Taking the task seriously: reflections on measures of color acquisition

The experiments described in the lead articles by Kowalski and Zimiles and by O'Hanlon and Roberson examine factors that lead to color term acquisition. These experiments touch on the debate regarding the relative contributions of language and concepts in word learning. In this reflection, we examine how conclusions concerning the debate depend deeply on the particular task presented to children, and we propose an alternative approach to studying color term acquisition.     

Secondary ageing in Al-Cu-Mg

Secondary ageing, that is microstructural evolution occurring at room temperature after short heating at temperatures above the metastable phase boundary of Guinier-Preston zones, has been studied for an Al-Cu-Mg alloy with a high Cu-to-Mg ratio. Combined data from positron annihilation spectroscopy, Vickers microhardness measurements and differential scanning calorimetry show that, on secondary ageing after 5 or 7min at 190°C, firstly, hardening takes place at a rate nine to 16 times slower than natural age hardening; secondly, vacancies slowly released by Cu-rich aggregates formed during the heat treatment at 190°C promote further formation of solute aggregates, with a time-dependent chemical composition; thirdly, the thermal stability of the structures formed during secondary ageing increases with increasing dwell time at room temperature; and, fourthly, solute aggregates formed at 190°C undergo a structural reorganization and possibly a change in the composition, leading to species with a different thermal stability. The slow release of vacancies from Cu-rich aggregates is proposed as one of the limiting factors of the hardening rate.     

Positive emotion is associated with 6-year change in functional status in individuals aged 60 and older

Analyses examined both positive emotion (PE) at baseline and change in PE from baseline to follow up as predictors of change in functional status (FS). Initial models examined baseline PE, and change in PE, as predictors of change in FS adjusted for baseline PE, negative emotion (NE), FS, and age and gender. Final models included additional adjustments for frequency of social contact, marital status, body mass index, smoking status, drinking behavior, and comorbidity at baseline. Baseline PE was a predictor of change in FS, adjusted for NE, age, and gender (p?=?0.033). Additional covariates reduced the effect of baseline PE as a predictor of change in FS (p?=?0.115). Change in PE was a significant predictor of change in FS – increases in ratings of PE over time were associated with less decline in FS (p?=?0.001). The association for change in PE remained significant in the fully adjusted model (p?=?0.004). Results replicate our prior findings.     

What’s in a face? Perhaps some elements of both eudaimonic and hedonic well-being

The idea that eudaimonic well-being (EWB) should be distinguished from the more widespread notion of hedonic well-being (HWB), has stirred up disagreement among happiness researchers. Siding with EWB researchers, this study provides theoretical and empirical arguments supporting the distinctiveness and usefulness of a EWB dimension. A path model with data from Norwegian university students (N?=?184) showed that, when requested to draw both a happy face and a sad face, indicators of HWB were associated with a preference for working with the happy rather than the sad face. Indicators of EWB were uncorrelated with this hedonic bias. Eudaimonic feeling states were associated with the level of creativity involved in the drawings, while hedonic feelings were not. Finally, participants who draw bigger faces also felt more pleasure during the act of drawing. Eudaimonic feelings were unrelated to the size of the drawing.     

No Time of Day Modulation or Time Stamp on Multiple Memory Tasks in Rats

Various demonstrations of “time stamp” effects in the animal learning literature have reinforced the idea that circadian information is encoded as part of a combined internal/external representation of context and that this contextual information is utilized for complex retrieval processes supporting memory. The goal of the present series of experiments is to assess this idea by manipulating training/testing circadian times on a battery of learning and memory tasks commonly used in the rodent. The data obtained from five experiments using four different learning and memory paradigms provide no evidence for “time stamp” effects on place memory, context memory (aversive or appetitive), or S-R habit learning.     

家校合作对青少年学业成绩的影响：一个有调节的中介模型

本研究基于广州市基础教育质量监测项目,以2380名初中生及其家长为被试,构建一个有调节的中介模型,考察了家校合作对青少年学业成绩的影响机制。研究发现：（1）家校合作对青少年学业成绩具有显著的正向预测作用;（2）在家校合作对青少年学业成绩的影响中,亲子沟通发挥了部分中介作用;（3）独生状况调节了家校合作→亲子沟通→学业成绩的后半段,即相对于非独生子女而言,独生子女亲子沟通对学业成绩的促进作用更为显著。