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1. chinaXiv:201904.00089 [pdf]

发展性阅读障碍儿童阅读中的眼跳定位缺陷:基于新词学习的实验证据

梁菲菲; 马杰; 李馨; 连坤予; 谭珂; 白学军
Subjects: Psychology >> Cognitive Psychology

通过与生理年龄匹配儿童比较新词重复学习中眼跳定位模式变化的异同,探讨发展性阅读障碍儿童在新词学习中的眼跳定位是否存在缺陷。以发展性阅读障碍儿童和生理年龄匹配儿童为被试,采用重复学习新词范式,结果发现:(1)与生理年龄匹配组相比,发展性阅读障碍儿童跳入新词的眼跳距离较短、多次注视中的首次注视落点位置更靠近词首;(2)生理年龄匹配组儿童利用学习次数调节新词眼跳定位模式的能力高于发展性阅读障碍儿童,即随着新词学习次数的增加,生理年龄匹配组儿童跳入和跳出新词的眼跳距离随之增长,首次注视落点位置更靠近词中心;相比之下,发展性阅读障碍儿童仅在跳出新词的眼跳距离上有所增长,但增加幅度也显著小于生理年龄匹配组。结果表明,发展性阅读障碍儿童在新词学习中的眼跳定位,及利用学习次数对眼跳定位的调节上均表现出一定缺陷。

submitted time 2019-04-15 Hits2573Downloads191 Comment 0

2. chinaXiv:201904.00088 [pdf]

公平或是利益:权力对分配公平感的影响

孙倩; 龙长权; 王修欣; 刘永芳
Subjects: Psychology >> Applied Psychology

通过3个实验逐步考察了高、低权力个体对三种分配方案(公平/劣势不公平/优势不公平)的公平感。结果发现:(1)被试的公平评级从高到低依次为公平、优势不公平、劣势不公平,做出评级的反应时则从快到慢依次为公平、劣势不公平、优势不公平;(2)相对于低权力被试,高权力被试对劣势不公平分配的公平评级更低,而对公平分配和优势不公平分配的公平评级更高,且做出公平判断的反应时更短。基于这些结果,作者提出了公平与利益权衡的公平优先效应及权力的自我增强假设,以更好地理解权力和公平的本质及二者的关系。

submitted time 2019-04-15 Hits2381Downloads225 Comment 0

3. chinaXiv:201904.00091 [pdf]

Monitoring the Dynamics of Field-Saturated Soil Hydraulic Conductivity in a Wastewater Irrigated Cropland [V5].pdf

Siyi Zhang; Isaac Hopkins; Li Guo; Henry Lin
Subjects: Geosciences >> Geography

The maintenance of adequate hydraulic conductivity is a basic priority for the function and sustainability of long-term wastewater irrigated lands. An effective procedure to measure in situ hydraulic conductivity quickly, easily, and reliably is still elusive. This study aims to compare the performance of DualHead Infiltrometers, a novel instrument designed to measure field-saturated hydraulic conductivity (Kfs) quickly and in an automated fashion, with different parameters and old infiltrometer designs; and to investigate the dynamics of Kfs in a cropland that has been spray-irrigated with treated wastewater for fifty years. Our results showed that a modified procedure with a longer, single pressure cycle yielded results with lower coefficients of variation (CVs) for both pressures and infiltration rates, and performed better than the original procedure with two short pressure recycles. Kfs values measured by DualHead Infiltrometers were similar to those measured by double-ring infiltrometers in most conditions. Viscosity-corrected Kfs on irrigated croplands was 123.8±94.0 mm h-1, insignificantly higher than that on the non-irrigated croplands, 103.2±94.6 mm h-1. We observed seasonal variations in Kfs values between winter and summer conditions, but infiltration rates during all seasons remained much higher than the spray irrigation rate (4.25 mm h-1). Nevertheless, with CVs greater than 67%, caution must be exercised to ensure that hydraulic conductivity remains high enough to prevent runoff at all times, especially during winter frozen conditions.

submitted time 2019-04-15 Hits6620Downloads523 Comment 0

4. chinaXiv:201904.00078 [pdf]

效应量置信区间的原理及其实现

王珺; 宋琼雅; 许岳培; 贾彬彬; 胡传鹏
Subjects: Psychology >> Statistics in Psychology

在心理学可重复危机的背景之下,报告效应量及其置信区间正逐渐成为主流心理学界所要求的新标准,但是研究者可能对效应量的置信区间缺乏足够的理解。为增强研究者对效应量置信区间的理解及应用,本文介绍了心理学研究中最常用的效应量指标——Cohen's d与η²——的置信区间的基本原理,即,在备择假设(H1)为真时,需要通过迭代估计的方式来估计相应非中心分布的非中心分布参数,从而构建Cohen's d与η²的置信区间。其中Cohen's d对应的是非中心t分布;而η²对应的则是非中心F分布。使用现有的计算机程序,能够对Cohen's d与η²的置信区间进行计算,例如 R与JASP,本文对此进行了分别展示。报告效应量置信区间不仅有助于研究者更好地进行统计推断,也有利于整个科学界知识的积累,因此本文介绍的方法对研究者具有十分重要的意义。

submitted time 2019-04-15 Hits3164Downloads708 Comment 0

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