多元视角下的异性友谊

异性友谊是一种重要的人际关系。已有研究考察了一般异性友谊的特点、影响和维系, 同时也考察了利友关系的心理特征和身心影响。异性朋友可能会对青少年和大学生的社会适应带来消极影响, 但这一影响可能具有文化差异。进化心理学取向的研究者主要考察了异性友谊的进化功能, 他们认为异性友谊能够帮助个体完成长期择偶目标或短期择偶目标, 同时还能够为个体提供重要的择偶信息。未来研究有必要结合新出现的友谊理论, 考察不同年龄阶段的异性友谊, 同时关注异性友谊中的个体差异变量, 比如人际性行为取向、暗黑三合一性格和择偶智力。     

高中生人际信任、疏离感和公民责任意识的关系研究*

探讨高中生的人际信任、疏离感、公民责任意识三者之间的关系。以《高中生人际信任量表》、《青少年学生疏离感量表》和《公民责任意识问卷》为测试工具,在天津市中学随机抽取316名在校学生为被试,进行调查研究。统计结果表明：高中学生人际信任、疏离感和公民责任意识之间存在显著相关。对这三个变量进行中介效应分析,结果发现,疏离感分别部分中介了人际信任的三个维度人品信任、能力信任、行为一致性与公民责任意识之间的关系。人际信任的三个维度既可以直接地影响公共责任意识,也可以通过疏离感来间接地影响高中生的公民责任意识。     

Increased social distance makes people more risk-neutral

Individuals are consistently observed to be risk-averse over gains and risk-seeking over losses. This study examined whether increased social distance would change these behavioral patterns. To test our hypothesis, social distance was manipulated by asking the participants to make decisions either for themselves or for another person (Experiment 1), either for a known person or for an unknown person (Experiment 2), and either for a close friend or for a distant friend (Experiment 3). The results of Experiments 1 and 3 showed that increased social distance made people more risk-neutral, and such an effect was stronger in the gain domain than in the loss domain. However, the effect of social distance was not observed in Experiment 2. These findings suggest that risk preferences are influenced by the social distance between decision makers and beneficiaries.     

(Re)evaluating the Implications of the Autoregressive Latent Trajectory Model Through Likelihood Ratio Tests of Its Initial Conditions

The autoregressive latent trajectory (ALT) model synthesizes the autoregressive model and the latent growth curve model. The ALT model is flexible enough to produce a variety of discrepant model-implied change trajectories. While some researchers consider this a virtue, others have cautioned that this may confound interpretations of the model's parameters. In this article, we show that some—but not all—of these interpretational difficulties may be clarified mathematically and tested explicitly via likelihood ratio tests (LRTs) imposed on the initial conditions of the model. We show analytically the nested relations among three variants of the ALT model and the constraints needed to establish equivalences. A Monte Carlo simulation study indicated that LRTs, particularly when used in combination with information criterion measures, can allow researchers to test targeted hypotheses about the functional forms of the change process under study. We further demonstrate when and how such tests may justifiably be used to facilitate our understanding of the underlying process of change using a subsample (N = 3,995) of longitudinal family income data from the National Longitudinal Survey of Youth.     

Planning Beyond the Next Trial in Adaptive Experiments: A Dynamic Programming Approach

Experimentation is at the heart of scientific inquiry. In the behavioral and neural sciences, where only a limited number of observations can often be made, it is ideal to design an experiment that leads to the rapid accumulation of information about the phenomenon under study. Adaptive experimentation has the potential to accelerate scientific progress by maximizing inferential gain in such research settings. To date, most adaptive experiments have relied on myopic, one‐step‐ahead strategies in which the stimulus on each trial is selected to maximize inference on the next trial only. A lingering question in the field has been how much additional benefit would be gained by optimizing beyond the next trial. A range of technical challenges has prevented this important question from being addressed adequately. This study applies dynamic programming (DP), a technique applicable for such full‐horizon, “global” optimization, to model‐based perceptual threshold estimation, a domain that has been a major beneficiary of adaptive methods. The results provide insight into conditions that will benefit from optimizing beyond the next trial. Implications for the use of adaptive methods in cognitive science are discussed.     

不同性别比和资源获取能力对未婚男性择偶标准的影响

本研究分别采用文字启动和图片启动两种方式,探讨不同性别比下男性择偶标准的动态变化。实验1和实验2的结果均显示:相比于男多女少启动,在女多男少启动下,男性对女性"好资源"的要求会明显升高。不同性别比启动和男性资源获取能力(而不是童年经济状况)在男性择偶标准上存在着交互效应。相比于男多女少启动,资源获取能力强的男性在女多男少启动下对女性好资源的要求会明显提高,而资源获取能力弱的男性在两种启动下对女性好资源的要求没有显著变化。结论:对资源获取能力强的男性而言,对女性"好资源"的偏好是择偶选择过多时所产生的奢侈需求。     

Indentation behaviour of ion-irradiated X-750 Ni-based superalloy

The mechanical properties of an ion-irradiated Ni-based superalloy have been evaluated using nano-indentation hardness tests. A high-energy Ni ion beam was employed for irradiation at room temperature up to different doses. Nano-indentation tests were carried out in the range of 100–1000 nm to measure hardness changes of the experimental alloy. The results show softening of the irradiated material compared to the un-irradiated material, with the softening being more pronounced at the higher dose. Cross-sectional transmission electron microscopy characterisation reveals that γ′-precipitate instability (disordering/dissolution) is the main reason for the softening behaviour and this outweighs the hardening effect of irradiation-induced defects.     

Ghrelin level negatively predicts quality of life in obese women

A cross-sectional cohort study was conducted to investigate whether ghrelin level in obese women predicts the quality of life (QOL). A total of 307 subjects fulfilled the criteria: (1) age between 20 and 65 years old, (2) body mass index ≥27 kg/m² (3) waist circumference ≥80 cm were enrolled in the study. All subjects were assigned to one of the plasma ghrelin level categories according to the quartiles. The median of age and BMI of the 307 obese women were 45 ± 18 years and 29.9 ± 4.1 kg/m², respectively. The main outcome evaluated is the associations of plasma ghrelin level and QOL, which were evaluated using multiple linear regression analysis. Results of linear trend test show significant statistical difference in plasma lipoproteins (triglyceride, cholesterol, HDL-cholestero and LDL-cholesterol = and levels of obesity-related hormone peptides, including leptin, adiponectin, insulin among quartiles of ghrelin. Multiple liner regression analysis of serum obesity-related hormone peptide level and QOL using stepwise method shows ghrelin concentration was the only predictor of QOL, including PCS-12 level (β = ?0.18, p = 0.001), MCS-12 level (β = ?0.14, p = 0.009), WHOQOL-BREF scores: physical (β = ?0.13, p = 0.03), psychological (β = ?0.16, p = 0.007), social (β = ?0.21, p?= < 0.001), and environmental (β = ?0.22, p?= <0.001), after adjusting other factors for obese female subjects. This study demonstrated that ghrelin concentration is strongly associated with QOL level among obese women. Hence, ghrelin concentration might be a valuable marker to be monitored in obese women.     

Metaphorical mapping between raw–cooked food and strangeness–familiarity in Chinese culture

Previous research has demonstrated metaphorical mappings between physical coldness–warmth and social distance–closeness. Since the concepts of interpersonal warmth are frequently expressed in terms of food-related words in Chinese, the present study sought to explore whether the concept of raw–cooked food could be unconsciously and automatically mapped onto strangeness–familiarity. After rating the nutritive value of raw or cooked foods, participants were presented with morphing movies in which their acquaintances gradually transformed into strangers or strangers gradually morphed into acquaintances, and were asked to stop the movies when the combined images became predominantly target faces. The results demonstrated that unconscious and automatic metaphorical mappings between raw–cooked food and strangeness–familiarity exist. This study provides a foundation for testing whether Chinese people can think about interpersonal familiarity using mental representations of raw–cooked food and supports cognitive metaphor theory from a crosslinguistic perspective.