or number agreement to predict upcoming words in phrases or sentences. However, most findings showed prediction from freestanding grammatical words, such as articles or copulas. While this shows knowledge of agreement relations, it might be limited to a narrow set of grammatical words.

Validity of the SDDS: A 40-item vocabulary screening tool for 18- to 42-month olds in Czech.

Background: Children with early language delays are at increased risk of persistent language impairment. Early identification and intervention are desirable. Parent-report inventories are useful screening tools, but the screening context places limits at their length.

The development of infants' sensitivity to native versus non-native rhythm.

Speech rhythm is considered one of the first windows into the native language, and the taxonomy of rhythm classes is commonly used to explain early language discrimination. Relying on formal rhythm classification is problematic for two reasons. First, it is not known to which extent infants' sensitivity to language variation is attributable to rhythm alone, and second, it is not known how infants discriminate languages not classified in any of the putative rhythm classes.

Perceptual sensitivity to vowel quality and vowel length in the first year of life.

The perceptual attunement to native vowel categories has been reported to occur at 6 months of age. However, some languages contrast vowels both in quality and in length, and whether and how the acquisition of spectral and duration-cued contrasts differs is uncertain. This study traced the development of infants' sensitivity to native (Czech) vowel-length and vowel-quality contrasts.

Sentence Imitation With Masked Morphemes in Czech: Memory, Morpheme Frequency, and Morphological Richness.

Purpose This study examined two markers of language impairment (LI) in a single experiment, testing sentence imitation and grammatical morphology production using an imitation task with masked morphemes. One goal was to test predictions of the morphological richness account of LI in Czech. We also tested the independent contributions of language and memory skills to sentence imitation performance.

Early infant temperament shapes the nature of mother-infant bonding in the first postpartum year.

Objective: This study examined longitudinal relations between maternal bonding and infant temperament in the first nine months after birth.

Design: Our sample consisted of 281 women, enrolled at five maternity hospitals, who completed questionnaires during the first week (T1), at six weeks (T2) and nine months postpartum (T3). Maternal bonding was assessed using the Mother-to-Infant Bonding Scale at T1 and T2 and the Postpartum Bonding Questionnaire at T3.

Age of acquisition of 299 words in seven languages: American English, Czech, Gaelic, Lebanese Arabic, Malay, Persian and Western Armenian.

We present a new set of subjective Age of Acquisition (AoA) ratings for 299 words (158 nouns, 141 verbs) in seven languages from various language families and cultural settings: American English, Czech, Scottish Gaelic, Lebanese Arabic, Malaysian Malay, Persian, and Western Armenian. The ratings were collected from a total of 173 participants and were highly reliable in each language. We applied the same method of data collection as used in a previous study on 25 languages which allowed us to create a database of fully comparable AoA ratings of 299 words in 32 languages.

Assessing longitudinal pathways between maternal depressive symptoms, parenting self-esteem and infant temperament.

Background: Previous studies of relations between parenting self-concepts, parental adjustment and child temperament have been ambiguous regarding the direction of influence; and have rarely followed families from pregnancy through the first year of life. The current study examines change and stability in maternal depressive symptoms, parenting competences and child temperament through the perinatal period until nine months postpartum.

Methods: Czech mothers (N = 282) participated at three time points: the third trimester of pregnancy (Time 1), six weeks (Time 2) and nine months postpartum (Time 3).

Imageability and Neighborhood Density Facilitate the Age of Word Acquisition in Czech.

Purpose The study examined the effects of imageability and phonological neighborhood density on the acquisition of word production in Czech, controlling for part-of-speech class, word length, and word frequency. Phonological neighborhood density is of interest because previous research has not examined highly inflected languages such as Czech. The effects of imageability on word acquisition are widely assumed, but only a few empirical studies examined such effects using child data directly.

Czech 23-month-olds use gender agreement to anticipate upcoming nouns.

Children acquiring Dutch, French, and Spanish can use gender of articles to facilitate the processing of upcoming nouns. The current study examined whether a similar effect can be found for bound gender-marking agreement morphemes in Czech, a language without obligatory articles. The experiment was designed so that the anticipatory effects of gender-marking morphemes before the head noun onset could be observed.

Propositional Density in Spoken and Written Language of Czech-Speaking Patients With Mild Cognitive Impairment.

Purpose: Propositional density (PD) is a measure of content richness in language production that declines in normal aging and more profoundly in dementia. The present study aimed to develop a PD scoring system for Czech and use it to compare PD in language productions of older people with amnestic mild cognitive impairment (aMCI) and control participants matched on age, gender, and education.

Method: Groups of patients with aMCI and cognitively healthy control participants (N = 20 each) provided short spoken and written language samples.

[Postpartum blues - a Czech adaptation of the Maternity Blues Questionnaire].

Objective: To validate the Kennerley and Gaths Maternity Blues Questionnaire (MBQ) for the Czech postpartum population, to present the psychometric properties of the Czech version of that screening method, and to assess its predictive power for the risk of postpartum depression.

Design: Original study.

Setting: Department of Psychology, Faculty of Arts and Philosophy, Charles University, Prague.

Victimization and its associations with peer rejection and fear of victimization: Moderating effects of individual-level and classroom-level characteristics.

Background: Past research has shown that peer victimization by bullying is associated with peer rejection and fear of victimization, but little is known about the interplay between victimization and other characteristics in the prediction of these experiences. We assume that the associations between victimization and peer rejection/fear of victimization are moderated by multiple characteristics, including aspects of peer ecology.

Aims: The study tested whether the links between victimization and peer rejection/fear of victimization are moderated by gender, peer support, and two features of classroom peer ecology: classroom victimization rate and classroom hierarchy (the variability of popularity among students).

[Satisfaction with perinatal care in Vysočina region in the period between October 2013 and September 2014].

Objective: To assess women's satisfaction with perinatal care provided in maternity hospitals in Vysočina region, to identify the areas with high satisfaction scores as well as those requiring improvement, and to describe the factors influencing women's satisfaction, i. e. dissatisfaction with the care provided during labor and birth and the early postpartal period.

Sentence imitation as a marker of SLI in Czech: disproportionate impairment of verbs and clitics.

Purpose: The authors examined sentence imitation as a potential clinical marker of specific language impairment (SLI) in Czech and its use to identify grammatical markers of SLI.

Method: Children with SLI and the age- and language-matched control groups (total N = 57) were presented with a sentence imitation task, a receptive vocabulary task, and digit span and nonword repetition tasks. Sentence imitations were scored for accuracy and error types.

Noun imageability facilitates the acquisition of plurals: survival analysis of plural emergence in children.

Some research in child language suggests that semantically general verbs appear in grammatical structures earlier than semantically complex, specific ones. The present study examines whether this was the case in nouns, using imageability as a proxy measure of semantic generality. Longitudinal corpus data from 12 children from the Manchester corpus in CHILDES were used to obtain information on the first occurrence of plurals.

Mean length of utterance levels in 6-month intervals for children 3 to 9 years with and without language impairments.

Purpose: The mean length of children's utterances is a valuable estimate of their early language acquisition. The available normative data lack documentation of language and nonverbal intelligence levels of the samples. This study reports age-referenced mean length of utterance (MLU) data from children with specific language impairment (SLI) and children without language impairments.