Using parent report to assess early lexical production in children exposed to more than one language

Limited expressive vocabulary skills in young children are considered to be the first warning signs of a potential Specific Language Impairment (SLI) (Ellis & Thal, 2008). In bilingual language learning environments, the expressive vocabulary size in each of the child’s developing languages is usually smaller compared to the number of words produced by monolingual peers (e.g. De Houwer, 2009). Nonetheless, evidence shows children’s total productive lexicon size across both languages to be comparable to monolingual peers’ vocabularies (e.g. Pearson et al., 1993; Pearson & Fernandez, 1994). Since there is limited knowledge as to which level of bilingual vocabulary size should be considered as a risk factor for SLI, the effects of bilingualism and language-learning difficulties on early lexical production are often confounded. The compilation of profiles for early vocabulary production in children exposed to more than one language, and their comparison across language pairs, should enable more accurate identification of vocabulary delays that signal a risk for SLI in bilingual populations. These considerations prompted the design of a methodology for assessing early expressive vocabulary in children exposed to more than one language, which is described in the present chapter. The implementation of this methodological framework is then outlined by presenting the design of a study that measured the productive lexicons of children aged 24-36 months who were exposed to different language pairs, namely Maltese and English, Irish and English, Polish and English, French and Portuguese, Turkish and German as well as English and Hebrew. These studies were designed and coordinated in COST Action IS0804 Working Group 3 (WG3) and will be described in detail in a series of subsequent publications. Expressive vocabulary size was measured through parental report, by employing the vocabulary checklist of the MacArthur-Bates Communicative Development Inventory: Words and Sentences (CDI: WS) (Fenson et al., 1993, 2007) and its adaptations to the participants’ languages. Here we describe the novelty of the study’s methodological design, which lies in its attempt to harmonize the use of vocabulary checklist adaptations, together with parental questionnaires addressing language exposure and developmental history, across participant groups characterized by different language exposure variables. This chapter outlines the various methodological considerations that paved the way for meaningful cross-linguistic comparison of the participants’ expressive lexicon sizes. In so doing, it hopes to provide a template for and encourage further research directed at establishing a threshold for SLI risk in children exposed to more than one language.

Seawater carbonate chemistry, sample density and Strongylocentrotus purpuratus size, filtering and respiration rate during experiments, 2011

Anthropogenic CO2 emissions are acidifying the world's oceans. A growing body of evidence is showing that ocean acidification impacts growth and developmental rates of marine invertebrates. Here we test the impact of elevated seawater pCO2 (129 Pa, 1271 µatm) on early development, larval metabolic and feeding rates in a marine model organism, the sea urchin Strongylocentrotus purpuratus. Growth and development was assessed by measuring total body length, body rod length, postoral rod length and posterolateral rod length. Comparing these parameters between treatments suggests that larvae suffer from a developmental delay (by ca. 8%) rather than from the previously postulated reductions in size at comparable developmental stages. Further, we found maximum increases in respiration rates of + 100 % under elevated pCO2, while body length corrected feeding rates did not differ between larvae from both treatments. Calculating scope for growth illustrates that larvae raised under high pCO2 spent an average of 39 to 45% of the available energy for somatic growth, while control larvae could allocate between 78 and 80% of the available energy into growth processes. Our results highlight the importance of defining a standard frame of reference when comparing a given parameter between treatments, as observed differences can be easily due to comparison of different larval ages with their specific set of biological characters.

Seawater carbonate chemistry, calcification and shell size of hard clam Mercenaria mercenaria during experiments, 2011

Increasing atmospheric carbon dioxide threatens to decrease pH in the world's oceans. Coastal and estuarine calcifying organisms of significant ecological and economical importance are at risk; however, several biogeochemical processes drive pH in these habitats. In particular, coastal and estuarine sediments are frequently undersaturated with respect to calcium carbonate due to high rates of organic matter remineralization, even when overlying waters are saturated. As a result, the post-larval stages of infaunal marine bivalves must be able to deposit new shell material in conditions that are corrosive to shell. We measured calcification rates on the hard clam, Mercenaria spp.,in 5 post-larval size classes (0.39, 0.56, 0.78, 0.98, and 2.90 mm shell height) using the alkalinity anomaly method. Acidity of experimental water was controlled by bubbling with air-CO2 blends to obtain pH values of 8.02, 7.64, and 7.41, corresponding to pCO2 values of 424, 1120, and 1950 µatm. These pH values are typical of those found in many near-shore terrigenous marine sediments. Our results show that calcification rate decreased with lower pH in all 5 size classes measured. We also found a significant effect of size on calcification rate, with the smaller post-larval sizes unable to overcome dissolution pressure. Increased calcification rate with size allowed the larger sizes to overcome dissolution pressure and deposit new shell material under corrosive conditions. Size dependency of pH effects on calcification is likely due to organogenesis and developmental shifts in shell mineralogy occurring through the post-larval stage. Furthermore, we found significantly different calcification rates between the 2 sources of hard clams we used for these experiments, most likely due to genotypic differences. Our findings confirm the susceptibility of the early life stages of this important bivalve to decreasing pH and reveal mechanisms behind the increased mortality in post-larval juvenile hard clams related to dissolution pressure, that has been found in previous studies.

Seawater carbonate chemistry and biological processes during experiments with a Sea Star Crassaster papposus, 2010

Ocean acidification (OA) is believed to be a major threat for near-future marine ecosystems, and that the most sensitive organisms will be calcifying organisms and the free-living larval stages produced by most benthic marine species. In this respect, echinoderms are one of the taxa most at risk. Earlier research on the impact of near-future OA on echinoderm larval stages showed negative effects, such as a decreased growth rate, increased mortality, and developmental abnormalities. However, all the long-term studies were performed on planktotrophic larvae while alternative life-history strategies, such as nonfeeding lecithotrophy, were largely ignored. Here, we show that lecithotrophic echinoderm larvae and juveniles are positively impacted by ocean acidification. When cultured at low pH, larvae and juveniles of the sea star Crossaster papposus grow faster with no visible affects on survival or skeletogenesis. This suggests that in future oceans, lecithotrophic species may be better adapted to deal with the threat of OA compared with planktotrophic ones with potentially important consequences at the ecosystem level. For example, an increase in populations of the top predator C. papposus will likely have huge consequences for community structure. Our results also highlight the importance of taking varying life-history strategies into account when assessing the impacts of climate change, an approach that also provides insight into understanding the evolution of life-history strategies.

A Developmental Approach to Sport Expertise

This chapter examines the personal and contextual factors of youth sport that affect sport expertise and developmental outcomes. The developmental model of sport participation (DMSP) is used as a comprehensive framework that outlines different pathways of involvement in sport. Activities and contexts that promote continued sport participation and expert performance are discussed as the building blocks of all effective youth sport programs. This chapter provides evidence that performance in sport, participation, and psychological development should be considered as a whole instead of as separate entities by youth sport programmers. Adults in youth sports (i.e. coaches, parents, sport psychologists, administrators) must consider the differing implications of concepts such as deliberate play, deliberate practice, sampling, specialization, and program structure at different stages of an athlete's talent development. Seven postulates are presented regarding important transitions in youth sport and the role that sampling and deliberate play, as opposed to specialization and deliberate practice, can have during the childhood in promoting continued participation and elite performance in sport

A Meaner, More Callous Digital World for Youth? The Relationship Between Violent Digital Games, Motivation, Bullying and Civic Behavior amongst Children

The relationship between violent digital games and youth behavior remains contested in the scholarly literature. To date considerable scholarship has focused on university students with fewer studies of adolescents or children. The current study examines correlational relationships between violent game exposure and bullying behaviors, antisocial attitudes, civic attitudes and civic behaviors in a sample of 304 children from the United Kingdom (Mean age = 12.81). The paper also considered motivational influences on use of violent digital games. Results indicated that violent game exposure did not correlate meaningfully with either antisocial or civic behaviors or attitudes. These results are discussed in a motivational and developmental context.

Beyond maternal death: improving the quality of maternal care through national studies of ‘near-miss’ maternal morbidity

Knight M, Acosta C, Brocklehurst P, Cheshire A, Fitzpatrick K, Hinton L, Jokinen M, Kemp B, Kurinczuk JJ, Lewis G, Lindquist A, Locock L, Nair M, Patel N, Quigley M, Ridge D, Rivero-Arias O, Sellers S, Shah A on behalf of the UKNeS coapplicant group. Background Studies of maternal mortality have been shown to result in important improvements to women’s health. It is now recognised that in countries such as the UK, where maternal deaths are rare, the study of near-miss severe maternal morbidity provides additional information to aid disease prevention, treatment and service provision. Objectives To (1) estimate the incidence of specific near-miss morbidities; (2) assess the contribution of existing risk factors to incidence; (3) describe different interventions and their impact on outcomes and costs; (4) identify any groups in which outcomes differ; (5) investigate factors associated with maternal death; (6) compare an external confidential enquiry or a local review approach for investigating quality of care for affected women; and (7) assess the longer-term impacts. Methods Mixed quantitative and qualitative methods including primary national observational studies, database analyses, surveys and case studies overseen by a user advisory group. Setting Maternity units in all four countries of the UK. Participants Women with near-miss maternal morbidities, their partners and comparison women without severe morbidity. Main outcome measures The incidence, risk factors, management and outcomes of uterine rupture, placenta accreta, haemolysis, elevated liver enzymes and low platelets (HELLP) syndrome, severe sepsis, amniotic fluid embolism and pregnancy at advanced maternal age (≥ 48 years at completion of pregnancy); factors associated with progression from severe morbidity to death; associations between severe maternal morbidity and ethnicity and socioeconomic status; lessons for care identified by local and external review; economic evaluation of interventions for management of postpartum haemorrhage (PPH); women’s experiences of near-miss maternal morbidity; long-term outcomes; and models of maternity care commissioned through experience-led and standard approaches. Results Women and their partners reported long-term impacts of near-miss maternal morbidities on their physical and mental health. Older maternal age and caesarean delivery are associated with severe maternal morbidity in both current and future pregnancies. Antibiotic prescription for pregnant or postpartum women with suspected infection does not necessarily prevent progression to severe sepsis, which may be rapidly progressive. Delay in delivery, of up to 48 hours, may be safely undertaken in women with HELLP syndrome in whom there is no fetal compromise. Uterine compression sutures are a cost-effective second-line therapy for PPH. Medical comorbidities are associated with a fivefold increase in the odds of maternal death from direct pregnancy complications. External reviews identified more specific clinical messages for care than local reviews. Experience-led commissioning may be used as a way to commission maternity services. Limitations This programme used observational studies, some with limited sample size, and the possibility of uncontrolled confounding cannot be excluded. Conclusions Implementation of the findings of this research could prevent both future severe pregnancy complications as well as improving the outcome of pregnancy for women. One of the clearest findings relates to the population of women with other medical and mental health problems in pregnancy and their risk of severe morbidity. Further research into models of pre-pregnancy, pregnancy and postnatal care is clearly needed.

Delay Assignment Optimization Strategies at Pre- Tactical and Tactical Levels

This paper compares different optimization strategies for the minimization of flight and passenger delays at two levels: pre-tactical, with on-ground delay at origin, and tactical, with airborne delay close to the destination airport. The optimization model is based on the ground holding problem and uses various cost functions. The scenario considered takes place in a busy European airport and includes realistic values of traffic. Uncertainty is introduced in the model for the passenger allocation, minimum time required for turnaround and tactical uncertainty. Performance of the various optimization processes is presented and compared to ratio by schedule results.

The reliability and factorial validity of the Adolescent Alcohol Involvement Scale in a large sample in the United Kingdom

The assessment of adolescent drinking behavior is a complex task, complicated by variability in drinking patterns, the transitory and developmental nature of the behavior and the reliance (for large scale studies) on self-report questionnaires. The Adolescent Alcohol Involvement Scale (Mayer & Filstead, 1979) is a 14-item screening tool designed to help to identify alcohol misusers or more problematic drinkers. The present study utilized a large sample (n = 4066) adolescents from Northern Ireland. Results of Confirmatory Factor Analyses and reliability estimates revealed that the 14-items share sufficient common variance that scores can be considered to be reliable and that the 14 items can be scored to provide a composite alcohol use score.

Temporary sequences and description of the emergency of newborns loggerhead in the Cape Verde archipelago

[EN] Sea turtles bury their eggs in the sand of the beach, where they incuba te. After a period of approximately two months, hatchlings break the eggshell and remain inside the chamber for three to seven days (Hays & Speakman, 1993). Then they leave the nest and emerge to the surface of the beach, going quickly towards the surf, to begin their pelagic and developmental stage (e.g., López-Jurado & Andreu, 1998). Hatchlings usually do not emerge from the nest as a single group. They emerge in groups at different moments, resulting in more than one emergence per nest during sorne days (Whitherington et al.,4 1990; Hays et al., 1992; Peters et al., 1994).

A Vinculação e a Auto-Estima em Jovens Não-Institucionalizados Vs. Institucionalizados

Introdução: Uma relação de vinculação segura implica a presença de um modelo representacional das figuras de vinculação como “disponíveis” e capazes de proporcionar protecção e que a qualidade dos cuidados parentais precoce é fundamental a determinar a saúde mental dos indivíduos. Se esta relação assume um enorme relevância para a saúde mental de qualquer ser humano, a institucionalização de crianças/jovens, envolvendo ameaças em termos da disponibilidade das figuras de vinculação constitui uma condição propícia para atrasos de desenvolvimento e aumento da probabilidade do desenvolvimento de sintomatologia psicopatológica. Os objectivos deste estudo passam, então, por analisar as diferenças na vinculação, mas também na auto-estima, de jovens institucionalizados vs nãoinstitucionalizados. Metodologia: A nossa amostra é constituída por 223 jovens nãoinstitucionalizados de duas escolas do Concelho de Coimbra (média de idades M=15.3; desvio-padrão, DP=1.97) e 47 jovens institucionalizados (M=15.5 DP=1.93). Tanto os jovens institucionalizados como não-institucionalizados preencheram um questionário com questões sóciodemográficas, relacionais, escolares, de saúde e bem-estar (com pequenas particularidades em algumas variáveis conforme a sub-amostra), o Inventory of Parent Attachment (IPPA) e a Rosenberg Self-Esteem Scale (RSES). A sub-amostra de jovens institucionalizados respondeu ainda a questões sobre a sua adaptação/vivência ao/no Lar. Resultados: Os rapazes da amostra não institucionalizada apresentam uma pontuação média mais elevada de auto-estima vs. raparigas. Nos jovens institucionalizados não foram encontradas diferenças de género a este nível. Não existem diferenças de género, em ambas as sub-amostras, na pontuação total do IPPA e suas dimensões. Os rapazes nãoinstitucionalizados vs. institucionalizados não divergem na pontuação média total de autoestima. O mesmo sucede com as raparigas. Ambas as sub-amostras não divergem na pontuação média total do IPPA e suas dimensões. Na amostra não-institucionalizada quer nos rapazes, quer nas raparigas não existem diferenças na pontuação total média na RSES, entre os jovens mais novos vs. mais velhos. Na amostra institucionalizada também não se verificam diferenças na pontuação total na RSES por idades. Nos jovens não institucionalizados foram encontradas diferenças na pontuação total média no IPPA (e suas dimensões, à excepção da Alienação), por idade, com os mais novos a apresentarem sempre valores médios mais elevados. Na amostra institucionalizada estas diferenças não se verificaram. Nos rapazes e raparigas da amostra não-institucionalizada verificaram-se associações significativas entre a pontuação na RSES e no IPPA e em todas as suas dimensões. O mesmo se verificou na subamostra institucionalizada. Não existe uma associação significativa entre a pertença a dada sub-amostra e a pertença ao grupo “pouco seguro” vs. “muito seguro”. Apesar de outras associações terem sido encontradas, importa reforçar as associações significativas entre a pontuação na auto-estima e na vinculação total e suas dimensões (quer nos rapazes e raparigas não-institucionalizados, como na amostra institucionalizada) e variáveis como a sintomatologia depressiva, a sintomatologia ansiosa e algumas variáveis relacionais. Discussão/Conclusão: De um modo geral parecem não existir diferenças entre jovens nãoinstitucionalizados vs. institucionalizados em termos de vinculação e de auto-estima. Porém, a uma vinculação insegura e uma menor auto-estima associam-se piores outcomes (e.g. sintomatologia depressiva) em ambas as amostras. Os profissionais trabalhando com adolescentes não-institucionalizados ou institucionalizados devem preocupar-se em avaliar a sua auto-estima e vinculação, procurando, eventualmente, nelas intervir terapeuticamente. / Introduction: It is well kown that a secure attachment relation implies the presence of representational model of the attachment figures as being available and able to provide protection and that the quality of earlier parental care is crucial in determining subjects mental health and there developmental trajectories. If this relation assumes such a big relevance to the mental health of any human being, the institutionalization of children/adolescents, even when truly needed, involving threats in terms of the availability of attachment figures constitutes a condition that might lead to developmental delays and might increase the probability of psychopathological sintomatology developing. The aims of this study are, then, to analyze if there are attachment differences and, also, in self-esteem, between a sub-sample of non-institutionalized and institutionalized adolescents. Methodology: Our sample comprises 223 adolescents non-institutionalized from two schools of Coimbra Council (mean age, M=15.3; standard deviation, SD=1.97) and 47 institutionalized adolescents (M=15.5 SD=1.93). Both sub-samples filled in a questionnaire with sociodemographic, relational, about school, health and well-being questions (with small particularities in some variables, regarding each sub-sample), the Inventory of Parent Attachment (IPPA) and the Rosenberg Self-Esteem Scale (RSES). Institutionalized adolescents also answered questions about the adaptation/life to/in the institution. Results: Boys from the non-institutionalized sub-sample present an higher self-esteem mean score vs. girls. We did not find significant gender differences in self-esteem mean score in the subsample of institutionalized adolescents. There are no gender differences, in both sub-samples, in IPPA (and all its dimensions) total score. Non-institutionalized boys vs. institutionalized boys do not differ in their self-esteem mean score. The same is valid for girls. Both subsamples do not differ in their IPPA (and all its dimensions) mean score. In the noninstitutionalized sample, either in boys, either in girls there are no differences regarding total RSES mean score, between younger (12-15 years old) and older (16-20 years old) adolescents. In the institutionalized sample there were also no differences regarding this score, by age groups. In the non-institutionalized sub-sample we found differences in IPPA total mean score (an in all its dimensions, with the exception of Alienation), by age, with younger adolescents presenting always higher mean scores. In the institutionalized sample there were no differences. Both in boys and girls from the non-institutionalized sample there were significant associations between RSES score and IPPA (and all its dimensions) score. The same result was found in the total institutionalized sample. Although other significant associations were found, we must reinforce the presence of significant associations between self-esteem score and IPPA total score (and of its dimensions) (either in boys and girls noninstitutionalized, either in the institutionalized sub-sample) and variables such as lifetime and depressive symptomatology in the last two weeks, anxious symptomatology in the last two weeks and some relational variables. Discussion/Conclusion: In general, we did not found significant differences between non-institutionalized vs. institutionalized adolescents in terms of attachment and self-esteem. However, a secure attachment and a lower self-esteem are associated with worst outcomes (e.g. depressive symptomatology) in both samples. Professionals working with adolescents, either or not institutionalized must assess their selfesteem and attachment and might, eventually, intervene on these aspects therapeutically.

Assessing the Association between Receipt of Antimalarial Drugs and Adverse Pregnancy Outcomes using Pooled Data

Thesis (Ph.D.)--University of Washington, 2016-08