Reception of Morse code through motional, vibrotactile, and auditory stimulation

The potential for communication through the kinesthetic aspect of the tactual sense was examined in a series of experiments employing Morse code signals. Experienced and inexperienced Morse code operators were trained to identify Morse code signals that were delivered as sequences of motional stimulation through up-down displacements (roughly 10 mm) of the fingertip. Performance on this task was compared with that obtained for both vibrotactile and acoustic presentation of Morse code using a 200-Hz tone delivered either to the fingertip through a minishaker or diotically to the two ears under headphones. For all three modalities, the ability to receive Morse code was examined as a function of presentation rate for tasks including identification of single letters, random three-letter sequences, common words, and sentences. Equivalent word-rate measures (i.e., product of percent correct scores and stimulus presentation rate) were nearly twice as high for auditory presentation as for vibrotactile stimulation, which in turn was about 1.3 times that for motional stimulation. The experienced subjects outperformed the inexperienced subjects by amounts that increased with task complexity. For example, the former were able to receive sentences at 18 words/min with motional stimulation, whereas the latter, following 75 h of training, were unable to perform this task. The present results and those of other research with tactual communication systems are compared, particularly regarding estimates of information-transfer rates.     

Effect of response practice variables on learning spelling and sight vocabulary

Four experiments were conducted to examine variables associated with response practice as an instructional technique for individuals with intellectual disabilities. In Experiment 1, the effect of the cover component in the "cover write" method was evaluated, as were the comparative effects of written versus oral practice of spelling words by rehabilitation clients. The results showed that the cover procedure generally did not enhance performance over and above that produced by practice alone, and written practice generally was not superior to oral practice. Experiment 2 demonstrated that less response practice (i.e., five times) was as effective as more practice (i.e., 10 and 15 times) for teaching spelling to adolescents with developmental disabilities. Experiments 3 and 4 also showed that even less response practice (i.e., one time) was as effective as more practice (five times), and irrelevant practice following errors was as effective as relevant practice for teaching spelling and sight vocabulary to adolescents with behavior disorders and developmental disabilities, respectively. The findings suggest that a parsimonious procedure of limited response practice and positive reinforcement may be effective for the tasks and populations studied.     

气质与学业成就的相关及其机制的研究

该研究考察了３１６３名中小学生的气质与学业成就、人格特征的关系。结果说明：１．学业成就与情绪性、内外向性气质特征相关显著,多血质、多血,粘液质和多血－胆汁质是有利于学习的气质类型。２．气质与人格存在着相互依赖性,不同气质类型学生群体具有与其气质相应的典型人格特征。３．要重视学生的气质差异对其人格和学业成就的影响。     

中国人眼对非彩色系表色色差辨别的实验研究

报道了中国人眼对表色色差辨别的实验研究中非彩色系列实验研究结果,并与国外有关结果进行了比较。结果表明,非彩色的明度特性变化,对人眼色差辨别无显著影响,色差值仅随目视评价的感觉等级不同而异。此结果与国外有关报道的结果基本一致。实验结果为中国颜色体系的非彩色系颜色样品提出了色差宽容度：△Ｅ＜１．５。此色差宽容度已被全国颜色标准化技术委员会认定为ＧＳＢＡ２６００３—９４《中国颜色体系》国家标准中颜色样品色差宽容度的技术参数。     

初中生考试成绩归因模式研究

在广泛调查初中生对考试成绩的归因和情感反应的基础上,根据Ｗｅｉｎｅｒ的动机和情绪的归因理论,提出了初中生对考试成绩归因的假设模式,然后运用协方差结构模型的统计方法对这个假设模型进行了检验．虽然最初模型经ｘ２拟合度检验被拒绝,但经设定探查产生的最终模型较合适地拟合了数据,并部分支持了Ｗｅｉｎｅｒ的归因理论．按照这个模型,努力归因一内源性维度对初中生的自信心、期望、成就动机产生积极的影响．     

卒中部位及局部脑血流量对智力的影响

用长谷川智力测定量表法测定了１８９例卒中患者的智力,分析了病变部位、脑萎缩及局部脑血流量（ｒＣＢＦ）对智力的影响．其中６９例患者长谷川分数低于２１．５分．当病变位于左半球时,属痴呆或可疑痴呆者达４２．９％;而病变位于右半球时,仅２３．１％属痴呆及可疑痴呆．ｒＣＢＦ与长谷川分数之间的相关分析显示：左额、右颞及左顶叶的ｒＣＢＦ与长谷川分数呈极显著正相关．提示左半球在智力活动中起主导作用．脑萎缩亦是影响智力的因素．     

短时距知觉中的面积效应

初步探讨了短时距（１─５ｓ）下时距刺激的面积大小和立体框架大小对时距知觉的影响及其成因。结果表明：刺激的面积大小对短时距知觉的影响极其显著;存在两种不同反应类型的被试─－大小依存者与非大小依存者,在不同反应类型的被试中刺激的立体框架大小对短时距知觉的影响不同,刺激的立体框架大小对大小依存者的短时距知觉的影响极其显著,但对非大小依存者的影响不显著。     

大脑机能一侧化和表意文字符号的认读

本实验在速示条件下探讨认读作为表意文字符号的汉字和阿拉伯数字时,视野(大脑半球)一侧化问题。实验结果表明,单个阿拉伯数字不表现出大脑一侧化;单侧视野呈现汉字或双字词以及双侧视野同时分别是现汉字和阿拉伯数字时,表现出右视野(左半球)认读的正确率显著的高;在双侧同时分别呈现双字词和数字以及中央视野与单侧视野同时呈现汉字时,左右视野差别虽不显著,但仍表明左半球在汉字、词的认读中起主要作用。     

3-6岁儿童颜色及图形视觉辨认实验研究

本研究对120名学前儿童(3—6岁)进行了12种颜色和12种图形的辨认实验。实验刺激用速示器分三种速度(0.01秒、0.05秒、0.1秒)呈现。结果表明:呈现速度对辨认正确率有着明显的影响。3—6岁儿童对颜色和图形的辨认能力均随年龄增长而逐步提高。学前儿童对颜色的辨别,在三种呈现速度条件下,均以对黄、红、绿三色的辨认正确率为最高;对图形的辨认在不同呈现速度条件下出现优势与劣势图形之分。优势图形正确辨认百分比较高,而劣势图形则较低,这种优劣势图形的产生可能与图形的空间结构特性及进行言语“句子化”编码的难易有着密切关系。