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131.
Visual stimuli as well as transcranial magnetic stimulation (TMS) can be used: (1) to suppress the visibility of a target and (2) to recover the visibility of a target that has been suppressed by another mask. Both types of stimulation thus provide useful methods for studying the microgenesis of object perception. We first review evidence of similarities between the processes by which a TMS mask and a visual mask can either suppress the visibility of targets or recover such suppressed visibility. However, we then also point out a significant difference that has important implications for the study of the time course of unconscious and conscious visual information processing and for theoretical accounts of the processes involved. We present evidence and arguments showing: (a) that visual masking techniques, by revealing more detailed aspects of target masking and target recovery, support a theoretical approach to visual masking and visual perception that must take into account activities in two separate neural channels or processing streams and, as a corollary, (b) that at the current stage of methodological sophistication visual masks, by acting in more highly specifiable ways on these pathways, provide information about the microgenesis of form perception not available with TMS masks. 相似文献
132.
Using a metacontrast masking paradigm, prior studies have shown (a) that a target's color information and form information, can be processed without awareness and (b) that unconscious color processing occurs at early, wavelength-dependent levels in the cortical information processing hierarchy. Here we used a combination of paracontrast and metacontrast masking techniques to explore unconscious color and form priming effects produced by blue, green, and neutral stimuli. We found that color priming in normal observers is significantly reduced when an additional paracontrast mask precedes the target at optimal masking SOAs. However, no reduction of form-priming effects was obtained at similar optimal paracontrast SOAs. We conclude that unconscious color priming depends on an early, wavelength- or stimulus-dependent response of color neurons located at early cortical levels whereas unconscious form priming occurs at later levels. 相似文献
133.
Gábor?Jandó Tiziano?AgostiniEmail author Alessandra?Galmonte Nicola?Bruno 《Behavior research methods》2003,35(1):70-81
Surface color is traditionally measured by matching methods. However, in some conditions, the color of certain surfaces cannot be measured: The surface simply looks brighter or darker than all the patches on a matching scale. We studied the reliability, validity, and range of application of three different types of simulated Munsell scales (white-, black-, and split-surrounded) as methods for measuring surface colors in simple disk-ring displays. All the scales were equally reliable for matching both increments and decrements, but about 20% of the increments were unmatchable on the white-surrounded scale, about 13% of the decrements were unmatchable on the black-surrounded scale, and about 9% of the increments were unmatchable on the split-surrounded scale. However, matches on all the scales were linearly related. Therefore, it is possible to convert them to common units, using regression parameters. These units provide an extended metric for measuring all increments and decrements in the stimulus space, effectively removing ceiling and floor effects, and providing measures even for surfaces that were perceived as out of range on some of the scales. 相似文献
134.
Bruno H. Repp 《Psychological research》1998,61(1):33-43
Previous research has shown that, in a task requiring the detection of local deviations from mechanically precise timing
in music, the relative detectability of deviations in different positions is closely related to the typical expressive timing
pattern musicians produce when playing the music. This result suggests that listeners expect to hear music expressively timed
and compensate for the absence of expressive timing. Three new detection experiments shed additional light on the nature of
these timing expectations in musically trained listeners. Experiment 1 shows that repeated exposure to an atypically (but
not unmusically) timed performance leaves listeners' timing expectations unaffected. Experiment 2 demonstrates that the expectations
do not manifest themselves when listeners merely imagine the music in synchrony with a click track. Experiment 3, however,
shows that the timing expectations are fully operational when the click track is superimposed on the music. These results
reveal timing “expectations” to be an obligatory consequence of the ongoing auditory perception of musical structure.
Received: 5 November 1996 / Accepted: 26 February 1997 相似文献
135.
Bruno H. Repp 《Attention, perception & psychophysics》1978,24(5):471-485
The place of articulation of intervocalic stop consonants is conveyed by temporally distributed spectral information, viz, the formant transitions preceding and following the silent closure interval (VC and CV transitions). Experiment 1 shows that more than 200 msec of silent closure is needed to hear VC and CV formant transitions as separate phonemic events (geminate stops). As closure duration is reduced, these cues are integrated into a single phonemic percept, and the VC transitions become increasingly redundant (Experiments 2 and 3). VC and CV transitions conveying different places of articulation, on the other hand, are heard as separate phonemes at closure durations as short as 100 msec. If closure duration is further reduced, a single stop is heard whose place of articulation corresponds to the CV transitions (Experiment 3). Even in the absence of CV transitions, VC transitions carry little perceptual weight at very short closure durations (Experiment 4). Despite their apparent redundancy, however, the VC transitions exert a positive bias on the perception of CV transitions at very short closure durations. At closure durations beyond 100 msec, on the other hand, VC and CV transitions interact contrastively in perception and tend to be heard as different phonemes (Experiments 5 and 6). The results of these experiments suggest two different processes of temporal integration in phonetic perception, one taking place at a precategorical level, the other combining identical phoneme categories within a certain time span. 相似文献
136.
The complex problems experienced by juvenile offenders require a multifaceted approach to treatment. Meeting the interwoven psychological and environmental needs of delinquent youngsters involves four differential treatment functions: behaviour adjustment, growth counseling, child advocacy, and social chance. Mental health counselors and juvenile-justice-system workers can coordinate their efforts toward comprehensive treatment by analyzing their roles in terms of these four functions and by keeping their roles clearly understood among themselves and with their clients. 相似文献
137.
Conclusions from an earlier study testing the validity of the Felt Figure Replacement Technique (FFRT) were questioned and three new measures of FFRT performance were developed. The reliability of these three measures, and the conventional measure of distance error, was checked using a sample of 54 female and 49 male undergraduates at Oregon State University. These subjects also completed an established personality inventory. Three of the four FFRT measures tested proved to be reliable, and it was found that models combining the three reliable FFRT measures could yield successful predictions on the personality dimensions for females but not for males; although males and females perform similarly on the FFRT. Both groups made the same kinds of errors relative to the standard placement. Also, males and females differ on only one of the three reliable FFRT measures. It was concluded that the FFRT may yet prove a valuable assessment approach, and the implications of these conclusions for personality assessment were discussed. 相似文献
138.
Illusory figures based on local kinematics. 总被引:1,自引:0,他引:1
A new type of motion-induced illusory figure determined by local kinematic information is investigated. The new figure is induced by radial line patterns subjected to either figure motion (the lines change as if they were stationary and a triangle was rotating in front of them) or background motion (the lines change as if they were being rotated behind a stationary triangle). Although the two kinds of motion are equivalent from the viewpoint of relative displacements, perceptually they yield very different results. With background motion, observers tend to perceive rigid figures that have a triangular shape. With figure motion, observers report seeing deforming figures with shapes that vary depending on the number of lines in the display. We consider two alternative accounts for this asymmetry which we term the background superiority effect (BSE). The first account proposes that the effect is due to retinal persistence and to figure stability. Against this line of explanation, we demonstrate that observers also see rigid triangular shapes in displays where both the figure and the radial lines rotate (double motion displays). The second account proposes that the effect depends on the availability of local kinematic information constraining contour orientation. This second line of explanation is consistent with observers' reports of bowed edges in double motion displays rotating in phase or in counterphase. Candidate mechanisms for extracting local kinematic information are discussed. 相似文献
139.
Marianna Frascarelli Tommaso Accinni Antonino Buzzanca Luca Carlone Francesco Ghezzi Antonella Moschillo Georgios D. Kotzalidis Paola Bucci Giulia Maria Giordano Martina Fanella Carlo Di Bonaventura Carolina Putotto Bruno Marino Massimo Pasquini Massimo Biondi Fabio Di Fabio 《Journal of Neuropsychology》2023,17(3):564-583
Patients with the 22q11.2 deletion syndrome (DS) show an increased risk of developing a psychotic illness lifetime. 22q11.2DS may represent a reliable model for studying the neurobiological underpinnings of schizophrenia. The study of social inference abilities in a genetic condition at high risk for psychosis, like 22q11.2DS, may shed light on the relationships between neurocognitive processes and patients' daily general functioning. The study sample consisted of 1736 participants, divided into four groups: 22q11.2DS patients with diagnosis of psychotic disorder (DEL SCZ, N = 20); 22q11.2DS subjects with no diagnosis of psychosis (DEL, N = 43); patients diagnosed with schizophrenia without 22q11.2DS (SCZ, N = 893); and healthy controls (HC, N = 780). Social cognition was assessed through The Awareness of Social Inference Test (TASIT) and general functioning through the Specific Levels of Functioning (SLoF) scale. We analysed data through regression analysis. The SCZ and DEL groups had similar levels of global functioning; they both had significantly lower SLoF Total scores than HC (p < .001); the DEL SCZ group showed significantly lower scores compared to the other groups (SCZ, p = .004; DEL, p = .003; HC, p < .001). A significant deficit in social cognition was observed in the three clinical groups. In the DEL SCZ and SCZ groups, TASIT scores significantly predicted global functioning (p < .05). Our findings of social cognition deficit in psychosis-prone patients point to the possible future adoption of rehabilitation programmes, like Social Skills Training and Cognitive Remediation, during premorbid stages of psychosis. 相似文献
140.
Spatial representation of pitch height: the SMARC effect 总被引:1,自引:0,他引:1
Through the preferential pairing of response positions to pitch, here we show that the internal representation of pitch height is spatial in nature and affects performance, especially in musically trained participants, when response alternatives are either vertically or horizontally aligned. The finding that our cognitive system maps pitch height onto an internal representation of space, which in turn affects motor performance even when this perceptual attribute is irrelevant to the task, extends previous studies on auditory perception and suggests an interesting analogy between music perception and mathematical cognition. Both the basic elements of mathematical cognition (i.e. numbers) and the basic elements of musical cognition (i.e. pitches), appear to be mapped onto a mental spatial representation in a way that affects motor performance. 相似文献