Sex differences in past tense overregularization

Hartshorne and Ullman (2006) presented naturalistic language data from 25 children (15 boys, 10 girls) and showed that girls produced more past tense overregularization errors than did boys. In particular, girls were more likely to overregularize irregular verbs whose stems share phonological similarities with regular verbs. It was argued that the result supported the Declarative/Procedural model of language, a neuropsychological analogue of the dual-route approach to language. In the current study we present experimental data that are inconsistent with these naturalistic data. Eighty children (40 males, 40 females) aged 5;0–6;9 completed a past tense elicitation task, a test of declarative memory, and a test of non-verbal intelligence. The results revealed no sex differences on any of the measures. Instead, the best predictors of overregularization rates were item-level features of the test verbs. We discuss the results within the context of dual versus single route debate on past tense acquisition.

The PTT-20 : UK normative data for 5-11 year olds on a 20 item past tnese taskThe PTT-20: UK normative data for 5- to 11-year-olds on a 20-item past-tense task

Background: Grammatical morphology, particularly the use of the past tense in English, has been identified as a behavioural marker for specific language impairment. However, there is a dearth of instruments that assess key verb features, are short and easy to administer for clinical use, and have normative data for the UK population.

Aims: The present study aimed to develop a short version of a past-tense task (named the PTT-20) and to provide UK normative data for a large control sample of primary school-age children.

Methods & Procedures: The task consisted of 20 items taken from a well-known 52-item task developed by Marchman, Wulfeck, and Ellis Weismer in 1999, retaining the key features and variety of verbs of the original design. It was administered to 424 typically developing children aged 5;0 to 11;6 years.

Outcomes & Results: The short version reduced administration time by two-thirds to around 5–8 minutes. Normative data revealed developmental progression in performance throughout the primary school years, with the task exhibiting ceiling effects in 29% of children by age 11 years. Expected and impaired performance indicators are presented by age band, that is, 5, 6, 7, 8, 9, 10, and 11 years. Comparisons between identified children with specific language impairment and typically developing children revealed significant differences in performance. The PTT-20 correlated highly with the full 52-item task and had good internal consistency.

Conclusions & Implications: The PTT-20 can be a useful tool in the identification and assessment of young school-age children with suspected language difficulties. It can also be used in research and practice as a benchmark against which to compare the ability of children with identified language impairments.

An examination of the associations among multiple memory systems, past tense, and vocabulary in typically developing 5 year old children

Purpose: Considerable research has investigated the role of verbal working memory in language development in children with and without language problems. Much less is currently known about the relationship between language and the declarative and procedural memory systems. This study examined whether these 2 memory systems were related to typically developing children's past tense and lexical knowledge.

Method: Fifty-eight typically developing children approximately 5 years of age completed a battery of linguistic and nonlinguistic tasks, including tests of vocabulary, past tense production, and procedural and declarative memory.

Results: The results showed that declarative and procedural memory were not correlated with either regular or irregular past tense use. A significant correlation was observed between declarative memory and vocabulary.

Conclusions: The results of the study were not consistent with the view that the declarative and procedural memory systems support children's use of the regular and irregular past tense. However, evidence was found suggesting that declarative memory supports vocabulary in this age group.

Future considerations for the training and development of Australian quality managers

Adequate, appropriate training of quality managers is essential to the development and implementation of effective quality management systems. This study reports on a survey of 235 Australian quality managers to determine their perceptions of their training and development needs, the extent to which these were being met, and their views on the future of their discipline. The study found that there was a general lack of systematization, most programs were short-term and delivered by a fragmented set of providers. Many managers had received no training in the past 5 years. While the respondents were generally satisfied with the training they had received, there was evidence that their insight into their own needs was imperfect. The respondents were divided between those who thought quality management would remain a discrete field and those who saw it being absorbed by other management systems. The challenges of developing an appropriate training and development regime in this environment are discussed.

An alternative perspective on relationships, loyalty and future store choice

The purpose of this research was to provide an alternative perspective for retailers to develop relationships and loyalty. This study suggests that traditional trust and commitment theories are somewhat imperfect in predicting future store choice. Through path modelling, we introduce two additional constructs of store functional loyalty and relationship worth. These constructs together with commitment are powerful predictors of future store choice. Furthermore, the study examines the antecedents of relationships, loyalty and future store choice. We conclude with new insights and practical suggestions for retailers to build relationships, loyalty and influence customers' future store choice.

The China threat : perceptions, myths and reality

"Since the end of the Cold War, one of the most significant debates in international relations has been the question of whether the rise of China as a major economic, political and military power will be a force for stability or instability in the international system and the East Asian region. Forceful arguments have been put forward on both sides."
"This book examines perceptions of the 'China Threat', and governments' policies in response to the perceived threat in a wide range of countries, including the United States, Russia, Europe, Japan, South Asia, South-East Asia and the Middle East, as well as the perceptions of the Chinese themselves. For each country current security concerns and policies, especially the policy of engagement, are examined in detail, and future prospects for relations with China are assessed. As the Bush administration in Washington increasingly focuses on China as a 'strategic competitor' and Sino-US-relations become increasingly tense, the 'China Threat' issue has come to dominate the security agenda in the Asia-Pacific region, and now poses the biggest foreign policy challenge of the twenty-first century."

Social identities and law students' writing

This paper argues that social identities, discursively speaking, consist of ‘positions’ that are individuated by distinctive linguistic features. These include distinctive patterns of representation indicated by clause structure and type, a set of priorities for attending to what is important indicated by thematic structure, and an orientation to the represented world and to self as indicated by modality, propositional attitudes and tense. A social identity comprises an array of these often contradictory ‘positions’ associated with a social or professional role. A person’s identity is constituted dynamically by the way they ‘reconcile’ the various positions that make up the social identity, and also, as Archer and Ivanic argue, by the way they reconcile a social with a personal or autobiographical identity. It is argued that this process of reconciliation gives clues about identity formation in the traces it leaves in grammatical texture.

This paper uses a simulated letter of advice to a client written by a group of first year law students to explore the discursive construction of social or professional identity. This letter is poorly written and full of grammatical mistakes and infelicities. It is argued that the mistakes provide a linguistic trace of the students’ struggle to reconcile the conflicting roles and positions they occupy as authors of the letter. In particular the students’ problems result from a struggle to reconcile their multiple positions as: students writing for assessment by a tutor about a legal problem, as a simulated firm of solicitors advising to a client, and as potential litigators anticipating the future course of events in their simulated moot court appearance.

Robust-diagnostic regression : a prelude for inducing reliable knowledge from regression

Regression lies heart in statistics, it is the one of the most important branch of multivariate techniques available for extracting knowledge in almost every field of study and research. Nowadays, it has drawn a huge interest to perform the tasks with different fields like machine learning, pattern recognition and data mining. Investigating outlier (exceptional) is a century long problem to the data analyst and researchers. Blind application of data could have dangerous consequences and leading to discovery of meaningless patterns and carrying to the imperfect knowledge. As a result of digital revolution and the growth of the Internet and Intranet data continues to be accumulated at an exponential rate and thereby importance of detecting outliers and study their costs and benefits as a tool for reliable knowledge discovery claims perfect attention. Investigating outliers in regression has been paid great value for the last few decades within two frames of thoughts in the name of robust regression and regression diagnostics. Robust regression first wants to fit a regression to the majority of the data and then to discover outliers as those points that possess large residuals from the robust output whereas in regression diagnostics one first finds the outliers, delete/correct them and then fit the regular data by classical (usual) methods. At the beginning there seems to be much confusion but now the researchers reach to the consensus, robustness and diagnostics are two complementary approaches to the analysis of data and any one is not good enough. In this chapter, we discuss both of them under the unique spectrum of regression diagnostics. Chapter expresses the necessity and views of regression diagnostics as well as presents several contemporary methods through numerical examples in linear regression within each aforesaid category together with current challenges and possible future research directions. Our aim is to make the chapter self-explained maintaining its general accessibility.