The Experts below are selected from a list of 107214 Experts worldwide ranked by ideXlab platform
Priska Hagmann-von Arx - One of the best experts on this subject based on the ideXlab platform.
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Gait in Children with Attention-Deficit Hyperactivity Disorder in a Dual-Task Paradigm
Frontiers in psychology, 2017Co-Authors: Olivia Manicolo, Alexander Grob, Priska Hagmann-von ArxAbstract:The aim was to examine gait in school-aged children with attention-deficit hyperactivity disorder (ADHD) and typically developing controls in a Dual-Task Paradigm. Thirty children with ADHD (without or off medication) aged 7-13 years and 28 controls walked without an additional task (single-task walking) and while performing a concurrent cognitive or motor task (Dual-Task walking). Gait was assessed using GAITRite recordings of spatiotemporal and variability gait parameters. Compared to single-task walking, Dual-Tasking significantly altered walking performance of children with and without ADHD, whereby Dual-Task effects on gait were not different between the two groups. For both children with ADHD and controls the motor concurrent task had a stronger effect on gait than the cognitive concurrent task. Gait in children with and without ADHD is affected in a Dual-Task Paradigm indicating that walking requires executive functions. Future investigations of children's Dual-Task walking should account for the type of concurrent tasks.
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walking in school aged children in a dual task Paradigm is related to age but not to cognition motor behavior injuries or psychosocial functioning
Frontiers in Psychology, 2016Co-Authors: Priska Hagmann-von Arx, Olivia Manicolo, Sakari Lemola, Alexander GrobAbstract:Age-dependent gait characteristics and associations with cognition, motor behavior, injuries, and psychosocial functioning were investigated in 138 typically developing children aged 6.7-13.2 years (M = 10.0 years). Gait velocity, normalized velocity, and variability were measured using the walkway system GAITRite without an additional task (single task) and while performing a motor or cognitive task (dual task). Assessment of children's cognition included tests for intelligence and executive functions; parents reported on their child's motor behavior, injuries, and psychosocial functioning. Gait variability (an index of gait regularity) decreased with increasing age in both single- and Dual-Task walking. Dual-Task gait decrements were stronger when children walked in the motor compared to the cognitive Dual-Task condition and decreased with increasing age in both Dual-Task conditions. Gait alterations from single- to Dual-Task conditions were not related to children's cognition, motor behavior, injuries, or psychosocial functioning.
Adam Qureshi - One of the best experts on this subject based on the ideXlab platform.
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executive function underlies both perspective selection and calculation in level 1 visual perspective taking
Psychonomic Bulletin & Review, 2018Co-Authors: Adam Qureshi, Rebecca L MonkAbstract:Previous research has suggested that the calculation of another's perspective is cognitively efficient, whereas perspective selection (selection of a particular perspective, self or other) is associated with executive function, particularly inhibitory control. However, research has not previously tested how perspective calculation and selection may be associated with another key executive function, working memory. In the present study (N = 54 adult participants), we administered a Level-1 visual perspective task in a Dual-Task Paradigm in which the secondary task required working memory. The results suggest that executive function is associated with both perspective calculation and perspective selection, contrary to previous evidence from similar Dual-Task studies that had used inhibitory control and attention-based secondary tasks. This contrast may suggest that working memory capacity facilitates perspective-taking. Furthermore, it may follow that the notion of simple perspective-taking is distinct from more the complex and cognitively demanding "theory of mind." Research of this nature warrants further investigation.
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executive function is necessary for perspective selection not level 1 visual perspective calculation evidence from a dual task study of adults
Cognition, 2010Co-Authors: Adam Qureshi, Ian A Apperly, Dana SamsonAbstract:Previous research suggests that perspective-taking and other "theory of mind" processes may be cognitively demanding for adult participants, and may be disrupted by concurrent performance of a secondary task. In the current study, a Level-1 visual perspective task was administered to 32 adults using a Dual-Task Paradigm in which the secondary task tapped executive function. Results suggested that the secondary task did not affect the calculation of perspective, but did affect the selection of the relevant (Self or Other) perspective for a given trial. This is the first direct evidence of a cognitively efficient process for "theory of mind" in adults that operates independently of executive function. The contrast between this and previous findings points to a distinction between simple perspective-taking and the more complex and cognitively demanding abilities more typically examined in studies of "theory of mind". It is suggested that these findings may provide a parsimonious explanation of the success of infants on 'indirect' measures of perspective-taking that do not explicitly require selection of the relevant perspective.
Sigal Portnoy - One of the best experts on this subject based on the ideXlab platform.
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evaluation of the effects of adding vibrotactile feedback to myoelectric prosthesis users on performance and visual attention in a dual task Paradigm
Clinical Rehabilitation, 2018Co-Authors: Eitan Raveh, Jason Friedman, Sigal PortnoyAbstract:Objective:To evaluate the effects of adding vibrotactile feedback to myoelectric prosthesis users on the performance time and visual attention in a Dual-Task Paradigm.Design:A repeated-measures des...
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Visuomotor behaviors and performance in a Dual-Task Paradigm with and without vibrotactile feedback when using a myoelectric controlled hand
Assistive Technology, 2017Co-Authors: Eitan Raveh, Jason Friedman, Sigal PortnoyAbstract:Prosthesis users allocate visual attention to their prosthetic hand while performing activities of daily living (ADLs), due to absence of sensory feedback. Dual-Task assignments present competition for visual attention and may affect the performance of ADLs. Vibrotactile feedback (VTF) is a frequently-used method to provide prosthesis users with tactile feedback. However, the effect of adding VTF on visual attention and performance in a motor Dual-Task Paradigm has not been investigated. Our aim was to compare visual attention and performance during ADLs in a motor Dual-Task Paradigm when using binary VTF and without using VTF. Forty-three able-bodied subjects (age 26 ± 6.6 years) had a myoelectric-controlled hand attached to their right hand. The dual task comprised of a computer game played with the left hand, while manipulating objects with the artificial hand. This was performed with and without VTF in a counter-balanced order of two conditions. An eye-tracker monitored visual attention, while time to complete each task and the time the virtual car went off-road were recorded. No significant differences were found in visual attention or in performance time between the two conditions. Further examination of adding VTF to prosthesis users is recommended, with disrupted visual feedback and basic grasping tasks.
Alexander Grob - One of the best experts on this subject based on the ideXlab platform.
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Gait in Children with Attention-Deficit Hyperactivity Disorder in a Dual-Task Paradigm
Frontiers in psychology, 2017Co-Authors: Olivia Manicolo, Alexander Grob, Priska Hagmann-von ArxAbstract:The aim was to examine gait in school-aged children with attention-deficit hyperactivity disorder (ADHD) and typically developing controls in a Dual-Task Paradigm. Thirty children with ADHD (without or off medication) aged 7-13 years and 28 controls walked without an additional task (single-task walking) and while performing a concurrent cognitive or motor task (Dual-Task walking). Gait was assessed using GAITRite recordings of spatiotemporal and variability gait parameters. Compared to single-task walking, Dual-Tasking significantly altered walking performance of children with and without ADHD, whereby Dual-Task effects on gait were not different between the two groups. For both children with ADHD and controls the motor concurrent task had a stronger effect on gait than the cognitive concurrent task. Gait in children with and without ADHD is affected in a Dual-Task Paradigm indicating that walking requires executive functions. Future investigations of children's Dual-Task walking should account for the type of concurrent tasks.
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walking in school aged children in a dual task Paradigm is related to age but not to cognition motor behavior injuries or psychosocial functioning
Frontiers in Psychology, 2016Co-Authors: Priska Hagmann-von Arx, Olivia Manicolo, Sakari Lemola, Alexander GrobAbstract:Age-dependent gait characteristics and associations with cognition, motor behavior, injuries, and psychosocial functioning were investigated in 138 typically developing children aged 6.7-13.2 years (M = 10.0 years). Gait velocity, normalized velocity, and variability were measured using the walkway system GAITRite without an additional task (single task) and while performing a motor or cognitive task (dual task). Assessment of children's cognition included tests for intelligence and executive functions; parents reported on their child's motor behavior, injuries, and psychosocial functioning. Gait variability (an index of gait regularity) decreased with increasing age in both single- and Dual-Task walking. Dual-Task gait decrements were stronger when children walked in the motor compared to the cognitive Dual-Task condition and decreased with increasing age in both Dual-Task conditions. Gait alterations from single- to Dual-Task conditions were not related to children's cognition, motor behavior, injuries, or psychosocial functioning.
Steven J. Luck - One of the best experts on this subject based on the ideXlab platform.
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Visual Search Remains Efficient when Visual Working Memory is Full
Psychological science, 2001Co-Authors: Geoffrey F Woodman, Steven J. LuckAbstract:Many theories of attention have proposed that visual working memory plays an important role in visual search tasks. The present study examined the involvement of visual working memory in search using a Dual-Task Paradigm in which participants performed a visual search task while maintaining no, two, or four objects in visual working memory. The presence of a working memory load added a constant delay to the visual search reaction times, irrespective of the number of items in the visual search array. That is, there was no change in the slope of the function relating reaction time to the number of items in the search array, indicating that the search process itself was not slowed by the memory load. Moreover, the search task did not substantially impair the maintenance of information in visual working memory. These results suggest that visual search requires minimal visual working memory resources, a conclusion that is inconsistent with theories that propose a close link between attention and working memory.
