On the atomic structure of an asymmetrical near Σ = 27 grain boundary in copper

The atomic structure of an asymmetrical near Σ = 27 {525} tilt grain boundary (GB) in copper is determined by coupling high-resolution transmission electron microscopy and molecular dynamics simulation. The average GB plane is parallel to {414} in crystal (1) and {343} in crystal (2). The detailed GB structure shows that it is composed of facets always parallel to {101} and {111} in crystals (1) and (2), respectively. The atomic structure of one facet is described using the structural units model. Each facet is displaced with respect to its neighbours by a pure step, giving rise to the asymmetry of the GB plane orientation. The energy of this asymmetrical GB is significantly lower than that of both the {525} symmetrical and the {11,1,11}/{111} asymmetrical Σ = 27 GBs. One GB region displays another atomic structure with a dislocation that accounts for the misfit between interatomic distances in the {414} and {343} GB planes.     

Brand Congruity and Comparative Advertising: When and Why Comparative Advertisements Lead to Greater Elaboration

Two experiments are conducted to examine when and why comparative advertisements lead to elaboration. Comparative advertisements in which the sponsor brand and the comparison brand are perceived to be dissimilar lead to greater elaboration, as evidenced by differences in argument quality, than comparative advertisements in which the sponsor and comparison brands are perceived to be similar. This pattern is particularly strong for those individuals not chronically predisposed to elaborate (low need for cognition), whereas those individuals chronically predisposed to elaborate (high need for cognition) elaborate the ads regardless of comparison composition. Results are consistent with our proposed brand congruity explanation.     

UNDERSTANDING DATA WHEN INTERACTIONS ARE PRESENT OR HYPOTHESIZED

Abstract— The traditional approach to interpreting data when an interaction is present is to interpret cell means as reflecting a difference between differences. An alternative is in interpret any main effects and separately interpret interaction residuals Interpretation of interaction residuals can sometimes lead to nonsensical conclusions. Thus in deciding between the approaches, researchers should consider (a) the conceptual nature of the variables involved, (b) relevant theories and (c) the additional data that might be necessary to distinguish among competing plausible representations. Issues have also arisen regarding how to best test a hypothesis that involves interaction variance. Some researchers have argued that the use of a focused contrast designed to test a specific ordering of cell means (e g., a linear contrast) is often the best strategy. We note potential problems with the use of such contrasts and discourage researchers form blanket use of contrasts that combine main effect and interaction variance.     

Differential Effectiveness of Behavioral Parent-Training and Cognitive-Behavioral Therapy for Antisocial Youth: A Meta-Analysis

Extended the findings from previous meta-analytic work by comparing the effectiveness of behavioral parent-training (BPT) and cognitive-behavioral therapy (CBT) for youth with antisocial behavior problems. Youth demographic variables were also examined as potential moderators of the effectiveness of these 2 types of interventions. Thirty BPT studies and 41 CBT studies met inclusion criteria for this meta-analysis. The weighted mean effect size (ES) for all interventions was 0.40. Youth age was found to moderate the outcome of the 2 interventions, with BPT having a stronger effect for preschool and school-aged youth and CBT having a stronger effect for adolescents. The results also indicate that there may be systematic differences in the outcomes associated with BPT and CBT when the setting of the intervention is considered, suggesting the need to carefully consider the effect of setting in future research. This study also highlights the need for outcome research dealing with more diverse populations and the better classification of research participants on different developmental trajectories of antisocial behavior.