Developmental and computational perspectives on infant social cognition

Adults effortlessly and automatically infer complex pat- terns of goals, beliefs, and other mental states as the causes of others’ actions. Yet before the last decade little was known about the developmental origins of these abilities in early infancy. Our understanding of infant social cognition has now improved dramatically: even preverbal infants appear to perceive goals, preferences (Kushnir, Xu, & Wellman, in press), and even beliefs from sparse observations of inten- tional agents’ behavior. Furthermore, they use these infer- ences to predict others’ behavior in novel contexts and to make social evaluations (Hamlin, Wynn, & Bloom, 2007). Keywords: Social cognition; Cognitive Development; Computational Modeling; Theory of Min

A multilab study of bilingual infants: Exploring the preference for infant-directed speech

From the earliest months of life, infants prefer listening to and learn better from infant-directed speech (IDS) compared with adult-directed speech (ADS). Yet IDS differs within communities, across languages, and across cultures, both in form and in prevalence. This large-scale, multisite study used the diversity of bilingual infant experiences to explore the impact of different types of linguistic experience on infants’ IDS preference. As part of the multilab ManyBabies 1 project, we compared preference for North American English (NAE) IDS in lab-matched samples of 333 bilingual and 384 monolingual infants tested in 17 labs in seven countries. The tested infants were in two age groups: 6 to 9 months and 12 to 15 months. We found that bilingual and monolingual infants both preferred IDS to ADS, and the two groups did not differ in terms of the overall magnitude of this preference. However, among bilingual infants who were acquiring NAE as a native language, greater exposure to NAE was associated with a stronger IDS preference. These findings extend the previous finding from ManyBabies 1 that monolinguals learning NAE as a native language showed a stronger IDS preference than infants unexposed to NAE. Together, our findings indicate that IDS preference likely makes similar contributions to monolingual and bilingual development, and that infants are exquisitely sensitive to the nature and frequency of different types of language input in their early environments

Randomised controlled effectiveness trial of a needs-based psychosocial intervention service for carers of people with schizophrenia

BACKGROUND Family interventions are effective in reducing relapse in patients with schizophrenia, but there is little work demonstrating the effectiveness of the interventions in routine service settings. AIMS To test the effectiveness of a needs-based family intervention service for patients recruited as out-patients and their carers, including those of low expressed emotion status. METHOD Carers of out-patient schizophrenia sufferers selected only on illness history factors were randomly allocated to receive either family support alone or in combination with systematic psychosocial interventions based on an assessment of need. Delivery of family interventions attempted to involve the clinical team. RESULTS Relapse outcomes were superior for family-treated patients at six-month follow-up, although most of the clinical and symptom patient variables assessed remained stable, as did measures of carer burden. CONCLUSIONS The study demonstrated the effectiveness of family interventions in routine service settings. Problems with staff, patient and carer engagement and participation were identified

An argument for renewed focus on epidemiology for public health

PURPOSE: While epidemiology has an indispensable role in serving public health, the relative emphasis of applications of epidemiology often tend toward individual-level medicine over public health in terms of resources and impact. METHODS: We make distinctions between public health and medical applications of epidemiology to raise awareness among epidemiologists, many of whom came to the field with public health in mind. We discuss reasons for the overemphasis on medical epidemiology and suggest ways to counteract these incentives. RESULTS: Public health epidemiology informs interventions that are applied to populations or that confer benefits beyond the individual, while medical epidemiology informs interventions that improve the health of treated individuals. Available resources, new biomedical technologies, and existing epidemiologic methods favor medical applications of epidemiology. Focus on public health impact and methods suited to answer public health questions can create better balance and promote population-level improvements in public health. CONCLUSIONS: By deliberately reflecting on research motivations and long-term goals, we hope the distinctions presented here will facilitate critical discussion and a greater consciousness of our potential impact on both individual and population-level health. Renewed intentions towards public health can help epidemiologists navigate potential projects and ultimately contribute to an epidemiology of consequence

A rare regulatory variant in the MEF2D gene affects gene regulation and splicing and is associated with a SLE sub-phenotype in Swedish cohorts

Systemic lupus erythematosus (SLE) is an autoimmune disorder with heterogeneous clinical presentation and complex etiology involving the interplay between genetic, epigenetic, environmental and hormonal factors. Many common SNPs identified by genome wide-association studies (GWAS) explain only a small part of the disease heritability suggesting the contribution from rare genetic variants, undetectable in GWAS, and complex epistatic interactions. Using targeted re-sequencing of coding and conserved regulatory regions within and around 215 candidate genes selected on the basis of their known role in autoimmunity and genes associated with canine immune-mediated diseases, we identified a rare regulatory variant rs200395694:G &gt; T located in intron 4 of the MEF2D gene encoding the myocyte-specific enhancer factor 2D transcription factor and associated with SLE in Swedish cohorts (504 SLE patients and 839 healthy controls, p = 0.014, CI = 1.1–10). Fisher’s exact test revealed an association between the genetic variant and a triad of disease manifestations including Raynaud, anti-U1-ribonucleoprotein (anti-RNP), and anti-Smith (anti-Sm) antibodies (p = 0.00037) among the patients. The DNA-binding activity of the allele was further studied by EMSA, reporter assays, and minigenes. The region has properties of an active cell-specific enhancer, differentially affected by the alleles of rs200395694:G &gt; T. In addition, the risk allele exerts an inhibitory effect on the splicing of the alternative tissue-specific isoform, and thus may modify the target gene set regulated by this isoform. These findings emphasize the potential of dissecting traits of complex diseases and correlating them with rare risk alleles with strong biological effects.Funding agencies: Knut and Alice Wallenberg Foundation; Swedish Research Council; Swedish Research Council FORMAS; Swedish Rheumatism Foundation; King Gustaf Vs 80-Year Foundation; Swedish Institute scholarship; King Gustav V 80th years Foundation scholarship; Kazan Federa</p