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31.
32.
The purpose of the current study was to explore the use of overt and covert self-rules in the acquisition, maintenance, and generalization of a chained task by adults with mild developmental disabilities. This research differed from previous research in that the experimenter did not deliver reinforcement for correct responses during training, and we examined the correspondence between each self-rule statement and each subsequent response on each trial. Results showed that the self-rules participated in control over participants' responding, in that the skill was acquired and shown to generalize in the absence of experimenter-delivered reinforcement. Moreover, performance was shown to deteriorate when the emission of overt, but not covert, self-rules was blocked. 相似文献
33.
他人的注视线索可诱导观察者将注意自动地转移到该线索所指示的方向上去(注视追随), 但仍不清楚注视方向的知觉在注视追随中起到何种作用。本研究结合注视适应和注视线索提示范式发现:知觉到的注视线索角度越大, 其线索提示效应越强; 知觉适应后被试判断注视方向的准确性下降, 注视线索引起的注意转移量显著减少。可见, 对注视方向的知觉能直接影响注视追随行为, 而注视方向抽取受到刺激显著性(注视角度)和知觉适应等因素的调节。这提示:在意识状态下, 注视知觉与注视追随存在直接联系, 即可能存在从注视知觉系统到注意转移系统的皮层加工通路; 注视追随并非纯粹的反射式加工, 它受自上而下知觉经验的调节。 相似文献
34.
Gaze following allows individuals to detect the locus of attention of both conspecifics and other species. However, little
is known about how this ability develops. We explored the emergence of bobwhite quail hatchlings’ ability to track human gaze
by assessing their avoidance behavior in an open arena under five testing conditions: (1) a Direct Gaze condition, in which
an experimenter looking down was positioned above one of two approach areas; (2) a Gaze Follow condition in which an experimenter,
positioned equidistant between two approach areas, directed his/her gaze towards one of the areas; (3) a Masked Gaze Follow
condition, in which the experimenter wore a mask during the Gaze Follow test; (4) a Deprived Face Experience condition, in
which hatchlings were deprived of experience with human faces prior to the Gaze Follow test; and (5) a Control condition in
which no experimenter was present during testing. Results revealed that hatchlings from the Direct Gaze condition preferred
the non-gazed approach area at all ages tested. Hatchlings from the Gaze Follow condition preferred the non-gazed approach
area at 48 and 72 h, but not at 24 h of age. In contrast, hatchlings from the Masked Gaze Follow, Deprived Face and Control
conditions did not prefer either approach area at any age tested. These results indicate that experience with human faces
plays a key role in the rapid emergence of gaze following behavior in bobwhite quail hatchlings. 相似文献
35.
Shoji Itakura 《Animal cognition》2001,4(3-4):281-284
The goal of this study was to examine the effect of joint visual attention on infants' behavior during subsequent events.
Thirty-seven mother-infant (aged from 9 to 13 months) pairs were twice shown a pair of line drawing stimuli on a computer
screen. For the control group, the mother never paid attention to the stimuli. For experimental group 1, the mother pointed
to one stimulus in the first presentation but did not point to it in the second presentation. The infants gazed longer at
the stimulus pointed to by their mothers in the first presentation. In the second presentation, during which mothers did not
attend to the stimuli, infants gazed longer at the stimulus which had been pointed to by the mothers in the first presentation.
In experimental group 2, one of two stimuli blinked during the first presentation but not the second presentation. Infants
gazed for longer at the blinking stimulus in the first presentation, but there was no difference in looking time toward the
two stimuli in the second presentation. These results suggest that joint visual attention affects infants' looking behavior
during subsequent events, and that simple stimulus change does not.
Accepted after revision: 2 May 2001
Electronic Publication 相似文献
36.
37.
Visual discriminative control of the behavior of one rat by the behavior of another was studied in a two-compartment chamber. Each rat's compartment had a food cup and two response keys arranged vertically next to the clear partition that separated the two rats. Illumination of the leader's key lights signaled a “search” period when a response by the leader on the unsignaled and randomly selected correct key for that trial illuminated the follower's keys. Then, a response by the follower on the corresponding key was reinforced, or a response on the incorrect key terminated the trial without reinforcement. Accuracy of following the leader increased to 85% within 15 sessions. Blocking the view of the leader reduced accuracy but not to chance levels. Apparent control by visual behavioral stimuli was also affected by auditory stimuli and a correction procedure. When white noise eliminated auditory cues, social learning was not acquired as fast nor as completely. A reductionistic position holds that behavioral stimuli are the same as nonsocial stimuli; however, that does not mean that they do not require any separate treatment. Behavioral stimuli are usually more variable than nonsocial stimuli, and further study is required to disentangle behavioral and nonsocial contributions to the stimulus control of social interactions. 相似文献
38.
The influence of instructions and feedback from an experimenter on observational recordings of disruptive behavior was evaluated. Four subject-observers recorded four categories of disruptive behavior from videotapes of children in a classroom setting. Two sets of videotapes, labelled "baseline" and "treatment", were matched for rates of disruptive behavior in each category. The observers were told that two target behaviors were expected to decrease and the other two control behaviors were not expected to change during the treatment condition. During observational recording of treatment videotapes, the observers were given positive feedback when they reported decreases in the two target behaviors, and negative feedback when they reported either to change or increases in the two control behaviors. The target behaviors were recorded less frequently by observers, while recordings of control behaviors were unaffected during the treatment phase. These results suggest that contingent feedback to observers should be avoided as a possible source of bias in behavioral recordings. 相似文献
39.
Instructed versus shaped human verbal behavior: Interactions with nonverbal responding 总被引:7,自引:7,他引:0
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Catania AC Matthews BA Shimoff E 《Journal of the experimental analysis of behavior》1982,38(3):233-248
Undergraduate students' presses on left and right buttons occasionally made available points exchangeable for money. Blue lights over the buttons were correlated with multiple random-ratio random-interval components; usually, the random-ratio schedule was assigned to the left button and the random-interval to the right. During interruptions on the multiple schedule, students filled out sentence-completion guess sheets (e.g., The way to earn points with the left button is to...). For different groups, guesses were shaped with differential points also worth money (e.g., successive approximations to “press fast” for the left button), or were instructed (e.g., Write “press slowly” for the left button), or were simply collected. Control of rate of pressing by guesses was examined in individual cases by reversing shaped or instructed guesses, by instructing pressing rates, and/or by reversing multiple-schedule contingencies. Shaped guesses produced guess-consistent pressing even when guessed rates opposed those characteristic of the contingencies (e.g., slow random-ratio and fast random-interval rates), whereas guesses and rates of pressing rarely corresponded after unsuccessful shaping of guesses or when guessing had no differential consequences. Instructed guesses and pressing were inconsistently related. In other words, when verbal responses were shaped (contingency-governed), they controlled nonverbal responding. When they were instructed (rule-governed), their control of nonverbal responding was inconsistent: the verbal behavior sometimes controlled, sometimes was controlled by, and sometimes was independent of the nonverbal behavior. 相似文献
40.
This study investigated the influence of intertrial interval duration on the performance of autistic children during teaching situations. The children were taught under the same conditions existing in their regular programs, except that the length of time between trials was systematically manipulated. With both multiple baseline and repeated reversal designs, two lengths of intertrial interval were employed: short intervals with the SD for any given trial presented approximately one second following the reinforcer for the previous trial versus long intervals with the SD presented four or more seconds following the reinforcer for the previous trial. The results showed that: (1) the short intertrial intervals always produced higher levels of correct responding than the long intervals; and (2) there were improving trends in performance and rapid acquisition with the short intertrial intervals, in contrast to minimal or no change with the long intervals. The results are discussed in terms of utilizing information about child and task characteristics in terms of selecting optimal intervals. The data suggest that manipulations made between trials have a large influence on autistic children's learning. 相似文献