Feature selection and classification: A developmental study

Two hundred and thirteen children between the ages of 4 and 16 sorted 30 complex objects freely into groups. These were either schematic faces, schematic imaginary animals, or histoform patterns and were constructed from 9 independently and continuously varying features, each with 10 levels. The three sets were equivalent in terms of underlying numerical structure. A new method of analysis of the groups formed yielded the following direct measures of subjective organization in the sorting of each child: the number of features used in sorting, the accuracy of sorting, and the number of independent dimensions of classification. Both the material and the analysis of sorting were devised on the assumption that only some of the component features of complex objects are used for classification, while others are ignored. Sorting performance differed markedly both with age and with different types of material. The improvement in sorting ability with age, except for the youngest children, could be attributed to an increase in the number of features used rather than an improvement in the accuracy of use. In contrast, the poor sorting of histoform patterns as opposed to faces and animals was due to a low level of sorting accuracy. The basic results on the development of classification confirmed previous studies, and hence suggest that it is valid to consider feature selection as a basic component of classification.     

Temperament and Character Inventory - Revised (TCI-R) 1 year after the earthquake of L’Aquila (Italy)

The aim of this pilot study was to evaluate the impact of L’Aquila earthquake (Italy) on the Temperament and Character Inventory - Revised (TCI-R) administered 1 year after the earthquake to a community sample of 375 subjects exposed to the earthquake and 480 non-exposed. Exposed people showed variations in the adaptive response to stress with higher Persistence (P) and lower Harm Avoidance (HA) dimensions among adult and lower self directedness (SD) and higher Harm Avoidance (HA) in older people. No differences in young adults were seen. Temperament and character dimensions are sensitive to trauma exposure in different ways in different age groups.     

A novel argument for the Universality of Parsing principles

Previous work on Relative Clause attachment has overlooked a crucial grammatical distinction across both the languages and structures tested: the selective availability of Pseudo Relatives. We reconsider the literature in light of this observation and argue that, all else being equal, local attachment is found with genuine Relative Clauses and that non-local attachment emerges when their surface identical imposters, Pseudo Relatives, are available. Hence, apparent cross-linguistic variation in parsing preferences is reducible to grammatical factors. The results from two novel experiments in Italian are presented in support of these conclusions.     

Examining the home advantage in the National Hockey League: Comparisons among regulation,overtime, and the shootout

ObjectivesTo investigate the magnitude of the home advantage in the National Hockey League (NHL) as games proceeded from regulation, to overtime, to the shootout, while adjusting for team quality.DesignArchival.MethodBinary logistic regression analyses were conducted using data from the 2005–2006 through 2013–2014 NHL seasons (N = 10,534 games) to compare home teams’ odds of winning in regulation, overtime, and the shootout.ResultsCompared to games decided in regulation, higher quality home teams' odds of winning were slightly lower when games concluded in either overtime or the shootout. Further, regardless of team quality, home teams’ odds of winning were moderately lower when games concluded in the shootout rather than overtime.ConclusionsThe shootout may affect home team players' psychological and behavioural states, generally resulting in a decrease in home teams’ odds of winning in the shootout relative to overtime.     

Why Mikey's right and my key's wrong: The significance of stress and word boundaries in a child's output system

The systematic errors children make in the course of phonological development, like adult production errors and adult phonological processes, can provide evidence of language production mechanisms. A detailed investigation of the environments in which velar stops are fronted by a phonologically delayed child reveals that fronting is dependent on both word stress and word boundaries; that it shows lexical exceptions; and that it occurs in output only. This distribution suggests that the child has output lexical representations which are independent of input lexical representations, and that the fronting error occurs in these output representations. It also suggests that prosodic features are crucial to the identification of articulatory features within these representations. Such an analysis has implications for theories of lexical access, and for the development of lexical access in children.