The Flynn effect,group differences,and g loadings

Flynn effect gains are predominantly driven by environmental factors. Might these factors also be responsible for group differences in intelligence? Group differences in intelligence have been clearly shown to strongly correlate with g loadings. The empirical studies on whether the pattern of Flynn effect gains is the same as the pattern of group differences yield conflicting findings. We present new evidence on the topic using a number of datasets from the US and the Netherlands. Score gains and g loadings showed a small negative average correlation. The general picture is now that there is a small, negative correlation between g loadings and Flynn effect gains. It appears that the Flynn effect and group differences have different causes.     

Personality trait change and life satisfaction in adults: The roles of age and hedonic balance

This paper examines whether changes in personality traits influenced life satisfaction (LS). This involved investigating whether these associations were moderated by age and mediated by hedonic balance (i.e., positive and negative affect). Participants included 11,104 Australian adults aged 18–79 years, with data available from two time points (baseline and 4-year follow up). Latent difference score modeling indicated that increased neuroticism was associated with lower LS, whereas increased extraversion, conscientiousness, and agreeableness were associated with higher LS. These relationships were moderated by age, and were less evident in older adults. Hedonic balance partially mediated the relationships between change in neuroticism and extraversion with LS. These findings provide important insights into longitudinal associations between personality change and LS.     

Children’s sequential information search is sensitive to environmental probabilities

We investigated 4th-grade children’s search strategies on sequential search tasks in which the goal is to identify an unknown target object by asking yes–no questions about its features. We used exhaustive search to identify the most efficient question strategies and evaluated the usefulness of children’s questions accordingly. Results show that children have good intuitions regarding questions’ usefulness and search adaptively, relative to the statistical structure of the task environment. Search was especially efficient in a task environment that was representative of real-world experiences. This suggests that children may use their knowledge of real-world environmental statistics to guide their search behavior. We also compared different related search tasks. We found positive transfer effects from first doing a number search task on a later person search task.     

Examining methodological variation in response inhibition: The effects of outcome measures and task characteristics on age-related differences

This study addressed methodological issues common to developmental studies on response inhibition. Age-related differences were investigated using two Stroop-like tasks with different levels of complexity and comparing different outcome measures in a sample of 340 children and adolescents aged 7–15 years. First, speed and accuracy of task performance were examined; the results showing that improvement in speed continued until age 13 in both the basic naming task and the two inhibition tasks. Improvement in accuracy was less consistent and continued until age 9 or 13 years. Second, two different algorithms were employed to control for the effects of basic processes in inhibition tasks. The difference algorithm indicated age-related differences similar to those for speed. The ratio algorithm, however, suggested earlier deceleration of development of response inhibition at 9 or 11 years of age. Factors related to the cognitive requirements and presented stimuli also had an effect on the results. The present findings shed light on the inconsistencies in the developmental studies of response inhibition and demonstrated that the selection of outcome measures and task characteristics are critical because they affect the way development is depicted.     

BODE指数评价慢性阻塞性肺疾病患者戒烟效果的研究

采用BODE评分系统评价慢性阻塞性肺疾病(COPD)患者的戒烟效果.248例吸烟的稳定期COPD患者进行随机分组,一组除常规治疗外给予戒烟干预(即戒烟组),一组给予常规治疗(即对照组).所有患者在入组时和观察结束时均给予肺功能检测、六分钟步行试验(6MWT)、呼吸困难评分(mMRC)、测量身高和体重,观察各指标的变化情况.至1年观察结束时,戒烟组和对照组在BMI(26.70±3.74 vs.25.17±3.63)、FEV1％pred (50.29±12.54 vs.46.68±15.37)、mMRC(1.64±0.90 vs.2.53±1.07)、6MWD(306.84±27.71 vs.257.84士30.34)方面分别比较,差异均有统计学意义(P＜0.05);戒烟组患者研究结束时除FEV1％ pred之外,其余观察指标BMI(26.70±3.74 vs.23.11±3.51)、mMRC (1.64士0.90 vs.2.18士0.91)、6MWD(306.84±27.71 vs.281.15±32.40)与基线值比较均有所改善(P＜0.05);对照组患者研究结束时除BMI之外,其余观察指标FEV1％ pred(46.68±15.37 vs.51.91±17.22)、mMRC(2.53士1.07 vs.2.01±0.97)、6MWD(257.84±309.34 vs.285.14±30.98)与基线值相比均有所下降(P＜0.05).COPD患者戒烟后其BODE评分系统中包括体重指数、肺功能指标、呼吸困难程度和运动能力在内的各个因素均得到一定程度的改善,生活质量显著提高.     

Coactive processing of sensory signals for in-group but not out-group stimuli

ABSTRACT

There is ample evidence showing that decision times are shorter when detecting two targets for which the same response is required, compared to when only one of the targets is present—resulting in a redundancy gain. Though effects of perceptual manipulations on redundancy gains are established, effects of social associations are still unclear. Here, we examined for the first time whether associating arbitrary stimuli with in-group as opposed to out-group targets modulates redundancy gains. Participants made associations between a shape, a colour and either in- or out-group labels. They then had to discriminate whether in- or out-group stimuli appeared (single or redundant features). Responses to in-group but not to out-group stimuli violated predictions of models in which the associated features are processed independently, and were consistent with in-group stimuli being processed with super-capacity. Our results, replicated across two experiments, providing the first evidence that there is enhanced perceptual integration for information associated with an in-group.     

The ‘workshy’

Abstract

This article is an attempt to apply the Kleinian ‘positions’ to long-term unemployment and to use them to suggest an alternative to punitive concepts such as ‘workshy’, while discussing the paradox in which a sincere attempt to find work exists alongside behaviour which seems designed to sabotage it. Such sabotaging behaviour not only offers secondary gains but affords channels for projections which mitigate unresolved aggression. While effective in coping with long-term unemployment, these mechanisms inhibit development and ‘benign cycles’ are gridlocked. Change and growth are seen as threats and aggression cannot be worked through and must be projected. Persecutory anxieties and a lack of enrichment by ‘otherness’ results and is reinforced by the reality of chronic unemployment. No opportunity for reparative work exists, so ‘concern’ and a sense of responsibility are inhibited. Narcissistic omnipotence and grandiosity is a feature. Long-term unemployment and homelessness show similar revolving door patterns connected to similar coping mechanisms.     

Psychological components of responses to interest inventory items

This study tests the relevance of 10 psychological traits that are assumed to exemplify responses to the items of INFORIZON, an occupational interest inventory. To accomplish this goal, the author analyzed the responses to the interest items based on a sample of 824 participants (17–25 years old), with an assessment of the items based on psychological traits using another French sample (147 participants) in the same age category. The results of multiple linear regression analyses supported most of the hypotheses presented in this study.     

Extending the Debate Between Spearman and Wilson 1929: When do Single Variables Optimally Reproduce the Common Part of the Observed Covariances?

The covariances of observed variables reproduced from conventional factor score predictors are generally not the same as the covariances reproduced from the common factors. We sought to find a factor score predictor that optimally reproduces the common part of the observed covariances. It was found algebraically that—under some conditions—the single observed variable with highest loading on a factor reproduces the non-diagonal elements of the observed covariance matrix more exactly than the conventional factor score predictors. This finding is linked to Spearman's and Wilson's 1929 debate on the use of single variables as factor score predictors. A population-based and a sample-based simulation study confirmed the algebraic result that taking a single variable can outperform conventional factor score predictors in reproducing the non-diagonal covariances when the nonzero loading size and the number of nonzero loadings per factor are small. The results indicated that a weighted aggregation of variables does not necessarily lead to an improvement of the score over the variable with the highest loading.     

On the Mathematical Relationship Between Latent Change Score and Autoregressive Cross-Lagged Factor Approaches: Cautions for Inferring Causal Relationship Between Variables

The present paper focuses on the relationship between latent change score (LCS) and autoregressive cross-lagged (ARCL) factor models in longitudinal designs. These models originated from different theoretical traditions for different analytic purposes, yet they share similar mathematical forms. In this paper, we elucidate the mathematical relationship between these models and show that the LCS model is reduced to the ARCL model when fixed effects are assumed in the slope factor scores. Additionally, we provide an applied example using height and weight data from a gerontological study. Throughout the example, we emphasize caution in choosing which model (ARCL or LCS) to apply due to the risk of obtaining misleading results concerning the presence and direction of causal precedence between two variables. We suggest approaching model specification not only by comparing estimates and fit indices between the LCS and ARCL models (as well as other models) but also by giving appropriate weight to substantive and theoretical considerations, such as assessing the justifiability of the assumption of random effects in the slope factor scores.