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211.
We examined the effects of receptive speech on the acquisition of manual signing among three mentally retarded children. In an alternating treatments design, we compared the acquisition of expressive signs that were, versus were not, in a child's receptive vocabulary. The children were trained via total communication in which pictorial referents were named during sign training. Signs corresponding to known words were generally acquired faster and retained better than signs corresponding to unknown words. We conducted posttests to assess the stimulus control of signing and any changes in expressive and receptive signing and speech. Observed changes in performance could be accounted for by attention to aspects of the stimulus complex during training and functional equivalence of stimuli established by training. 相似文献
212.
Philip Peltzman Phillip J. Goldstein Robert Battagin Bob Markevitch 《Behavior research methods》1973,5(5):395-399
A simple EEG electrode for Intrauterine use In the human fetus is described. The stainless steel screw electrode possesses low noise characteristics, is constructed from commercially available material, and is easily attached to the fetal head during labor. Principles of optical signal analysis as an improved method of spectral analysis of the fetal EEG are also presented. The optical system provides visual display and hard copy output of the fetal EEG. 相似文献
213.
Two methods of training autistic children to use manual signs were compared. Two children, one mute and one capable of some verbal imitation, were taught to use signs as expressive labels for pictures of objects. Using an alternating treatments design, speed of sign acquisition was compared across two training conditions in which signs were presented either accompanied by, or without, the corresponding verbal label. In both conditions, the training procedure incorporated reinforcement, modeling, prompting, fading, and stimulus rotation. The efficacy of training in both treatment conditions was demonstrated by the use of a multiple baseline control across signs, but no clear differences in acquisition speed across conditions were apparent. Posttests conducted to assess stimulus control of signing, and learning of verbal labels when these were present in training, showed that the behavior of the imitative, but not the mute, child was controlled by the verbal stimuli. The implications of the results both for understanding deficits characteristic of autistic children and for developing appropriate language training procedures are discussed. 相似文献
214.
Bob Pepperman Taylor 《Journal of social philosophy》1994,25(1):46-64
In a famous passage from "Slavery In Massachusetts," Thoreau writes, "The remembrance of my country spoils my walk. My thoughts are murder to the State, and involuntarily go plotting against her."1 Here is Thoreau the anarchist, the misanthrope, the self-righteous angry young man, as he is so often portrayed in the secondary literature. It would be easy to consider the issue resolved: the conventional wisdom about Thoreau's misanthropy and anarchism are demonstrated, and there is little more to say. It would also be a significant mistake—one that has been made over and over again by commentators on both his political views and his nature writings. Thoreau's comment is not the climax of "Slavery in Massachusetts," but rather is the prelude to the climax. Consider the passage that follows and leads to the conclusion of the essay: 相似文献
215.
Pursuit tracking, a perceptual motor-skill task, has had wide application in many areas of psychology. The task is usually administered with a mechanical device in which subjects try to maintain a contact between a stylus and a disk on a rotating platter. A pursuit-tracking task that can be administered on a Macintosh computer is described. Subjects try to keep a crosshair cursor on top of a moving circular target. The cursor can be controlled by commonly used Macintosh ADB devices such as a joystick. The computer version has several important advantages: it offers more task flexibility and more accurate dependent measures of performance, and it is inexpensive. 相似文献
216.
Daniel B. Willingham 《Memory & cognition》1999,27(3):561-572
Many reports have indicated that implicit learning of sequences in a choice response time task is primarily perceptual; subjects learn the sequence of stimuli rather than the sequence of motor responses. Three experiments tested whether implicit motor sequence learning could be purely perceptual: no support was found for that hypothesis. Subjects who merely watched stimuli did not learn the sequence implicitly (Experiment 1), and sequence learning transferred robustly to a different set of stimulus cues (Experiment 2). In the final experiment, the stimulus-response mapping was changed at transfer so that one group of subjects pushed the same sequence of keys but saw new stimuli, whereas another group pushed a different sequence of keys but saw the same stimuli. Transfer to the new mapping was shown only if the motor sequence was kept constant, not the perceptual sequence. It is proposed that subjects learn a sequence of response locations in this and similar tasks. 相似文献
217.
218.
Bob Brecher 《Res Publica》2000,6(3):337-341
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Nissen and Bullemer (1987) reported that implicit motor sequence learning was disrupted by the addition of a secondary task. They suggested that this effect was due to the attentional load that the secondary task adds. Recently it has been suggested that the attentional load is not critical, but rather that the secondary task affects timing, either by lengthening or by making inconsistent the response-tostimulus interval (RSI)-that is, the delay between when a subject makes a response and when the next stimulus appears. In six experiments we manipulated the RSI and found no support for these two hypotheses. An inconsistent RSI did not adversely affect implicit motor sequence learning. A long RSI did not affect learning, although under some conditions subjects did not express learning if the RSI was long. These results are interpreted as reflecting the effects of attention. 相似文献
220.
In 2 experiments, the role of brand attributes in the process of nonconscious hierarchization in dyadic interactions was examined. Experiment 1 showed that in same-sex dyads, brands that are associated with an agent and that are rated high on the brand personality dimension of competence ( Aaker, 1997 ) induced patterns of nonverbal submissive behavior on the part of the interaction partner. This effect was more pronounced for individuals with a low intrinsic tendency for dominant behavior. Experiment 2 extended these findings to mixed-sex dyads and brands that varied in overall status. Moreover, participant gender moderated the effects, such that the impact of brand status on hierarchization behavior and on agent likability was more pronounced for women than for men. 相似文献