Change Detection on Periphery and Dual-Task Performance

2002 ◽  
Vol 46 (17) ◽  
pp. 1645-1648 ◽  
Author(s):  
Mon-Chu Chen ◽  
Filipe Fortes ◽  
Roberta Klatzky ◽  
William Long
Keyword(s):  
Reaction Time ◽  
Visual Field ◽  
Change Detection ◽  
Task Performance ◽  
Dual Task ◽  
Detection Rate ◽  
Peripheral Vision ◽  
Primary Task ◽  
Peripheral Stimulus ◽  
Dual Task Performance

A variation of the Wickens' Task was performed to examine the assumption that people can detect certain stimuli on their periphery without decreasing the performance of the primary task. Participants were instructed to respond to a change in a peripheral stimulus without shifting their gaze from a primary task in the center of their visual field. Our data suggests that both type and magnitude of change have a significant effect on detection rate and reaction time. The data also suggests that the performance of the primary task did not decay after the change of the stimuli occurred. Based on these findings, we argue that people can detect various types of changes without shifting gaze and without degrading task performance. Therefore, an interface particularly designed for peripheral vision is possible, and it will potentially provide benefits to both productivity and safety.

scholarly journals Dual task performance in Huntington’s disease: A comparison of choice reaction time tasks.

2015 ◽  
Vol 29 (5) ◽  
pp. 703-712 ◽  
Author(s):  
Eleftheria Vaportzis ◽  
Nellie Georgiou-Karistianis ◽  
Andrew Churchyard ◽  
Julie C. Stout
Keyword(s):  
Reaction Time ◽  
Huntington's Disease ◽  
Huntington’S Disease ◽  
Task Performance ◽  
Choice Reaction Time ◽  
Dual Task ◽  
Dual Task Performance

Effect of Template Complexity on Visual Search and Dual-Task Performance

2005 ◽  
Vol 16 (3) ◽  
pp. 208-213 ◽  
Author(s):  
Patrick A. Bourke ◽  
John Duncan
Keyword(s):  
Visual Search ◽  
Reaction Time ◽  
Task Performance ◽  
Dual Task ◽  
Search Time ◽  
Concurrent Task ◽  
Task Demands ◽  
Biased Competition ◽  
Task Control ◽  
Dual Task Performance

Even dissimilar tasks interfere with one another when done together. We used visual search to examine the underlying cause of such interference. In many models, visual search is a process of biased competition controlled by a template describing the target to be sought. When the display is processed, matching against this template guides attention to the target. We show that increasing template complexity increased interference with a dissimilar concurrent task, story memory. This result was independent of reaction time: Increases in template complexity were associated with no increase in search time in Experiment 1 and with a decrease in search time in Experiment 2. The results show that the dual-task demands of visual search reflect the complexity of the template used in task control, and that this factor can be isolated from other sources of difficulty.

scholarly journals Dual Task Performance in Normal Aging: A Comparison of Choice Reaction Time Tasks

PLoS ONE ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. e60265 ◽  
Author(s):  
Eleftheria Vaportzis ◽  
Nellie Georgiou-Karistianis ◽  
Julie C. Stout
Keyword(s):  
Reaction Time ◽  
Task Performance ◽  
Choice Reaction Time ◽  
Dual Task ◽  
Normal Aging ◽  
Dual Task Performance

Task Functional Demands as Factors in Dual-Task Performance

1977 ◽  
Vol 21 (5) ◽  
pp. 367-371 ◽  
Author(s):  
Robert A. North
Keyword(s):  
Reaction Time ◽  
Task Performance ◽  
Dual Task ◽  
Short Term Memory ◽  
Memory Function ◽  
Mutual Interference ◽  
Short Term ◽  
Term Memory ◽  
Dual Task Performance

Four tasks were tested in single and pairwise combined performances to investigate their mutual interference. The results demonstrate that functionally dissimilar tasks, in terms of the activities required in processing and responding, can be performed together with much less decrement than functionally identical tasks. The short-term memory function, furthermore, is extremely disruptive when required in one or both of two simultaneously performed discrete, reaction-time tasks.

scholarly journals Effects of two 24-week multimodal exercise programs on reaction time, mobility, and dual-task performance in community-dwelling older adults at risk of falling: a randomized controlled trial

2021 ◽  
Vol 21 (S2) ◽  
Author(s):  
Hugo Rosado ◽  
Jorge Bravo ◽  
Armando Raimundo ◽  
Joana Carvalho ◽  
José Marmeleira ◽  
...  
Keyword(s):  
Older Adults ◽  
Reaction Time ◽  
Task Performance ◽  
Dual Task ◽  
Intervention Program ◽  
Community Dwelling ◽  
Whole Body ◽  
Control Group ◽  
Dual Task Performance ◽  
Community Dwelling Older Adults

Abstract Background Falls in older adults are considered a major public health problem. Declines in cognitive and physical functions, as measured by parameters including reaction time, mobility, and dual-task performance, have been reported to be important risk factors for falls. The aim of this study was to investigate the effects of two multimodal programs on reaction time, mobility, and dual-task performance in community-dwelling older adults at risk of falling. Methods In this randomized controlled trial, fifty-one participants (75.4 ± 5.6 years) were allocated into two experimental groups (EGs) (with sessions 3 times per week for 24 weeks), and a control group: EG1 was enrolled in a psychomotor intervention program, EG2 was enrolled in a combined exercise program (psychomotor intervention program + whole-body vibration program), and the control group maintained their usual daily activities. The participants were assessed at baseline, after the intervention, and after a 12-week no-intervention follow-up period. Results The comparisons revealed significant improvements in mobility and dual-task performance after the intervention in EG1, while there were improvements in reaction time, mobility, and dual-task performance in EG2 (p ≤ 0.05). The size of the interventions’ clinical effect was medium in EG1 and ranged from medium to large in EG2. The comparisons also showed a reduction in the fall rate in both EGs (EG1: -44.2%; EG2: − 63.0%, p ≤ 0.05) from baseline to post-intervention. The interventions’ effects on reaction time, mobility, and dual-task performance were no longer evident after the 12-week no-intervention follow-up period. Conclusions The results suggest that multimodal psychomotor programs were well tolerated by community-dwelling older adults and were effective for fall prevention, as well as for the prevention of cognitive and physical functional decline, particularly if the programs are combined with whole-body vibration exercise. The discontinuation of these programs could lead to the fast reversal of the positive outcomes achieved. Trial registration ClinicalTrials.gov Identifier: NCT03446352. Date of registration: February 07, 2018.

Cost of Dual-Task Performance in Tactile Perception Is Greater for Competing Tasks of the Same Type

Perception ◽  
2020 ◽  
Vol 49 (5) ◽  
pp. 515-538
Author(s):  
Dacey Nguyen ◽  
James Brown ◽  
David Alais
Keyword(s):  
Task Performance ◽  
Dual Task ◽  
Secondary Task ◽  
Task Type ◽  
Primary Task ◽  
Left Hand ◽  
Dual Task Performance ◽  
Tactile Modality ◽  
The Right ◽  
Secondary Stimulus

This study examines dual-task performance in the tactile modality and tests whether dual-task cost depends on task type. Experiment 1 involved competing tasks of the same type, using a primary localisation task on the left hand and a secondary localisation task on the right hand. In Experiment 2, the primary task on the left hand remained the same, while an intensity discrimination task was used as the secondary task on the right hand. Subjects in both experiments completed three conditions: the primary task alone, a dual-task condition, and the primary task with the secondary stimulus present but no response required. Across both experiments, performance on the primary task was best when it was presented alone, and there was a performance decrement when the secondary stimulus was present but not responded to. Performance on the primary task was further decreased when participants had to respond to the secondary stimulus, and the decrease was larger when the secondary task was localisation rather than discrimination. This result indicates that task type in the tactile modality may modulate the attentional cost of dual-task performance and implies partially shared resources underlie localisation and intensity discrimination.

scholarly journals Adjustment of cognitive control to the frequency of dual-task interference

2019 ◽  
Author(s):  
Michal Olszanowski ◽  
Natalia Szostak
Keyword(s):  
Task Performance ◽  
Dual Task ◽  
Secondary Task ◽  
Control Experiment ◽  
Task Demands ◽  
Primary Task ◽  
Control Mechanisms ◽  
Dual Task Performance ◽  
High Level ◽  
Dual Task Interference

This study explored whether the control mechanisms recruited for optimising performance are similar for dual-task and interference-task settings. We tested whether the frequency of appearance of a secondary task resulted in an adjustment of anticipatory and reflexive forms of attentional control, as has been observed with other interference tasks (e.g. stroop and flanker). The results of two experiments demonstrated a proportion congruency effect (PCE): when a secondary task frequently appeared, primary task performance was slower. Additionally, there was a relative slowdown of dual-task performance in blocks wherein the secondary task appeared infrequently compared to blocks wherein it appeared frequently. However, this slowdown occurred when the primary task entailed a low level of control (Experiment 1) but was absent when it demanded a high level of control (Experiment 2). Overall, the results suggest that level of control can be adjusted to task demands related to the frequency of the secondary task.

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