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81.
The motion aftereffect is a robust illusion of visual motion resulting from exposure to a moving pattern. There is a widely accepted explanation of it in terms of changes in the response of cortical direction-selective neurons. Research has distinguished several variants of the effect. Converging recent evidence from different experimental techniques (psychophysics, single-unit recording, brain imaging, transcranial magnetic stimulation, visual evoked potentials and magnetoencephalography) reveals that adaptation is not confined to one or even two cortical areas, but occurs at multiple levels of processing involved in visual motion analysis. A tentative motion-processing framework is described, based on motion aftereffect research. Recent ideas on the function of adaptation see it as a form of gain control that maximises the efficiency of information transmission at multiple levels of the visual pathway. 相似文献
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We compared the mobbing response to model snakes of two groups of captive-born common marmosets (Callithrix jacchus) differing in genetic relatedness, age and past experience. Mobbing vocalisations (tsik calls), other mobbing behaviour and
attention to the stimulus were recorded for 2 min. intervals pre-exposure, during exposure to various stimuli and post-exposure.
Marmosets in one group were vocally reactive to all stimuli, although more so to one particular stimulus resembling rearing
snakes and modified images of it, whereas the marmosets in a younger and genetically unrelated group attended to the stimuli
but made very few mobbing calls. The parent stock of the first group had suffered stress in early life and had developed a
phobic response to a specific stimulus, which they had transmitted to their offspring. A third group, matching the older group
in age range but genetically unrelated, was also found to be unresponsive to the stimulus that elicited the strongest response
in the first group. Cortisol levels in samples of hair were assayed and a significant negative correlation was found between
the number of tsik calls made during presentation of the stimuli and the cortisol level, showing that mobbing behaviour/behavioural
reactivity is associated with low levels of physiological stress. 相似文献
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Emily K. Langton Caio F. Miguel Jocelyn E. Diaz Maria Clara Cordeiro Megan R. Heinicke 《Journal of applied behavior analysis》2020,53(3):1466-1484
Twelve college students learned to tact the names of notes and rhythms and play them when presented with compound stimuli (visuals of notes and rhythms on a musical staff). In Experiment 1, we assessed generalization by presenting novel notes, rhythms, and compound stimuli not previously paired together. In the second experiment, we added a metronome that played at 60 beats per minute in all conditions for 3 out of 6 participants to ensure consistent tempo. Across both experiments, participants passed almost all posttests with the exception of tacting and playing in the presence of sound clips. Our data suggest that matrix training is an effective procedure to teach music skills to college students. 相似文献
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Andreea Geambașu Sybren Spit Daan van Renswoude Elma Blom Paula J.P.M. Fikkert Sabine Hunnius Caroline C.M.M. Junge Josje Verhagen Ingmar Visser Frank Wijnen Clara C. Levelt 《Developmental science》2023,26(1):e13244
We conducted a close replication of the seminal work by Marcus and colleagues from 1999, which showed that after a brief auditory exposure phase, 7-month-old infants were able to learn and generalize a rule to novel syllables not previously present in the exposure phase. This work became the foundation for the theoretical framework by which we assume that infants are able to learn abstract representations and generalize linguistic rules. While some extensions on the original work have shown evidence of rule learning, the outcomes are mixed, and an exact replication of Marcus et al.'s study has thus far not been reported. A recent meta-analysis by Rabagliati and colleagues brings to light that the rule-learning effect depends on stimulus type (e.g., meaningfulness, speech vs. nonspeech) and is not as robust as often assumed. In light of the theoretical importance of the issue at stake, it is appropriate and necessary to assess the replicability and robustness of Marcus et al.'s findings. Here we have undertaken a replication across four labs with a large sample of 7-month-old infants (N = 96), using the same exposure patterns (ABA and ABB), methodology (Headturn Preference Paradigm), and original stimuli. As in the original study, we tested the hypothesis that infants are able to learn abstract “algebraic” rules and apply them to novel input. Our results did not replicate the original findings: infants showed no difference in looking time between test patterns consistent or inconsistent with the familiarization pattern they were exposed to. 相似文献
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Olivia G. Glasgow Timothy Anderson Chao-Yang Lee Glynnis Hixson Ashleigh Johnson Jonnierah Smith Clara E. Hill 《Counselling and Psychotherapy Research》2023,23(3):830-836
The facilitative interpersonal skills (FIS) method uses simulations of difficult client moments as a test of helpers' ability to remain therapeutic in therapeutically stressful situations. A total of 135 participants completed the FIS task as part of a training in helping skills and provided verbal responses that were assessed by trained raters for interpersonal skills. Audio recordings of these verbal responses were then analysed acoustically for fundamental frequency (F0), spectral slope and F0 range. Mean F0 and F0 range were more highly associated with trained raters' ratings of FIS for female participants than for male participants, although F0 range was associated with FIS of both males and females. The results suggest that F0 is associated with FIS for females, especially the FIS items that are indicative of emotional expression and verbal fluency. Findings are discussed as possibly indicating that some expression of higher F0 in response to distressed client situations may be part of interpersonal skills, such that more skilled therapists respond to stressful client situations with a higher F0. 相似文献
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