Parent–Adolescent Agreement on Disruptive Behavior Symptoms: A Multitrait-Multimethod Model

This study examined parent–adolescent agreement on reports of inattention, hyperactivity/impulsivity, and conduct disorder in 203 adolescents (94 girls, 109 boys) ranging in age from 13 to 18 years (M = 15.21, SD = 1.37). Results of confirmatory factor analyses provided additional evidence of construct validity for these traits in adolescents. Internal consistency was examined for parent reports and adolescent self-reports. In addition, correlational analyses were used in a multitrait-multimethod format (MTMM; D. T. Campbell & D. W. Fiske, 1959) to examine convergent and discriminant validity. Results showed that parents provided more consistent and valid reports of inattention and hyperactivity/impulsivity, whereas adolescents provided more consistent and valid reports of conduct disorder. In addition, interviews produced higher levels of convergence than rating scales. These findings are discussed in terms of implications for assessment of disruptive behavior disorders.     

The delayed trigger voice key: an improved analogue voice key for psycholinguistic research

Many researchers rely on analogue voice keys for psycholinguistic research. However, the triggering of traditional simple threshold voice keys (STVKs) is delayed after response onset, and the delay duration may vary depending on initial phoneme type. The delayed trigger voice key (DTVK), a standalone electronic device that incorporates an additional minimum signal duration parameter, is described and validated in two experiments. In Experiment 1, recorded responses from a nonword naming task were presented to the DTVK and an STVK. As compared with hand-coded reaction times from visual inspection of the waveform, the DTVK was more accurate than the STVK, overall and across initial phoneme type. Rastle and Davis (2002) showed that an STVK more accurately detected an initial [s] when it was followed by a vowel than when followed by a consonant. Participants’ responses from that study were presented to the DTVK in Experiment 2, and accuracy was equivalent for initial [s] in vowel and consonant contexts. Details for the construction of the DTVK are provided.     

Intergroup relations in soccer finals: people's forecasts of the duration of emotional reactions of in-group and out-group soccer fans

The authors examined the hypothesis that people forecast a longer duration of uniquely human secondary emotions for their in-group than for an out-group. The authors conducted a field experiment in the setting of the European soccer championship. They asked Belgian participants to forecast the intensity with which their in-group Belgian fans or the out-group Turkish fans would experience various primary and secondary emotions in response to their team's victory or loss immediately after the Turkey-Belgium match and three days later. The results support the hypothesis. Moreover, and as the authors expected, they found no differences in the participants' forecasts of primary emotions. The authors discussed the implications of these findings for intergroup relations in general and for soccer fans' behavior in particular.     

Attentional blink differences between adolescent dyslexic and normal readers

The goal of this study was to evaluate the possibility that dyslexic individuals require more working memory resources than normal readers to shift attention from stimulus to stimulus. To test this hypothesis, normal and dyslexic adolescents participated in a Rapid Serial Visual Presentation experiment (Raymond, Shapiro, & Arnell, 1992). Surprisingly, the result showed that the participants with dyslexia produced a shallower attentional blink than normal controls. This result may be interpreted as showing differences in the way the two groups encode information in episodic memory. They also fit in a cascade-effect perspective of developmental dyslexia.     

Relational frame theory: A new paradigm for the analysis of social behavior

Recent developments in the analysis of derived relational responding, under the rubric of relational frame theory, have brought several complex language and cognitive phenomena within the empirical reach of the experimental analysis of behavior. The current paper provides an outline of relational frame theory as a new approach to the analysis of language, cognition, and complex behavior more generally. Relational frame theory, it is argued, also provides a suitable paradigm for the analysis of a wide variety of social behavior that is mediated by language. Recent empirical evidence and theoretical interpretations are provided in support of the relational frame approach to social behavior.     

Relation between volume,number of faces and three-dimensional growth laws in coarsening cellular patterns

Abstract

The recently established linear growth law for three-dimensional diffusive coarsening shows zero average growth for grains with 15·8 faces, while the average number of faces per grain in the pattern is 13·7 ± 0·1. In the better-known two-dimensional case, grains with six sides (the average number) show zero growth. We show that the three-dimensional zero growth value is a consequence only of the linear form of the law and the cubic dependence of average area per grain on the number of faces.     

The structure of monodisperse foam

Abstract

We report various structural observations of monodisperse foams in the bulk, at surfaces, in cylinders and between glass plates. In general they tend to refute Matzke's assertion that even monodisperse foam is totally disordered. However, it appears that the tendency to order is quite limited in the bulk under normal circumstances. Small fragments are observed which correspond closely to the recently reported structure of Weaire and Phelan.     

A simple analytical theory of localisation in 2D foam rheology

A very simple derivation is given for the dependence of localisation length on boundary velocity and various model parameters, in the continuum theory of 2D foam shear localisation. It is pointed out that the existence of distinct yield and limit stresses can complicate this theory for low boundary velocities, by introducing another mechanism for localisation, which does not depend on wall drag.     

Bubble sorting in a foam under forced drainage

A highly polydisperse foam is subjected to a constant liquid flow from above. For sufficiently high flow rates, large-scale bubble motion is observed, in the course of which large bubbles rise to the top of the foam until a steady state is reached at which the average bubble size increases smoothly with height.