Computational Modeling of Statistical Learning: Effects of Transitional Probability Versus Frequency and Links to Word Learning

Statistical learning mechanisms play an important role in theories of language acquisition and processing. Recurrent neural network models have provided important insights into how these mechanisms might operate. We examined whether such networks capture two key findings in human statistical learning. In Simulation 1, a simple recurrent network (SRN) performed much like human learners: it was sensitive to both transitional probability and frequency, with frequency dominating early in learning and probability emerging as the dominant cue later in learning. In Simulation 2, an SRN captured links between statistical segmentation and word learning in infants and adults, and suggested that these links arise because phonological representations are more distinctive for syllables with higher transitional probability. Beyond simply simulating general phenomena, these models provide new insights into underlying mechanisms and generate novel behavioral predictions.     

The Developmental Origins of Gaze‐Following in Human Infants

During the first year of life, infants develop the capacity to follow the gaze of others. This behavior allows sharing attention and facilitates language acquisition and cognitive development. This article reviews studies that investigated gaze‐following before 12 months of age in typically developing infants and discusses current theoretical perspectives on early GF. Recent research has revealed that early GF is highly dependent on situational constraints and individual characteristics, but theories that describe the underlying mechanisms have partly failed to consider this complexity. We propose a novel framework termed the perceptual narrowing account of GF that may have the potential to integrate existing theoretical accounts.     

Why Primates? The Importance of Nonhuman Primates for Understanding Human Infancy

We introduce the thematic collection by noting some striking similarities in the cognitive abilities of human infants and nonhuman primates. What are the implications of these similarities for our comprehension of human infant cognition? After providing a brief historical and conceptual background on comparative behavioral research, we discuss how work with nonhuman primates has impacted theories of core knowledge, domain specificity, and language. We conclude by previewing the articles comprising this special issue of Infancy.     

How and when does speech-acting generate social innovations

Speaking is a normal, a special and ubiquitous human activity. Speaking or writing as a subjective and willful activity directed at others takes place within a dense set of behavioral norms. Speaking also activates selectively resources, concepts, logics and rules in language. We investigate the power of the language institution, speech-acting, constructed narratives and deliberations in creating social innovations. We look at new organizations, especially the constitution of new groups with operative collective intentions as social innovations. We ask how speech-acting theory can add or deepen insight into the constitution, the creation, the sustainability and the breakdown of organizations. Speech-acting theory has a focus on rationality as reasoning. Both Amartya Sen and John Searle have delved into reasoning – as creative subjectivity in multi-institutional settings. We try to exploit critically some of their philosophical findings into the field of empirical organization and social innovation studies.     

An examination of the mechanisms underlying the effects of physical activity on brain and cognition

Physical activity positively influences brain health and cognitive functioning in older adults. Several physiological and psychological mechanisms have been identified to underlie such a relationship. Cardiovascular fitness is accompanied with changes in mechanisms such as cerebral blood flow, neurotrophic factors, neurotransmitter systems and neural architecture that have themselves been associated with cognitive performance. Factors associated with exercise such as arousal, mood and self-perception of competence seem also to influence cognitive performance. Other explanation for the benefits of exercise in cognition, results from the fact that the performance of motor skills involve an important cognitive component (e.g., executive functions and information processing speed). Evidence of brain plasticity and behavior has been provided from studies where animals are exposed to enriched or complex environments. Exposure to such paradigms in which physical activity plays an important role has been found to influence various aspects of brain function and structure. Studies using neuroimaging techniques have established a link between the acquisition of different motor skills and the occurrence of neuroplasticity in human adults. This literature review indicates that the type of exercise and its specific perceptual and cognitive characteristics may influence cognitive performance. However, most of the research has been focused on self-paced movements or automatized skills and few intervention studies have examined the results of merging exercise and cognitive training in a single program. An important scientific challenge for the coming years is to design exercise programs capable of mobilizing several type of mechanisms underlying the effects of physical activity on brain and cognition.     

Assessing the language of 2 year-olds: From theory to practice

Early screening for language problems is a priority given the importance of language for success in school and interpersonal relationships. The paucity of reliable behavioral instruments for this age group prompted the development of a new touchscreen language screener for 2-year-olds that relies on language comprehension. Developmental literature guided selection of age-appropriate markers of language disorder risk that are culturally and dialectally neutral and could be reliably assessed. Items extend beyond products of linguistic knowledge (vocabulary and syntax) and tap the process by which children learn language, also known as fast mapping. After piloting an extensive set of items (139), two phases of testing with over 500 children aged 2; 0–2; 11 were conducted to choose the final 40-item set. Rasch analysis was used to select the best fitting and least redundant items. Norms were created based on 270 children. Sufficient test-retest reliability, Cronbach's alpha, and convergent validity with the MB-CDI and PPVT are reported. This quick behavioral measure of language capabilities could support research studies and facilitate the early detection of language problems.     

The Immigrant Advantage in Adolescent Educational Expectations

Previous research has shown uniquely high expectations among children of immigrants. However, existing studies have not focused on why children of immigrants have an expectations advantage over their native‐born counterparts or if this has changed over time. This study shows that an immigrant advantage in graduate school expectations persists among adolescent children of immigrants today. Regression analyses reveal that this advantage is largely explained by higher parental expectations, greater interest in school, and foreign language use in early childhood. We argue that these factors can be conceptualized as forms of cultural capital stemming from unique aspects of the immigrant experience that are common across immigrant families.     

The concept of social movement

Recent developments in social movement research have evidenced a greater underlying consensus in the field than one might have assumed. Efforts have been made to bridge different perspectives and merge them into a new synthesis. Yet, comparative discussion of the concept of ‘social movement’ has been largely neglected so far. This article reviews and contrasts systematically the definitions of ‘social movement’ formulated by some of the most influential authors in the field. A substantial convergence may be detected between otherwise very different approaches on three points at least. Social movements are defined as networks of informal interactions between a plurality of individuals, groups and/or organizations, engaged in political or cultural conflicts, on the basis of shared collective identities. It is argued that the concept is sharp enough a) to differentiate social movements from related concepts such as interest groups, political parties, protest events and coalitions; b) to identify a specific area of investigation and theorising for social movement research.     

Comparative studies and sociological theory: Autobiographical notes

The following article presents a brief survey on the development of the author's sociological studies and research, especially on the ways in which he has explored in these studies the relations between comparative studies and major problems and developments in sociological theory. The article analyzes how the central focus of his interest has been the problem of human creativity and its limitations, especially as it related to the social arena, the construction of different social formations—ranging from the so-called microsituations to the more formalized institutional and macroinstitutional formations—the problem of charisma and its routinization.     

The Study of Language in Organizations: A Symbolic Interactionist Stance

Very few models have been developed fromresearch on language in organizations, and those thatexist are usually very general. In addition, theassumptions on which they are based are not alwaysexplicit, which means that the limits of the modelsthemselves cannot be seen. After describing thecharacteristics of research that could be done onlanguage from an objectivist and a subjectivist stance,and specifying the limits of these two fundamental views, thispaper proposes an explicit model for understandinglanguage based on a symbolic interactionist stance, withemphasis on ascribing meaning and understanding language in the context of the interactivesituation in which it occurs. The interactive situationcomprises three fundamental components: theenvironmental, cognitive, and emotional contexts. In themodel, the tongue and psycholinguistic schemata of theindividuals concerned inevitably have a restrictiveeffect on the language used, and the language contextmay help make the speaker's remarks meaningful. The assumptions underlying the choice of asymbolic interactionist stance are described, and thepaper ends with some suggested avenues for researchrevealing new topics or new ways of studying oldtopics.     

Sociology and the study of non-western societies

This paper attacks parochialism, ethnocentrism, and universalism in Western sociology. Conceptual limitations of the discipline are discussed in light of the emergent transnational scene. The author argues that new or revised analytical and theoretical concepts in the discipline are essential for sociological studies in non-Western societies. The professional role of the sociologist undertaking research in a non-Western society is discussed from the standpoint of international competency, language facility, and constraints and challenges. The fledgling movement toward cross-national and world sociology in the United States is indicated in developments such as dependency studies, world system theory, and the activities of the American Sociological Association. The author ofHistorical and Cultural Dictionary of Thailand. His research publications have focused on the Thai rural family, medical professions, and socioeconomic change in Southeast Asia.     

International comparative explorations of prostitution policies: lessons from two European projects

In this contribution we reflect on our experiences of co-designing and coordinating two comparative projects on prostitution policies in Europe by focusing in particular on the epistemological workings underpinning their design and execution. We set out two main goals. The first is to shed light on what the epistemological and methodological issues we encountered reveal about the field of prostitution policy studies, an endeavor which can contribute to better comparative research in the field. The second goal is to relate the scope, developments, outcomes and expectations of the two projects to recent attempts to identify a “one-size-fits-all” model of prostitution regulation, and to interrogate whether transplanting it across Europe is a desirable outcome. Building on the lessons learned from the projects, we propose an approach to prostitution policy development that is reflective of the specific contexts within which the policies are meant to be applied.     

Effects of Welfare Reform on Education Acquisition of Adult Women

Education beyond traditional ages for schooling is an important source of human capital acquisition among adult women. Welfare reform, which began in the early 1990s and culminated in the passage of the Personal Responsibility and Work Opportunity Reconciliation Act in 1996, promoted work rather than education acquisition for this group. Exploiting variation in welfare reform across states and over time and using relevant comparison groups, we undertake a comprehensive study of the effects of welfare reform on adult women’s education acquisition. We first estimate effects of welfare reform on high school drop-out of teenage girls, both to improve upon past research on this issue and to explore compositional changes that may be relevant for our primary analyses of the effects of welfare reform on education acquisition among adult women. We find that welfare reform significantly reduced the probability that teens from disadvantaged families dropped out of high school, by about 15%. We then estimate the effects of welfare reform on adult women's school enrollment and conduct numerous specification checks, investigate compositional selection and policy endogeneity, explore lagged effects, stratify by TANF work incentives and education policies, consider alternative comparison groups, and explore the mediating role of work. We find robust and convincing evidence that welfare reform significantly decreased the probability of college enrollment among adult women at risk of welfare receipt, by at least 20%. It also appears to have decreased the probability of high school enrollment among this group, on the same order of magnitude. Future research is needed to determine the extent to which this behavioral change translates to future economic outcomes.     

Modeling the Development of Infant Categorization

Research on infant categorization has made remarkable progress since the first studies were reported in the late 1970s (e.g., Cohen & Caputo, 1978; Cohen & Strauss, 1977; Strauss, 1979). This progress is evident in a recent volume on early categorization and concept acquisition (Rakison & Oakes, 2003), the first half of which is devoted entirely to theory and research on infant categorization. Even in the early days of such research an important distinction was made between demonstration‐oriented studies and process‐oriented studies (Cohen & Younger, 1983; Younger & Cohen, 1985). Demonstration studies simply presented infants with established category items (by adult standards) such as pictures of stuffed animals, faces, dogs, cats, animals, or vehicles and examined whether infants would generalize their responding to novel members of the same category. Process studies, on the other hand, presented infants with novel categories and manipulated feature values of category items to examine the mechanisms underlying infant category acquisition.     

Integration of Childhood Immigrants in the Short and Long Run – Swedish Evidence1

Immigrant children are often at a disadvantage at school while they adjust to their new environment. It has been found that the age at immigration of 7 or above represents a sensitive period as regards these children’s school performance for two main reasons: they have passed their prime age for language learning, and their acquisition of subject skills is less efficient while they learn to master the new language. Using Swedish administrative data, we track childhood immigrants born between 1972 and 1976 over time from adolescence (at 16) to adulthood (at 30), and study the role of age at immigration for educational and labor market outcomes. We find that immigration at a sensitive age (compared to a very young age) has a strong negative impact on compulsory school performance, but that the same individuals catch up strongly in terms of final educational attainment. In spite of this educational catching up, however, we find a considerable negative impact on earnings for men. We are able to rule out two potential mechanisms behind this puzzling result: It cannot be explained either by an impact on the chosen field of study or on completion time.     

Sociocultural Variations in Adolescent Girls' Expressions of Distress: What We Know and Need to Know

Social workers have a unique interest in understanding diversity in patterns of human adaptation to adverse circumstances. This paper draws social workers' attention to empirical research on sociocultural variations in adolescent girls' expressions of distress. Focusing on internalizing and externalizing modes of expression, the author summarizes current studies that investigate ethnic/race and socioeconomic influences on adolescent girls' behavioral and psychological symptoms of underlying distress. This review of existing literature points to the need for a more refined understanding of multiple and interacting influences on adolescent female patterns of expression and draws several implications for social work practice with this diverse population group.     

Young Infants Detect the Direction of Biological Motion in Point‐Light Displays

In the present study, we examined if young infants can extract information regarding the directionality of biological motion. We report that 6‐month‐old infants can differentiate leftward and rightward motions from a movie depicting the sagittal view of an upright human point‐light walker, walking as if on a treadmill. Inversion of the stimuli resulted in no detection of directionality. These findings suggest that biological motion displays convey information for young infants beyond that which distinguishes them from nonbiological motion; aspects of the action itself are also detected. The potential visual mechanisms underlying biological motion detection, as well as the behavioral interpretations of point‐light figures, are discussed.     

The Antinomy of Multilingual US Literature

Abstract

After September 2001, among other effects that may or may not have been foreseen, the new direction of US national political imperatives revived support for foreign language learning as a component of human or cultural intelligence. Across the political spectrum, competence in languages other than English is now acknowledged as a serious weakness of educational, economic, and military resources in the United States. In the critical study of contemporary literature, the multilingual spirit of this new emphasis collides with the monolingual letter of the publication industry that produces books. In the production of research objects for scholars of contemporary literature, language difference, the ground zero of multiple language acquisition, is displaced by translative representation of language difference. To the extent that scholars understand themselves as analysts of already given objects, regarding intervention in the process of literary production as beyond their practical or desired ability, the premium placed on language difference here is insufficiently theorized.