Perceptual and Central Interference in Dual-Task Performance
نویسندگان
چکیده
Humans often experience difficulty when asked to perform multiple tasks at the same time. Two of the better-known forms of dual-task interference are the attentional blink (AB) effect and the Psychological Refractory Period (PRP) effect. These phenomena have traditionally been studied independently, using divergent methodologies and different dependent measures. The purpose of this chapter is to explore the possibility that these dual-task phenomena might reflect the same underlying processing limitation – a central bottleneck. We also discuss how AB and PRP effects are related to other phenomena such as repetition blindness and movements of spatial attention across visual space.
منابع مشابه
The Effects of Counting the Stride Numbers on the Parkinsonian Gait: Suggesting a Possible Reason for Dual Task Interference
Introduction: Parkinson Disease (PD) is a degenerative and progressive disorder of the central nervous system. It results from degeneration of Substantia Nigra pars compacta (SNc) of the Basal Ganglia (BG). Gait disturbances in PD patients generally get worse over time. The underlying mechanism of gait disturbances in PD has not been elucidated yet. Methods: In this study, we tried to analyze ...
متن کاملPerceptual load and attentional boost: a study of their interaction.
Increasing attention to an item typically interferes with the ability to process other concurrent information. The attentional boost effect, however, appears to contradict the ubiquity of dual-task interference. Rather, detecting a target item for one task boosts memory for a currently presented, but unrelated background scene. To account for the apparent discrepancy between dual-task interfere...
متن کاملThe Effect of Dual Task Interference on Gait in Aging: Role of Working Memory Components
The purpose of the present study was to investigate the effect of concurrent cognitive tasks activating phonological loop and visuospatial scratchpad of working memory on gait in older adults.12 older adults with the age range of 65-70 years performed walking trials in 3 counterbalanced testing conditions including single walking, walking while performing visuospatial task and walking while per...
متن کاملLocus of semantic interference in picture naming: Evidence from dual-task performance.
Disagreement exists regarding the functional locus of semantic interference of distractor words in picture naming. This effect is a cornerstone of modern psycholinguistic models of word production, which assume that it arises in lexical response-selection. However, recent evidence from studies of dual-task performance suggests a locus in perceptual or conceptual processing, prior to lexical res...
متن کاملBrain mechanisms of serial and parallel processing during dual-task performance.
The psychological refractory period (PRP) refers to the fact that humans typically cannot perform two tasks at once. Behavioral experiments have led to the proposal that, in fact, peripheral perceptual and motor stages continue to operate in parallel, and that only a central decision stage imposes a serial bottleneck. We tested this model using neuroimaging methods combined with innovative time...
متن کامل