英语语音意识在汉语儿童英语单词阅读及拼写中的作用

本研究考察了英语语音意识在小学汉语儿童英语单词读写学习中的作用。对189名小学儿童的研究表明:(1)一、二、五年级在首音和韵脚意识上差异显著;在音位意识上,一、二年级差异不显著,五年级显著高于其他两个年级;(2)各年级儿童的语音意识与其英语单词读写均存在显著相关;(3)控制英语口语词汇量后,一年级的首音意识显著解释其单词读写的变异,二年级的首音意识显著解释其单词拼写的变异,五年级的音位意识显著解释其单词读写的变异;(4)各年级的语音意识对单词拼写较之于阅读都具有更强的变异解释力。可见,小学汉语儿童的英语语音意识与其单词读写存在密切联系,语音意识与拼写的关系相对更为紧密;首音意识对早期读写发展具有重要意义,而音位意识在后期读写学习中的作用更为突出。     

汉语短时序列回忆中的语音相似性和视觉相似性效应

语音相似性效应和视觉相似性效应是短时序列回忆中的两个典型性效应, 但前人很少探讨这两种效应的交互作用。本研究利用汉语字形和语音的属性, 观察汉字短时序列回忆中语音相似性效应、视觉相似性效应及两者的交互作用。研究结果发现当回忆项目在语音或视觉上单纯相似或不相似时, 视觉相似性效应及其与语音相似性的交互作用与混合词表条件下所发现的结果有很大的不同。这个研究结果为丰富和补充相关理论模型提供了进一步实证依据。     

SENSITIVITY OF CONDITIONAL-DISCRIMINATION PERFORMANCE TO WITHIN-SESSION VARIATION OF REINFORCER FREQUENCY

The present experiment developed a methodology for assessing sensitivity of conditional-discrimination performance to within-session variation of reinforcer frequency. Four pigeons responded under a multiple schedule of matching-to-sample components in which the ratio of reinforcers for correct S₁ and S₂ responses was varied across components within session. Initially, five components, each arranging a different reinforcer-frequency ratio (from 19 to 91), were presented randomly within a session. Under this condition, sensitivity to reinforcer frequency was low. Sensitivity failed to improve after extended exposure to this condition, and under a condition in which only three reinforcer-frequency ratios were varied within session. In a later condition, three reinforcer-frequency ratios were varied within session, but the reinforcer-frequency ratio in effect was differentially signaled within each component. Under this condition, values of sensitivity were similar to those traditionally obtained when reinforcer-frequency ratios for correct responses are varied across conditions. The effects of signaled vs. unsignaled reinforcer-frequency ratios were replicated in two subsequent conditions. The present procedure could provide a practical alternative to parametric variation of reinforcer frequency across conditions and may be useful in characterizing the effects of a variety of manipulations on steady-state sensitivity to reinforcer frequency.     

小学儿童语音意识与汉语拼音能力的关系

探讨了小学一、三、五年级儿童汉语和英语语音意识与汉语拼音水平的关系。结果发现 ,无论是汉语还是英语语音意识都与汉语拼音水平有显著的相关 ;拼音水平高与低组儿童在汉语和英语语音意识上差异显著 ;汉语拼音成绩较高地预测了汉语语音意识的水平 ,而对英语语音意识没有预测力。     

语音训练对幼儿英语语音意识和字母知识的促进

语音意识是影响英语阅读能力的关键因素。本研究结合语音教学法的思想,采用自编的教学材料和语音游戏,通过字母故事和语音训练游戏,训练儿童的语音意识。研究者在北京市一所普通幼儿园选取了无英语学习经验的3岁左右中国幼儿63名,随机分为实验组和控制组,经过8周的语音教学实验,发现接受语音教学的实验组儿童在音节意识、音韵意识、音素意识和字母识别等方面较接受普通英语教学的控制组都有显著提高。结果表明早期有针对性的语音训练可能能够更快地提高幼儿的语音意识。     

THE EFFECTS OF VARIED VERSUS CONSTANT HIGH‐, MEDIUM‐, AND LOW‐PREFERENCE STIMULI ON PERFORMANCE

The purpose of the current study was to compare the delivery of varied versus constant high‐, medium‐, and low‐preference stimuli on performance of 2 adults on a computer‐based task in an analogue employment setting. For both participants, constant delivery of the high‐preference stimulus produced the greatest increases in performance over baseline; the varied presentation produced performance comparable to constant delivery of medium‐preference stimuli. Results are discussed in terms of their implications for the selection and delivery of stimuli as part of employee performance‐improvement programs in the field of organizational behavior management.     

Inter-species variation in colour perception

Inter-species variation in colour perception poses a serious problem for the view that colours are mind-independent properties. Given that colour perception varies so drastically across species, which species perceives colours as they really are? In this paper, I argue that all do. Specifically, I argue that members of different species perceive properties that are determinates of different, mutually compatible, determinables. This is an instance of a general selectionist strategy for dealing with cases of perceptual variation. According to selectionist views, objects simultaneously instantiate a plurality of colours, all of them genuinely mind-independent, and subjects select from amongst this plurality which colours they perceive. I contrast selectionist views with relationalist views that deny the mind-independence of colour, and consider some general objections to this strategy.     

The extent of active processing of a long-duration stimulus modulates the scalp-recorded sustained potential

A long-duration stimulus will elicit a negative sustained potential (SP) that is maximum in amplitude over fronto-central areas of the scalp. This study examines how the duration of active attentional processing of the stimulus might also elicit a nonsensory contingent negative variation (CNV) that overlaps and summates to the SP. Subjects were presented with either a low- or high-pitched 1.4s duration stimulus. In different conditions, a 20 ms gap occurred either 300 or 1300 ms after stimulus onset in half the stimuli. The subject's task was to button press upon detection of the gap in the low-pitched stimulus. The subject was not required to respond to the gap occurring in the high-pitched tone. In a separate Ignore condition, subjects ignored all stimuli and read a book. In the Ignore condition, a SP was apparent to the long-duration stimuli. In the Attend condition, a large amplitude slow wave, probably the CNV, overlapped and summated with the SP. The extent of the overlapping CNV was dependent on whether the gap occurred early or late. The CNV was not apparent following presentation of the high-pitched tone, when the gap did not need to be detected. Consistent with previous studies, a SP was thus elicited even when active processing of the stimulus was not required. The morphology of the scalp-recorded SP was, nevertheless, much modified by an overlapping and summating CNV, depending on the extent to which active processing of the long-duration stimulus was required.