Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
96 participants
INTERVENTIONAL
2016-01-31
2016-11-30
Brief Summary
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Detailed Description
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This instrument can be used to verify motor control through analysis of the speed and accuracy of movement, which can be determined through the log-linear relation between movement time and task difficulty using a mathematical equation, and analyzed by Fitts' law, which describes the relation between movement accuracy and speed, associated with target size and distance11. Thus, the task used in this study was composed of targets of different sizes, being that the smaller targets require more time to execute due to the necessity of increased accuracy and, if the distance between targets reduces, the speed of movement becomes greater and the accuracy decreases.
In relation to target size (W) and distance between targets (D), the equation log2 (2D/W) results in an index of difficulty (ID), where the higher the ID, the more difficult the task, a fact that necessitates greater movement time.
To evaluate the speed and accuracy, two different indices of difficulty were used in this study (ID2 and ID4). The difficulty level was increased by changing the width and distance between the bars. In addition, ID4 was used in two different ways (ID4a and ID4b), for which the distance between the bars and the width were different, but the ID was maintained.
3 Procedure and design The experiment was composed of three trials at each of the two IDs: 2 and 4 (ID 4 had two kinds of measurement - ID4a and ID4b), and the participants performed the tasks individually in a room, with only the evaluator present, seated on a chair (or their own wheelchair), which was adjusted in height according to the needs of the individual. A footrest was available, when necessary. The computer was placed on a table, and each participant was given instructions and presented with the task, in which the individual, after hearing an alarm from the computer, was required to click with an external mouse cursor on two parallel bars which were arranged vertically, intermittently, with the greatest speed and accuracy possible, for a period of 10 seconds, followed by a second alarm which indicated the end of the attempt.
Directly following the attempt, the total movement time was registered, by dividing the seconds obtained in each attempt by the number of "clicks" on targets. If more than two clicks were wrong, the individual repeated the task.
Procedure and design The experiment was composed of three trials at each of the two IDs: 2 and 4 (ID 4 had two kinds of measurement - ID4a and ID4b), and the participants performed the tasks individually in a room, with only the evaluator present, seated on a chair (or their own wheelchair), which was adjusted in height according to the needs of the individual. A footrest was available, when necessary. The computer was placed on a table, and each participant was given instructions and presented with the task, in which the individual, after hearing an alarm from the computer, was required to click with an external mouse cursor on two parallel bars which were arranged vertically, intermittently, with the greatest speed and accuracy possible, for a period of 10 seconds, followed by a second alarm which indicated the end of the attempt.
Directly following the attempt, the total movement time was registered, by dividing the seconds obtained in each attempt by the number of "clicks" on targets. If more than two clicks were wrong, the individual repeated the task.
Conditions
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Study Design
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NON_RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Cerebral Palsy group
Group with Cerebral Palsy that performed the Fitts law in a computer task
Cerebral Palsy group
Group with Cerebral Palsy that performed the Fitts law in a computer task
Control group
Group with typical development that performed the Fitts law in a computer task
Control group
Group with typical development that performed the Fitts law in a computer task
Interventions
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Cerebral Palsy group
Group with Cerebral Palsy that performed the Fitts law in a computer task
Control group
Group with typical development that performed the Fitts law in a computer task
Eligibility Criteria
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Inclusion Criteria
* levels I to IV according to the GMFCS;
* levels I to III according to MACS.
Exclusion Criteria
* lack of comprehension of the experimental instructions.
7 Years
30 Years
ALL
Yes
Sponsors
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University of Sao Paulo
OTHER
Responsible Party
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Carlos Bandeira de Mello Monteiro
Associate Professor
Principal Investigators
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Carlos BM Monteiro, Ph.D.
Role: PRINCIPAL_INVESTIGATOR
University of Sao Paulo
References
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Fernani DCGL, Prado MTA, da Silva TD, Massetti T, de Abreu LC, Magalhaes FH, Dawes H, de Mello Monteiro CB. Evaluation of speed-accuracy trade-off in a computer task in individuals with cerebral palsy: a cross-sectional study. BMC Neurol. 2017 Jul 27;17(1):143. doi: 10.1186/s12883-017-0920-4.
Other Identifiers
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14652713.9.0000.0082
Identifier Type: -
Identifier Source: org_study_id