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https://www.readbyqxmd.com/read/28230418/effect-of-age-on-attentional-control-in-dual-tasking
#1
Bianca Bier, Nick Corriveau Lecavalier, Dominique Malenfant, Isabelle Peretz, Sylvie Belleville
: Background/Study Context: The age-related differences in divided attention and attentional control have been associated with several negative outcomes later in life. However, numerous questions remain unanswered regarding the nature of these age differences and the role of attentional control abilities in dual-tasking. The aim of this study was to evaluate the sources for age differences in dual-tasking and more specifically: (1) whether they occur because of differences in attentional control skills, or (2) whether the age-related decrement in dual-tasking is due to a general resource reduction that would affect the ability to complete any demanding task...
March 2017: Experimental Aging Research
https://www.readbyqxmd.com/read/28230396/detecting-target-changes-in-multiple-object-tracking-with-peripheral-vision-more-pronounced-eccentricity-effects-for-changes-in-form-than-in-motion
#2
Christian Vater, Ralf Kredel, Ernst-Joachim Hossner
In the current study, dual-task performance is examined with multiple-object tracking as a primary task and target-change detection as a secondary task. The to-be-detected target changes in conditions of either change type (form vs. motion; Experiment 1) or change salience (stop vs. slowdown; Experiment 2), with changes occurring at either near (5°-10°) or far (15°-20°) eccentricities (Experiments 1 and 2). The aim of the study was to test whether changes can be detected solely with peripheral vision. By controlling for saccades and computing gaze distances, we could show that participants used peripheral vision to monitor the targets and, additionally, to perceive changes at both near and far eccentricities...
February 23, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28226309/the-feasibility-of-singing-to-improve-gait-in-parkinson-disease
#3
Elinor C Harrison, Marie E McNeely, Gammon M Earhart
Brain regions important for controlling movement are also responsible for rhythmic processing. In Parkinson disease (PD), defective internal timing within the brain has been linked to impaired beat discrimination, and may contribute to a loss of ability to maintain a steady gait rhythm. Less rhythmic gait is inherently less efficient, and this may lead to gait impairment including reduced speed, cadence, and stride length, as well as increased variability. While external rhythmic auditory stimulation (e.g. a metronome beat) is well-established as an effective tool to stabilize gait in PD, little is known about whether self-generated cues such as singing have the same beneficial effect on gait in PD...
February 14, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28220715/a-systematic-review-of-mechanisms-of-gait-speed-change-post-stroke-part-1-spatiotemporal-parameters-and-asymmetry-ratios
#4
Elizabeth C Wonsetler, Mark G Bowden
BACKGROUND: In walking rehabilitation trials, self-selected walking speed (SSWS) has emerged as the dominant outcome measure to assess walking ability. However, this measure cannot differentiate between recovery of impaired movement and compensation strategies. Spatiotemporal variables and asymmetry ratios are frequently used to quantify gait deviations and are hypothesized markers of recovery. OBJECTIVES: The purpose of this review is to investigate spatiotemporal variables and asymmetry ratios as mechanistic recovery measures in physical therapy intervention studies post-stroke...
February 21, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28220091/effort-in-multitasking-local-and-global-assessment-of-effort
#5
Andrea Kiesel, David Dignath
When performing multiple tasks in succession, self-organization of task order might be superior compared to external-controlled task schedules, because self-organization allows optimizing processing modes and thus reduces switch costs, and it increases commitment to task goals. However, self-organization is an additional executive control process that is not required if task order is externally specified and as such it is considered as time-consuming and effortful. To compare self-organized and externally controlled task scheduling, we suggest assessing global subjective and objectives measures of effort in addition to local performance measures...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28215746/performance-of-a-concurrent-cognitive-task-modifies-pre-and-post-perturbation-evoked-cortical-activity
#6
George Mochizuki, Shaun G Boe, Amanda Marlin, William E McIlroy
Preparation for postural instability engages cortical resources that serve to optimize compensatory balance responses. Engagement of these cortical resources in cognitive dual-task activities may impact the ability to appropriately prepare and optimize responses to instability. The purpose of this study was to determine whether cognitive dual-task activities influenced cortical activity preceding and following postural instability. Postural instability was induced using a lean-and-release paradigm in 10 healthy participants...
February 16, 2017: Neuroscience
https://www.readbyqxmd.com/read/28214766/direct-and-generative-retrieval-of-autobiographical-memories-the-roles-of-visual-imagery-and-executive-processes
#7
Rachel J Anderson, Stephen A Dewhurst, Graham M Dean
Two experiments used a dual task methodology to investigate the role of visual imagery and executive resources in the retrieval of specific autobiographical memories. In Experiment 1, dynamic visual noise led to a reduction in the number of specific memories retrieved in response to both high and low imageability cues, but did not affect retrieval times. In Experiment 2, irrelevant pictures reduced the number of specific memories but only in response to low imageability cues. Irrelevant pictures also increased response times to both high and low imageability cues...
February 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28213649/the-role-of-executive-attention-in-object-substitution-masking
#8
Hannah L Filmer, Roxanne Wells-Peris, Paul E Dux
It was long thought that a key characteristic of object substitution masking (OSM) was the requirement for spatial attention to be dispersed for the mask to impact visual sensitivity. However, recent studies have provided evidence questioning whether spatial attention interacts with OSM magnitude, suggesting that the previous reports reflect the impact of performance being at ceiling for the low attention load conditions. Another technique that has been employed to modulate attention in OSM paradigms involves presenting the target stimulus foveally, but with another demanding task shown immediately prior, and thus taxing executive/temporal attention...
February 17, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28208099/the-impact-of-walking-while-using-a-smartphone-on-pedestrians-awareness-of-roadside-events
#9
Ming-I Brandon Lin, Yu-Ping Huang
Previous studies have shown that using a cell phone to talk or text while walking changes gait kinematics and encourages risky street-crossing behaviors. However, less is known about how the motor-cognitive interference imposed by smartphone tasks affects pedestrians' situational awareness to environmental targets relevant to pedestrian safety. This study systematically investigated the influence of smartphone use on detection of and responses to a variety of roadside events in a semi-virtual walking environment...
February 13, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28203353/auditory-stimulus-detection-partially-depends-on-visuospatial-attentional-resources
#10
Basil Wahn, Supriya Murali, Scott Sinnett, Peter König
Humans' ability to detect relevant sensory information while being engaged in a demanding task is crucial in daily life. Yet, limited attentional resources restrict information processing. To date, it is still debated whether there are distinct pools of attentional resources for each sensory modality and to what extent the process of multisensory integration is dependent on attentional resources. We addressed these two questions using a dual task paradigm. Specifically, participants performed a multiple object tracking task and a detection task either separately or simultaneously...
January 2017: I-Perception
https://www.readbyqxmd.com/read/28182895/validity-test-retest-reliability-sensitivity-to-change-and-feasibility-of-motor-cognitive-dual-task-assessments-in-patients-with-dementia
#11
Nele C Lemke, Stefanie Wiloth, Christian Werner, Klaus Hauer
OBJECTIVE: To investigate validity, test-retest reliability, sensitivity to change, and feasibility of dual task (DT) assessments in patients with dementia. DESIGN: Validation study. SETTING: Post ward-rehabilitation. PARTICIPANTS: Geriatric patients (n=105) with dementia (age 82.7±5.9, MMSE score 21.9). MAIN OUTCOME MEASURES: Psychometric quality of DT performance of different DT-tests. Analyses were performed for motor and cognitive performance, and relative DT costs (DTCs)...
January 30, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28182495/no-evidence-for-task-automatization-after-dual-task-training-in-younger-and-older-adults
#12
Tilo Strobach, Torsten Schubert
The present study investigated the ability of older adults in contrast to younger adults to automatize new choice tasks as a result of simultaneous dual-task practice. Importantly, the study was carried out in conditions optimal for dual-task performance and task automatization. Despite this, the results of detailed analyses were not consistent with the assumption that either older or younger adults are able to automatize new choice tasks; neither group showed evidence of automatization. Even in analyses focusing on high dual-task performers (i...
February 2017: Psychology and Aging
https://www.readbyqxmd.com/read/28181206/ginkgo-biloba-special-extract-li-1370-improves-dual-task-walking-in-patients-with-mci-a-randomised-double-blind-placebo-controlled-exploratory-study
#13
Yves J Gschwind, Stephanie A Bridenbaugh, Sarah Reinhard, Urs Granacher, Andreas U Monsch, Reto W Kressig
BACKGROUND: In patients with mild cognitive impairment (MCI), gait instability, particularly in dual-task situations, has been associated with impaired executive function and an increased fall risk. Ginkgo biloba extract (GBE) could be an effective mean to improve gait stability. AIMS: This study investigated the effect of GBE on spatio-temporal gait parameters of MCI patients while walking under single and dual-task conditions. METHODS: Fifty patients aged 50-85 years with MCI and associated dual-task-related gait impairment participated in this randomised, double-blind, placebo-controlled, exploratory phase IV drug trial...
February 8, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28169147/single-task-and-dual-task-tandem-gait-test-performance-after-concussion
#14
David R Howell, Louis R Osternig, Li-Shan Chou
OBJECTIVES: To compare single-task and dual-task tandem gait test performance between athletes after concussion with controls on observer-timed, spatio-temporal, and center-of-mass (COM) balance control measurements. DESIGN: Ten participants (19.0±5.5years) were prospectively identified and completed a tandem gait test protocol within 72h of concussion and again 1 week, 2 weeks, 1 month, and 2 months post-injury. Seven uninjured controls (20.0±4.5years) completed the same protocol in similar time increments...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28167051/does-dual-tasking-ability-change-with-age-across-childhood-and-adolescence-a-systematic-scoping-review
#15
REVIEW
Shikha Saxena, Eda Cinar, Annette Majnemer, Isabelle Gagnon
The aim of this literature search was to identify nature and extent of the evidence supporting the development of dual tasking skills in typically developing children. We systematically searched PsycINFO, Ovid and Pubmed for studies evaluating dual task performances of children and adolescents <18 years of age. 31 studies published in English from 1990 to 2016 were included. A descriptive analysis was used for data extraction and charting. Study findings reported that age influenced dual task performances under difficult or complex task conditions but they were found to be inconclusive when the tasks were equated at everyone's difficulty level...
February 3, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28160752/motor-preparation-rather-than-decision-making-differentiates-parkinson-s-disease-patients-with-and-without-freezing-of-gait
#16
John S Butler, Conor Fearon, Isabelle Killane, Saskia M Waechter, Richard B Reilly, Timothy Lynch
OBJECTIVE: Freezing of gait (FOG) is a brief, episodic phenomenon affecting over half of people with Parkinson's disease (PD) and leads to significant morbidity. The pathophysiology of FOG remains poorly understood but is associated with deficits in cognitive function and motor preparation. METHOD: We studied 20 people with PD (10 with FOG, 10 without FOG) and performed a timed response target detection task while electroencephalographic data were acquired. We analysed the data to detect and examine cortical markers of cognitive decision making (P3b or centroparietal positivity, CPP) and motor readiness potential...
December 28, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28157575/observing-prioritization-effects-on-cognition-and-gait-the-effect-of-increased-cognitive-load-on-cognitively-healthy-older-adults-dual-task-performance
#17
Linda M Maclean, Laura J E Brown, H Khadra, Arlene J Astell
Previous studies exploring the effects of attention-prioritization on cognitively healthy older adults' gait and cognitive dual task (DT) performance have shown DT cost in gait outcomes but inconsistent effects on cognitive performance, which may reflect task difficulty (the cognitive load). This study aimed to identify whether changing the cognitive load during a walking and counting DT improved the challenge/sensitivity of the cognitive task to observe prioritization effects on concurrent gait and cognitive performance outcomes...
January 24, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28157572/effects-of-singular-and-dual-task-constraints-on-motor-skill-variability-in-childhood
#18
Simone V Gill, Zoe Yang, Ya-Ching Hung
We examined the effects of singular versus dual task constraints involving upper and lower extremities in typically developing children in young (4-6 years old), middle (7-9 years old), and old (10-13 years old) age groups. The purposes of this study were: 1) to investigate the effects of singular upper and lower extremity and dual upper and lower extremity conditions on motor variability and 2) to examine if variability in children's motor actions would differ according to age (i.e., young, middle, or old)...
January 24, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28154547/gait-in-children-with-attention-deficit-hyperactivity-disorder-in-a-dual-task-paradigm
#19
Olivia Manicolo, Alexander Grob, Priska Hagmann-von Arx
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...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28151943/improving-posture-motor-dual-task-with-a-supraposture-focus-strategy-in-young-and-elderly-adults
#20
Shu-Han Yu, Cheng-Ya Huang
In a postural-suprapostural task, appropriate prioritization is necessary to achieve task goals and maintain postural stability. A "posture-first" principle is typically favored by elderly people in order to secure stance stability, but this comes at the cost of reduced suprapostural performance. Using a postural-suprapostural task with a motor suprapostural goal, this study investigated differences between young and older adults in dual-task cost across varying task prioritization paradigms. Eighteen healthy young (mean age: 24...
2017: PloS One
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