Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Audiovisual temporal integration is the fact that the relative timing of audio-visual stimulation should be bound into a unified percept. The audiovisual temporal integration of autism spectrum disorders (ASD) was confirmed to be impaired mainly in four aspects. First, the temporal binding window is wider and more symmetrical. Second, ASD got weaker ability of rapid audiovisual temporal recalibration. Third, the effect that visual target search can be improved by a synchronous sound decreased has been found to be missing in ASD in some studies. Last, ASD showed impaired audiovisual temporal acuity for speech stimuli. Various methods are used to probe for temporal aspects of audiovisual integration, such as sound-induced flash illusion task and "pip-pop" task. The simultaneity judgment task, temporal order judgment task and preferential-looking task are mainly used to measure intersensory synchrony. Relevant theories from abnormal neural processing, the internal priors and the interaction between multiple sensory modals explain those defects. In future, researchers should improve the ecological validity of study, further integrate different theoretical explanations and accurate quantitative diagnostic indicators, as well as exploit the effective intervention strategies.
Subjects: Psychology >> Cognitive Psychology submitted time 2018-03-22 Cooperative journals: 《心理学报》
Abstract： Emotional attention bias refers that emotional stimuli usually get priority of attention over the neutral stimuli, which has been frequently replicated in normal participants. However, previous studies reported that teenagers with autism spectrum disorders (ASD) had atypical attention patterns of processing emotional faces and pictures, that is, their first attention was located at the neutral stimuli instead of the emotional stimuli. According to the perceptual load theory, some studies demonstrated the deficiency of attention bias to emotions in the teenagers with ASD was due to the perceptual load of the main task was too high for them, so that they can’t process the emotion. Till now, little has been known about the ASD teenagers’ attention in processing auditory emotional stimuli, although emotional expression also actually depends on the changes of acoustic cues in the speech prosody. To testify the generality of attention bias to cross-model emotions in the teenagers with ASD, we extended the experimental materials to emotional prosody. In present study, 15 teenagers with ASD and 17 typical developing (TD) people were recruited in two experiments. The participants were required to complete a main task while the emotional prosody voices were presented as the deviated task-irrelevant stimuli. In Experiment 1, the participants were instructed to ignore sounds and to classify the pictures. In Experiment 2, we adopted a dual-task paradigm, which required participants to respond to the target letters first and then to point whether they hear the novel emotional prosody. And in experiment 2, we also manipulated the level of perceptual load through changing the similarity between the letters in virtual round.
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