Differences in influence between pitched-from-vertical lines and slanted-from-frontal horizontal lines on egocentric localization

The visual field exerts powerful effects on egocentric spatial localization along both horizontal and vertical dimensions. Thus, (1) prism-produced visual pitch and visual slant generate similar mislocalizations of visually perceived eye level (VPEL) and visually perceived straight ahead (VPSA) and (2) in darkness curare-produced extraocular muscle paresis under eccentric gaze generates similar mislocalizations in VPEL and VPSA that are essentially eliminated by introducing a normal visual field. In the present experiments, however, a search for influences of real visual slant on VPSA to correspond to the influences of visual pitch on VPEL failed to find one. Although the elevation corresponding to VPEL changes linearly with the pitch of a visual field consisting of two isolated 66.5°-long pitched-from-vertical lines, the corresponding manipulation of change in the slant of either a horizontal two-line or a horizontal four-line visual field on VPSA did not occur. The average slope of the VPEL-versus-pitch function across 5 subjects was +0.40 over a ±30° pitch range, but was indistinguishable from 0.00 for the VPSA-versus-slant function over a ±30° slant range. Possible contributions to the difference between susceptibility of VPEL and VPSA to visual influence from extraretinal eye position information, gravity, and several retinal gradients are discussed.     

与年龄相关的认知速度减慢及学习改善过程

该工作应用人机对话方式完成心算、符号数字、数字鉴别和计数四项作业认知速度年老减慢及学习改善过程的研究,被试３５０人,４６—７５岁。研究结果表明：四项认知作业速度随年老进行性减慢;然而,老年人经学习训练认知作业速度可明显改善。上述变化程度与作业所需时间有密切关系,提示年老过程中枢信息加工过程速度的减慢快于外周感觉─运动过程速度的减慢,学习改善作用也可能主要是中枢过程速度的提高。     

成人脑涨落图年龄变化特点的研究

该工作研究了１２０名２０－７９岁正常成人脑涨落图的年龄变化特点。结果表明：（１）从２０岁到５０岁,Ｓ系谱线活动向低频方向集中,６０岁后谱线又向高频方向有所移动;（２）部分谐振系的随龄变化表现明显,其中以Ｓ１７系变化最为敏感;（３）脑区间相干活动和各脑区的连频活动随年龄增强,脑能量分布的有序性逐渐破坏;（４）增龄性变化主要反映在优势脑区（左前脑）和优势脑轴（左前／右后脑）上,与脑高级机能活动密切相关的左前脑的退行性变化最为明显。上述结果反映了脑功能的减退是一个非线性的多层次的复杂过程。     

时序信息提取机制的探索

对时序信息加工的经典研究是采用新近性判断范型,结果发现其提取机制是以新近性为基础的逆向串行搜索过程。本研究采用新近性判断范型和早远性判断范型对时序信息的提取机制进行了深入的考察,结果表明：（ｌ）提取时序信息既存在逆向串行搜索,又存在顺向串行搜索;（２）早远性判断和新近性判断任务对不同部分时序信息恢复的效应不同,其中早远性判断易化早远部分,新近性判断易化新近部分──表现为对相应部分辨别力的提高和正确反应潜伏期的缩短;（３）在不同的时序信息提取任务中,被试会根据具体条件进行反转反应。     

The temporal structure of spoken sentence comprehension in Chinese

Three experiments with 60 native Chinese speakers were conducted to examine the temporal structure of spoken sentence comprehension in Chinese. In the two sentence-gating experiments, listeners heard sentence fragments of various sizes, either successively or individually, and decided on the agent role of the sentence. In the agent-naming experiment, listeners repeated aloud the sentence agent upon hearing the sentence. Converging evidence was derived from these experiments indicating the usefulness of sentence gating in tapping into the temporal structure of comprehension and in evaluating listeners’ comprehension on the basis of partial information. Results from these experiments show that partial sentence information plays a very important role in Chinese sentence comprehension, and that Chinese listeners integrate incomplete and ungrammatical sentence fragments by reference to complete and grammatical models in the language. It is argued that these processing characteristics reflect properties of the Chinese language in which few morphological, grammatical, and syntactic constraints are placed on the relationships between sentence constituents.     

父母低头行为对儿童青少年心理发展的影响

父母低头行为是指父母照顾或与孩子交流时,过分关注与使用手机而忽视孩子的行为。梳理相关研究发现,父母低头行为会对孩子产生多种不良影响,如,降低亲子关系交流质量、增加意外伤害风险、损伤人际交往能力、导致问题行为增多。现有研究采用取代假说、多任务操作理论以及依恋理论对影响过程进行解释。未来研究的关键在于邻近概念的区分、测量方式和研究方法的改进、探讨儿童对父母手机使用行为的看法以及移动设备对亲子互动可能的积极影响。     

快速眼动相(REM)睡眠剥夺对大鼠记忆巩固的影响

本实验应用小站台水环境技术剥夺大鼠快速眼动相(REM)睡眠,比较了在学习后不同时间剥夺REM睡眠对记忆巩固的影响异同,结果证明:大鼠在学习后,立即剥夺REM睡眠24小时对记忆巩固明显不利;如在立即剥夺REM睡眠24小时后再让其恢复自由睡眠24小时,记忆成绩无明显改善;学习后允许自由睡眠24小时对记忆巩固明显有利;如在自由睡眠24小时后再行REM睡眠剥夺24小时,记忆成绩仍保持良好。说明学习后一段时间自由睡眠对于记忆的巩固是重要的,剥夺REM睡眠对于记忆的巩固明显不利。     

5—13岁儿童空间认知发展的研究——判别相等面积的再探

本实验是《5—11岁儿童两种空间关系认知发展的实验研究》的继续,但将内部被占面积改为圆形。结果表明:儿童判别面积从直觉判断发展到推理判断之间经历一种过渡形态。表现为,在同一判别中直觉和推理活动交错;能将被占面积各部分整合成整体,但对剩余面积部分的判别受直觉因素束缚;理解等量减等量所余相等原理,但不能用来解决面临的课题等四种形式。完成这种过渡需要解决三个相互联系的问题。也再次证明儿童判别面积这种空间认知发展,在一定年龄范围存在着阶段性特点,同时儿童这种认知能力的显露程度又以课题条件难易为转移。     

4-6岁儿童认知发展过程中直接认知成分与间接认知成分相互关系的研究

本实验是分析学前儿童认知过程中三种不同的条件(实物、照片、语言指示)对儿童计数、操作和比较活动的影响,探讨认知的各直接成分和各间接成分的关系在儿童认知发展中的作用;并了解3—6岁儿童在三种认知活动中的特点。     

豚尾猴(Macaca nemestrina)等灵长类动物反转学习的比较研究

不同种类猿猴脑高级机能的比较生理心理研究的资料很少,并且意见不完全一致。和(1997)曾报道黑猩猩较阿拉伯狒有较大的推断能力。Shell和Riopelle(1958)报道阔鼻猴蜘蛛猴(Ateles geoffroyi),卷尾猴(Cebus albifrons)