群体水平IRT模型及其应用——兼与IRT的比较

传统上,群体评估都是以个体的评估结果的平均值为基础进行的。而群体水平IRT理论则可以避开对个体的评估,直接实现对群体的评估,它具有许多传统方法难以企及的优点。本文将群体水平IRT模型应用于2007年某省高考英语阅读理解的410所学校的能力评估,评估结果发现：410所学校的英语阅读理解能力几乎都在[-1,1]区间内,没有能力极高或极低的学校。对这些学校而言,测验中所有项目的难度较易,区分度适中。所有的评估结果与IRT模型的评估结果在 的水平上相关显著,表明GIRT模型在实践中是可以选择的一种群体评估方法。     

视知觉压力在基本心理能力老化中的作用

信息降格说认为, 感觉功能老化使认知系统难以获得良好的信息输入, 并必须牺牲有限的认知资源获得更好的刺激信息, 使能用于认知加工的资源不足, 造成认知老化。为探讨感觉功能对基本心理能力老化的作用, 该研究采用2(年龄组：年轻、老年组)×4(视知觉压力水平：高、中、低、无噪音)的混合设计, 考察年轻、老年组在相同视知觉压力下基本心理能力的年龄差异。结果发现和无噪音条件相比, 相同视知觉压力下基本心理能力(数字能力、归纳推理能力)的年龄差异减小, 甚至消失, 一定程度上支持信息降格说。视觉功能衰退可能是影响基本心理能力老化的重要因素, 但这种作用受认知资源的调节。     

Perceptual grouping and distance estimates in typical and atypical development: comparing performance across perception, drawing and construction tasks

Perceptual grouping is a pre-attentive process which serves to group local elements into global wholes, based on shared properties. One effect of perceptual grouping is to distort the ability to estimate the distance between two elements. In this study, biases in distance estimates, caused by four types of perceptual grouping, were measured across three tasks, a perception, a drawing and a construction task in both typical development (TD: Experiment 1) and in individuals with Williams syndrome (WS: Experiment 2). In Experiment 1, perceptual grouping distorted distance estimates across all three tasks. Interestingly, the effect of grouping by luminance was in the opposite direction to the effects of the remaining grouping types. We relate this to differences in the ability to inhibit perceptual grouping effects on distance estimates. Additive distorting influences were also observed in the drawing and the construction task, which are explained in terms of the points of reference employed in each task. Experiment 2 demonstrated that the above distortion effects are also observed in WS. Given the known deficit in the ability to use perceptual grouping in WS, this suggests a dissociation between the pre-attentive influence of and the attentive deployment of perceptual grouping in WS. The typical distortion in relation to drawing and construction points towards the presence of some typical location coding strategies in WS. The performance of the WS group differed from the TD participants on two counts. First, the pattern of overall distance estimates (averaged across interior and exterior distances) across the four perceptual grouping types, differed between groups. Second, the distorting influence of perceptual grouping was strongest for grouping by shape similarity in WS, which contrasts to a strength in grouping by proximity observed in the TD participants.     

Working memory and arithmetic calculation in children: the contributory roles of processing speed, short-term memory, and reading

The cognitive underpinnings of arithmetic calculation in children are noted to involve working memory; however, cognitive processes related to arithmetic calculation and working memory suggest that this relationship is more complex than stated previously. The purpose of this investigation was to examine the relative contributions of processing speed, short-term memory, working memory, and reading to arithmetic calculation in children. Results suggested four important findings. First, processing speed emerged as a significant contributor of arithmetic calculation only in relation to age-related differences in the general sample. Second, processing speed and short-term memory did not eliminate the contribution of working memory to arithmetic calculation. Third, individual working memory components--verbal working memory and visual-spatial working memory--each contributed unique variance to arithmetic calculation in the presence of all other variables. Fourth, a full model indicated that chronological age remained a significant contributor to arithmetic calculation in the presence of significant contributions from all other variables. Results are discussed in terms of directions for future research on working memory in arithmetic calculation.     

儿童句法意识与阅读能力发展的关系

文章总结了近几十年来关于句法意识与阅读能力发展关系的研究。首先概括了句法意识的含义及其研究方法,包括口头完形填空、句子判断和句子纠正、错误模仿、分析句法一致性效应和句法启动等,然后总结了70年代以来关于句法意识与阅读能力发展关系的理论及其实验证据,最后提出了有待进一步研究的问题     

小学生创造性科学问题提出能力的发展研究

运用实验的方法,对371名小学生创造性科学问题提出能力的发展进行了研究。结果表明:(1)小学生创造性科学问题提出能力整体呈上升趋势;(2)男女生的创造性科学问题提出能力发展趋势基本相同,男生整体上要略高于女生,差异不显著;(3)小学生创造性科学问题提出能力的学校类型差异主要表现在发展趋势上,城市小学二到三年级停滞不前,乡村小学则迅速发展,之后发展趋势相同;(4)三到四年级是小学生创造性科学问题提出能力发展的“关键期”。     

小学生数学应用题解题水平影响因素的研究——视空间能力、认知方式及表征方式的影响

研究采用3(年级)×2(场认知方式)×2(视空间能力水平)×3(问题表征方式)四因素混合实验设计,探讨了这四种因素对小学生数学应用题解题水平的影响。结果表明:年级、认知方式、空间能力以及问题表征方式均是影响小学生应用题解决水平的关键因素;问题表征方式、认知方式、空间能力以及年级四个因素对小学生解题水平存在交互作用,其中图形提示有利于场依存性学生解题水平的提高,低空间-场依存型的学生更适合图形提示;高空间-场依存型的学生随年级升高解题能力发展较快,而低空间-场依存型的学生解题水平提高较慢;随着年级的升高,图式表征对小学生问题解决的促进作用增强。     

情绪对职业决策的影响

职业决策是决策研究领域的重要课题,引起了心理学家和决策研究者的高度关注.本文在以往研究的基础上,引人情绪和职业种类变量探讨了情绪对职业决策的影响,结果显示:(1)无论是四种还是八种职业决策任务,积极情绪的被试同消极情绪的被试相比,信息搜索的时间较长,信息搜索的深度显著增加;(2)在职业选择策略上,积极情绪的被试更加倾向于基于选项的加工,而消极情绪的被试随着从四种职业决策任务到八种决策任务的转变,逐渐倾向于基于属性的加工;(3)情绪影响了决策者职业决策的信息加工能力.     

Opposing effects of age and reading ability on pseudoword priming

Repetition priming refers to the facilitation of stimulus processing due to prior processing of the same or similar stimulus, and is one of the most primitive ways in which experience and practice can affect performance. Previous studies have produced contradictory results regarding the stability of repetition priming across development. Drawing on models of word priming that suggest decreased priming with increased reading ability, the present experiment investigated the possibility that null effects of age in priming are due to opposing effects of age and reading ability on priming magnitude. Forty-eight participants between 7 and 22 years old read aloud primed and unprimed pseudowords, after completing a reading ability assessment. In line with predictions, the magnitude of priming for pseudowords increased with increased age when reading ability was controlled, and decreased with increased reading ability when age was controlled. Moreover, neither the age nor ability effect was significant when tested without the other. Results were not influenced by explicit memory for primed pseudowords. Thus, the present experiment provides evidence for developmental increases in word priming, as well as a potential explanation for the lack of developmental effects in previous studies.