In this chapter we present the initial stages of work that attempts to assess the ‘psychological reality ’ of one of the more subtle grammatical principles of Optimality Theory (‘OT’; Prince and Smolensky 1993), Richness of the Base. Within the OT competence theory, we develop several of this principle’s empirical predictions concerning the grammar’s final state (Section 1) and initial state (Section 2). We also formulate linking hypotheses which allow these predictions concerning competence to yield predictions addressing performance. We then report and discuss the results of experimental work testing these performance predictions with respect to linguistic processing in infants (Section 3) and adults (Section 4). 1.

Purpose: Although mean length of utterance (MLU) is a useful benchmark in studies of children with specific language impairment (SLI), some empirical and interpretive issues are unresolved. The authors report on 2 studies examining, respectively, the concurrent validity and temporal stability of MLU equivalency between children with SLI and typically developing children. Method: Study 1 used 124 archival conversational samples consisting of 39 children with SLI (age 5;0 [years;months]), 40 MLU-equivalent typically developing children (age 3;0), and 45 age-equivalent controls. Concurrent validity of MLU matches was examined by considering the correspondence between MLU and developmental sentence scoring (DSS), index of productive syntax (IPSyn), and MLU in words. Study 2 used 205 archival conversational samples, representing 5 years of longitudinal data collected on 20 children with SLI (from age 5;0) and 18 MLU matches (from age 3;0). Evaluation of growth dimensions within and across groups was carried out via growth-curve modeling. Results: In Study 1, high levels of correlation among the MLU, DSS, and IPSyn measures

The purpose of this study was to describe preschoolers ' conversational responsiveness in an integrated classroom setting. Variables of primary interest were the types of responses as a function of the conversational partner. The children were categorized according to language ability: normally developing, marginal (children previously diagnosed as language or speech impaired, but now functioning within the normal range), language impaired (LI), and speech impaired (SI). They were observed during free play. Differences in response types were apparent between groups with both adult and peer partners. LI and SI children were ignored by their peers and responded less often when a peer initiated to them. Hence, they participated in proportionately fewer peer interactions. These results suggest that peer interaction difficulties may be concomitant consequences of early speech and language impairments. Clinical implications for verbal interactive skill intervention, particularly with peers in classroom settings, are discussed KEY WORDS: social interactions, language impairments, speech impairments, discourse, child language Verbal interactive skills are central to theories of language development in the

The majority of studies in children’s acquisition of syntax have focused on production. However, research suggests that infants understand more about their language than they are themselves producing. The current work focused on one aspect of early syntax, the inflectional marker, –s, which functions both as a plural nominal inflection and the 3 ii rd person singular verbal inflection, in the receptive domain. The properties of the use of such inflectional markers by young children have generated a great deal of theoretical interest in the production literature. Experiments 1 and 2 tested 19-month-olds ’ sensitivity to this marker in singular, plural, and ungrammatical contexts, using the Headturn Preference Procedure. These infants preferred listening to grammatical passages when compared with uninflected ungrammatical passages, but showed no preference when compared with doubly inflected ungrammatical passages. This finding contradicts those in the productive domain, in which young children are much more likely to produce errors of omission than

ACQUISITION OF VARIABLE RULES: (-t,d) DELETION AND (ing) PRODUCTION IN PRESCHOOL CHILDREN JULIA LEE ROBERTS WILLIAM LABOV There have been many studies over the past few decades documenting the existence of variable rules in adult language. It is only recently, however, that the acquisition of these rules has been the focus of research, and that event has opened the door for questions about the interaction of the learning of categorical rules and that of variable rules. Specifically, questions have arisen as to whether these rules might not be construed as either a performance factor and/or a reflection of universal constraints on language. The present study examines the acquisition of (-t,d) deletion and (ing) production in 3- and 4-year-old children in order to ascertain their degree of mastery of phonological, grammatical, and social constraints. Seventeen children were tape recorded during play interview sessions in their South Philadelphia day care center. Six to thirteen sessions ...

Development and early focal brain injury 2 Over the past ten years, we have made significant progress in addressing key questions concerning deficit and development after early stroke. We found evidence of subtle early impairment and subsequent development in each domain examined. However, the profiles of impairment and development differed across domains. Deficits of language acquisition are initially pervasive in that they are observed following injury to widely distributed brain areas. Spatial analytic deficits exhibit more specific patterns of brain-behavior association, similar to those observed among adults with injury to comparable brain regions. Had we been working in isolation, the separate investigators associated with this project may have reached very different conclusions about the nature of development following early injury. Instead, we were forced to look for ways to resolve the apparent disparity in our cross-domain findings. The model that best fits our data focuses on redefining the nature of early plasticity. Recent animal studies provide strong evidence that plasticity plays a central role in brain development. Brain organization is to a large extent

A critical clinical issue is the identification of a clinical marker, a linguistic form or principle that can be shown to be characteristic of children with Specific Language Impairment (SLI). In this paper we evaluate, as candidate clinical markers, a set of morphemes that mark Tense. In English, this includes-s third person singular,-ed regular past, BE, and DO. According to the Extended Optional Infinitive Account (EOI) of Rice, Wexler, and Cleave (1995), this set of morphemes is likely to appear optionally in the grammars of children with SLI at a rate lower than the optionality evident in younger controls. Three groups of preschool children participated: 37 children with SLI, and two control groups, one of 40 MLU-equivalent children and another of 45 age-equivalent children. Three kinds of evidence support the conclusion that a set of morphemes that marks Tense can be considered a clinical marker: (a) low levels of accuracy for the target morphemes for the SLI group relative to either of the two control groups; (b) affectedness for the set of morphemes defined by the linguistic function of Tense, but not for morphemes unrelated to Tense; and (c) a bimodal distribution for Tense-marking morphemes relative to age peers, in which the typical children are at essentially adult levels of the grammar, whereas children in the SLI group were at low (i.e., non-adultlike) levels of

Social interactions among preschool children were classified into four groups according to language ability: normally developing English, specific language impairment (SLI), speech impairment (SI), and English as a second language (ESL). The children were observed in naturalistic classroom interactions on three occasions. Conversational turns were coded according to initiations and responses, and addressee. The results reveal differences across the groups of children. Normal language peers initiate interactions with each other and have a higher percentage of longer responses; normal language peers were the preferred addressee in peer initiations. In contrast, children with limited communication skills were more likely than their normal language peers to initiate with adults and to shorten their responses or use nonverbal responses. ESL children were the least likely to initiate interactions and were the most likely to be avoided as the recipient of an initiation. The findings are interpreted as evidence that preschool children are sensitive to relative communication skills and make adjustments in their social interactions accordingly. Multiple contributing factors are implicated, including intelligibility, limited linguistic flexibility, limited discourse skills, and self-consciousness about communicative competence.

One of the key requirements of the Common Core State Standards for Reading is that all students must be able to comprehend texts of steadily increasing complexity as they progress through school. By the time they complete the core, students must be able to read and comprehend independently and proficiently the kinds of complex texts commonly found in college and careers. The first part of this section makes a research-based case for why the complexity of what students read matters. In brief, while reading demands in college, workforce training programs, and life in general have held steady or increased over the last half century, K–12 texts have actually declined in sophistication, and relatively little attention has been paid to students ’ ability to read complex texts independently. These conditions have left a serious gap between many high school seniors ’ reading ability and the reading requirements they will face after graduation. The second part of this section addresses how text complexity can be measured and made a regular part of instruction. It introduces a three-part model that blends qualitative and quantitative measures of text complexity with reader and task considerations. The section concludes with three annotated examples showing how the model can be used to assess the complexity of various kinds of texts appropriate for different grade levels. Why Text Complexity Matters In 2006, ACT, Inc., released a report called Reading Between the Lines that showed which skills differentiated those students who equaled or exceeded the benchmark score (21 out of 36) in the reading section of the ACT college admissions

This dissertation is dedicated to the memory of my grandfather