从中西医学的竞争和渗透谈现代中医临床思维的变革

现代中医的临床思维正在发生着变革,一个以辨病为纲,辨证为目,辨病论治为经,辨证论治为纬的临床思维新模式,已经呼之欲出。这正是２１世纪中医学发展的必由之路,学术界必从唯物辩证法的角度来审视这场变革,并因其势而利导之。     

Temporal differentiation of response duration in children of different ages: developmental changes in relations between verbal and nonverbal behavior.

Children aged 4.5, 7, or 11 years received an experimental session in which a contingency was placed on button-press duration. Each discrete trial was followed by a brief verbal probe asking a question about the contingency requirement. Other groups of children received an identical task followed by a postexperimental interview. Level of adaptation to the duration contingency tended to increase with age in subjects receiving posttrial verbal probes, but not for those who were interviewed. Eleven-year-olds in the verbal probe condition showed a strong correlation between accurate temporal differentiation and number of verbalizations relating to response duration or timing. The younger subjects, with one exception, showed no association between timing-related verbalizations (which were almost totally absent) and response duration differentiation. This developmental difference occurred even though the younger subjects verbalized after almost every trial. The results suggest that although 11-year-old children apparently produce rule-governed behavior under verbal control as adults do, the behavior of younger children may be controlled directly by reinforcement contingencies even when their verbal repertoires are highly developed.     

Differential ordering of objects and attributes

By reference to nominated attributes, a genus, being a population of objects of one specified kind, may be partitioned into species, being subpopulations of different kinds. A prototype is an object representative of its species within the genus. Using this framework, the paper describes how objects can be relatively differentiated with respect to attributes, and how attributes can be relatively differentiating with respect to objects. Methods and rationale for such differential ordering of objects and attributes are presented by example, formal development, and application.For a genus comprisingn species of object there is a subsetP ofn distinct prototypes. With respect tom nominated attributes, each object in has anm-element characterization. Together these determine ann ×m objects × attributes matrix, the rows of which are the characterizations of the prototypical objects. Over then species in , an associated relative frequency vector gives the distribution of objects (and of their characterizations). The matrix and vector associate the objects in with points in a metric space (P, ); and it is with respect to various sums of distances in this attribute space that one can differentially order objects and attributes.The definition of the distance function is generalized across kinds of difference, types of characterization, scale-types of measurement, Minkowskiindex 1, and any form of distribution of objects over species. Explanatory and taxonomic applications in psychology and other fields are discussed, with focus on classification, identification, recognition, and search. The Braille code and the identification of its characters provide illustration.An anticipation and some preliminary indications were given in Sutcliffe and Bristow (1966), Sutcliffe (1972, 1973), and Nowakowska (1975). Subsequently the ideas have been extended and their applications realized in a computer program which, in its development, has so far gone through many minor and three major revisions to its present form in Sutcliffe (1985). The foregoing provided the foundation for the empirical applications and for the presentation in this paper of the ideas in their general form. the research has been supported by funds from the University of Sydney Research Grant and from the Australian Research Grants Scheme. In the working out and exposition of the ideas I have very much benefited from constructive critical comment given by C. R. Latimer, J. B. Michell, G. Oliphant, and E. Seneta, and from the professional programming skills of Michael Wilson and David Shillito. I am grateful for the invitation and the facilities for writing extended during 1983 by Georges Noizet, Laboratoire de Psychologie Expérimentale, Université René Descartes, Paris V, and by Samuel Messick, Vice President for Research, E.T.S. Princeton, N.J. Finally, I acknowledge the improvements in presentation of this paper which have arisen from the editor's and reviewers' comments.     

Response-reinforcer contingency and spatially defined operants: testing an invariance property of phi

A chamber containing 72 response keys defining the circumference of a circle 1 m in diameter was used to examine the relation between differentiation of response location and a measure of response-reinforcer contingency known as the phi coefficient. A different target key was specified in each successive phase, and response location was differentiated with respect to the target. Criterional and noncriterional responses (i.e., responses "near" and "far" from the target) were defined using targeted percentile schedules to control the overall probability of each response class. By manipulating criterional (and, hence, noncriterional) response probability and the reinforcement probabilities conditional on each, a mathematical invariance property peculiar to phi in contingency analysis was examined. Specifically, diagonally interchanging cell frequencies in a 2 x 2 table relating criterional/noncriterional responses to reinforcement/nonreinforcement leaves phi unchanged. Hence, the degree of response differentiation predicted by phi remains unchanged under the four permutations implied by the various diagonal interchanges. This predicted invariance was examined under values of phi equal to .33, .58, and .82. Increasing phi generally increased the stereotypy of response location. Three of the permutations generated almost interchangeable performance at different phi values. The remaining permutation, however, generated functions relating response concentration to phi with slopes shallower than those obtained under the other permutations. This resulted from relatively higher levels of differentiation, compared to the other permutations, at low phi values. These data strongly suggest boundary conditions on the ability of phi to reflect completely the local processes that are indexed by phi at a molar level.     

Delayed N2 response in Go condition in a visual Go/Nogo ERP study in children who stutter

Purpose of the studyThe main aim of the study was to investigate the attentional and inhibitory abilities and their underlying processes of children who stutter by using behavioural measurement and event-related potentials (ERP) in a visual Go/Nogo paradigm.MethodsParticipants were 11 children who stutter (CWS; mean age 8.1, age range 6.3–9.5 years) and 19 typically developed children (TDC; mean age 8.1, age range 5.8–9.6 years). They performed a visual Go/Nogo task with simultaneous EEG recording to obtain ERP responses.ResultsResults showed that CWS had longer N2 and P3 latencies in the Go condition compared to the TDC. In contrast, the groups did not differ significantly in the Nogo condition or behavioural measures.ConclusionsOur findings did not confirm less efficient inhibitory control in CWS but suggest atypical attentional processing such as stimulus evaluation and response selection.Educational Objectives: The reader will be able to (a) describe recent findings on attention and inhibitory control in children who stutter, (b) describe the measurement of attentional processing, including inhibitory control, and (c) describe the findings on attentional processing in children who stutter as indexed by the event-related potentials in a visual Go/Nogo paradigm.     

人际距离影响疼痛共情:朋友启动效应

"人类如何体验朋友或陌生人的痛苦?"为了研究人际距离对疼痛共情的影响及其神经机制,记录了14名健康大学生完成启动范式下疼痛共情任务时的脑电数据,分析朋友/陌生人启动条件下的ERP成分。研究发现人际距离对共情的早期自动加工(N1)和晚期控制加工(P3)过程都有影响。朋友启动条件下的N1显著小于陌生人启动条件,说明N1具有情绪分享作用,与陌生人相比人们在分享朋友的情绪情感时,由于共情相关神经网络的激活扩散导致了N1成分的减弱。朋友启动条件下的P3显著大于陌生人启动条件。另外,溯源分析发现在600~700 ms时程内发现朋友启动条件下颞上回存在更强激活。这说明人际距离因素增强了对共情中知觉线索的有意识加工与社会认知评价过程。     

Liking, Arousal Potential, and the Emotions Expressed by Music

Previous research indicates that the specific emotions expressed by stimuli may be closely associated with their pleasing and arousing qualities, and this parallels psychomusicological research on the relationship between these two stimulus qualities. In light of this, the present research contends that the emotions expressed by musical stimuli are associated with their pleasing and arousing qualities. Sixty subjects rated 32 musical excerpts on 11-point scales representing the expression of eight specific emotions. Statistical analyses showed that these emotion ratings were predictable on the basis of 60 additional subjects' ratings of each excerpt in terms of 'liking' and 'arousal potential'. This indicates that ratings of liking and arousal potential are essentially similar to ratings of the specific emotions expressed by musical stimuli. These results are discussed in terms of the relationship between liking and arousal potential, and the implications that this may have for research on affective processes.     

Time limits for completing fixed ratios. IV. Components of the ratio

Pigeons received food after completing a fixed ratio if the temporal properties of responding exceeded minimum duration requirements. In one set of conditions, a minimum time had to elapse before the first response of the ratio (the initial pause). In another set, the minimum duration was the time between the first and last response of the ratio. Obtained times increased as a power function of required times in both conditions. The power function resembled that occurring in experiments involving temporal differentiation of individual responses, interresponse times, latencies, and entire fixed-ratio sequences. Moreover, in all of these experiments individual performances could be described as a function of the base duration (the duration occurring in the absence of temporal requirements) and the specific time requirement. Control conditions indicated that the effects resulted from temporal requirements and not from reinforcer intermittency.     

儿童基于心理本质论的种族认知及其影响因素

心理本质论将类别成员视为由共同的本质所决定,且这些本质对应着一些表面的不可改变的属性。其中,种族本质论就是心理本质论的一种。研究种族本质论的发展对于了解儿童的种族认知具有重要意义。种族本质论者认为,种族具有遗传不变性、有较强的归纳强度和标签具有客观性等特征。但是,基于不同特征的种族本质论的发展存在差异。类属语言、社会文化背景和群体地位,均可能影响儿童种族本质论的发展。这些影响因素提示,可通过减少类属语言的描述和促进民族融合等方式改变儿童的种族本质论。比较儿童对种族本质论的建构与自然世界的建构之间的差异,方便我们探索类别学习跨领域的一致性问题。如何确保种族本质论的发展是适宜的,这需要未来开展一些干预性的研究。     

Shaping the location of a pigeon's peck: effect of rate and size of shaping steps.

For several pigeons, pecking at particular locations within a ten-inch-wide response area was reinforced by grain presentations. The reinforced locations changed systematically to "shape" response location back and forth across the area. The rate and size of these shifts in reinforced locations were varied in both between-subject and within-subject comparisons to evaluate the influence of these variables on the shaping process. Larger step sizes produced larger shifts in location for all sizes inspected, with all sizes from .5 to 3.0 inches effective in shaping behavior. More rapid steps were approximately as effective as slower steps for all rates of shift inspected from 25 reinforcers to 400 reinforcers per step. These data suggest that shaping peck location proceeds most efficiently with rapid, relatively large shifts in criterion performance.