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61.
Audio-visual simultaneity judgments 总被引:3,自引:0,他引:3
The relative spatiotemporal correspondence between sensory events affects multisensory integration across a variety of species; integration is maximal when stimuli in different sensory modalities are presented from approximately the same position at about the same time. In the present study, we investigated the influence of spatial and temporal factors on audio-visual simultaneity perception in humans. Participants made unspeeded simultaneous versus successive discrimination responses to pairs of auditory and visual stimuli presented at varying stimulus onset asynchronies from either the same or different spatial positions using either the method of constant stimuli (Experiments 1 and 2) or psychophysical staircases (Experiment 3). The participants in all three experiments were more likely to report the stimuli as being simultaneous when they originated from the same spatial position than when they came from different positions, demonstrating that the apparent perception of multisensory simultaneity is dependent on the relative spatial position from which stimuli are presented. 相似文献
62.
M. Usher and J. L. McClelland (2004) recently proposed a new connectionist type of model to explain context effects on preferential choice including the similarity, attraction, and compromise effects. They compared their model with an earlier connectionist type model for these same effects proposed by R. Roe, J. R. Busemeyer, and J. T. Townsend (2001) and raised several new issues. The authors address these issues and point out the main theoretical differences between the 2 explanations for context effects. 相似文献
63.
David?L.?LeeEmail author Sam?Stansbery Richard?KubinaJr. Rachel?Wannarka 《Journal of Behavioral Education》2005,14(4):267-281
Basic fact acquisition is an important component for developing higher-order math skills. However, getting students with a
history of academic noncompliance to engage in activities related to skills acquisition can be difficult. Prior research demonstrates
that engagement increases when nonpreferred activities are preceded by a series of brief activities with a high probability
of completion. This technique, called high-p task/request sequences, was not fully explored within the context of skill acquisition. The purpose of this study was to
examine the effects of adding high-p sequences to explicit instruction on the math fact acquisition of three elementary-age students in a learning support classroom.
Results showed no differences in fact acquisition between explicit instruction and explicit instruction with an added high-p component. However, the high-p sessions took nearly twice as long to complete when compared to explicit instruction alone. Implications for instructional
efficiency and limitations of the high-p procedures for acquisition tasks are discussed. 相似文献
64.
Garcia DM Reser AH Amo RB Redersdorff S Branscombe NR 《Personality & social psychology bulletin》2005,31(6):769-780
The authors extend recent research concerning the social costs of claiming discrimination by examining men's and women's responses to in-group and out-group targets who either blamed a failing grade on discrimination or answer quality. Although participants generally responded more negatively to targets who blamed discrimination, rather than answer quality, dislike was greatest and gender group identification was lowest when participants evaluated an in-group target. Moreover, an in-group target who claimed discrimination was perceived as avoiding personal responsibility for outcomes to a greater extent than was a similar out-group target. Perceptions that the target avoided outcome responsibility by claiming discrimination were shown to mediate the relationship between attribution type and dislike of the in-group target. The authors discuss their results in terms of intragroup processes and suggest that social costs may especially accrue for in-group members when claiming discrimination has implications for the in-group's social identity. 相似文献
65.
66.
Significance of Childhood Conduct Problems to Later Development of Conduct Disorder Among Children With ADHD: A Prospective Follow-Up Study 总被引:3,自引:0,他引:3
This study investigates whether low to moderate levels of childhood oppositional defiant disorder (ODD) and conduct disorder (CD) behaviors contribute to the development of clinically diagnosed CD in adolescence, in children with attention deficit hyperactivity disorder (ADHD). Participants were 207 White boys (ages 6-12) with ADHD free of conduct disorder diagnoses. Parent and teacher ratings were obtained. Participants were assessed at mean age 18 by clinicians blind to childhood status. A non-ADHD group (recruited in adolescence) was also studied. ODD behavior ratings did not predict CD in adolescence, whereas CD behavior ratings did. No single ODD or CD behavior predicted adolescent outcome. ADHD probands with very low ratings (Not at all, Just a little) by parents and teachers on all CD behaviors were still at significantly increased risk for CD in adolescence, compared to non-ADHD controls. The same relationships were found between childhood ODD and CD behaviors, and antisocial personality disorder in adulthood (mean age, 25). We conclude that childhood ADHD is a developmental precursor of later antisocial disorder, even in the absence of comorbid ODD or CD in childhood. However, low levels of CD-type problems are not innocuous, because they predict later CD among children with ADHD without comorbid CD. 相似文献
67.
68.
Soto-Faraco S Spence C Kingstone A 《Cognitive, affective & behavioral neuroscience》2004,4(2):208-217
Behavioral studies of multisensory integration in motion perception have focused on the particular case of visual and auditory
signals. Here, we addressed a new case: audition and touch. In Experiment 1, we tested the effects of an apparent motion stream
presented in an irrelevant modality (audition or touch) on the perception of apparent motion streams in the other modality
(touch or audition, respectively). We found significant congruency effects (lower performance when the direction of motion
in the irrelevant modality was incongruent with the direction of the target) for the two possible modality combinations. This
congruency effect was asymmetrical, with tactile motion distractors having a stronger influence on auditory motion perception
than vice versa. In Experiment 2, we used auditory motion targets and tactile motion distractors while participants adopted
one of two possible postures: arms uncrossed or arms crossed. The effects of tactile motion on auditory motion judgments were
replicated in the arms-uncrossed posture, but they dissipated in the arms-crossed posture. The implications of these results
are discussed in light of current findings regarding the representation of tactile and auditory space. 相似文献
69.
This study addressed the role of proprioceptive and visual cues to body posture during the deployment of tactile spatial attention. Participants made speeded elevation judgments (up vs. down) to vibrotactile targets presented to the finger or thumb of either hand, while attempting to ignore vibrotactile distractors presented to the opposite hand. The first two experiments established the validity of this paradigm and showed that congruency effects were stronger when the target hand was uncertain (Experiment 1) than when it was certain (Experiment 2). Varying the orientation of the hands revealed that these congruency effects were determined by the position of the target and distractor in external space, and not by the particular skin sites stimulated (Experiment 3). Congruency effects increased as the hands were brought closer together in the dark (Experiment 4), demonstrating the role of proprioceptive input in modulating tactile selective attention. This spatial modulation was also demonstrated when a mirror was used to alter the visually perceived separation between the hands (Experiment 5). These results suggest that tactile, spatially selective attention can operate according to an abstract spatial frame of reference, which is significantly modulated by multisensory contributions from both proprioception and vision. 相似文献
70.
The interrelationships among health-related stress, positive and negative affect, and depressive symptoms patterned in the dynamic model of affect (J. Reich, A. Zautra, & M. Davis, 2003) were examined using data from 932 women having an adult child with a developmental disability. Results indicate that women experience a moderate inverse correlation between positive and negative affect under conditions of low levels of health-related stress, whereas at high levels of stress, positive and negative affect become more strongly inversely correlated. Under high-stress conditions, both negative affect and positive affect have a stronger relationship to depressive symptoms than they do under low-stress conditions. 相似文献