Evaluation of speed-accuracy trade-off in a computer task in individuals with cerebral palsy: a cross-sectional studyReport as inadecuate

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BMC Neurology

, 17:143

Movement disorders


BackgroundIndividuals with Cerebral Palsy CP present with sensorimotor dysfunction which make the control and execution of movements difficult. This study aimed to verify the speed-accuracy trade-off in individuals with CP.

MethodsForty eight individuals with CP and 48 with typical development TD were evaluated 32 females and 64 males with a mean age of 15.02 ± 6.37 years: minimum 7 and maximum 30 years. Participants performed the -Fitts’ Reciprocal Aiming Task v.1.0 Horizontal- on a computer with different sizes and distance targets, composed by progressive indices of difficulty IDs: ID2, ID4a and ID4b.

ResultsThere were no statistical differences between the groups in relation to the slope of the curve b1 and dispersion of the movement time r. However, the intercept b0 values presented significant differences F1.95 = 11.3; p = .001, with greater movement time in the CP group compared to the TD group. It means that for individuals with CP, regardless of index difficulty, found the task more difficult than for TD participants. Considering CP and TD groups, speed-accuracy trade-off was found when using different indices of difficulty ID2 and ID4. However, when the same index of difficulty was used with a larger target and longer distance ID4a or with a narrow target and shorter distance ID4b, only individuals with CP had more difficulty performing the tasks involving smaller targets. Marginally significant inverse correlations were identified between the values of b1 and age r = −0.119, p = .052 and between r and Gross Motor Function Classification System r = −0.280, p = .054, which did not occur with the Manual Ability Classification System.

ConclusionWe conclude that the individuals with CP presented greater difficulty when the target was smaller and demanded more accuracy, and less difficulty when the task demanded speed. It is suggested that treatments should target tasks with accuracy demands, that could help in daily life tasks, since it is an element that is generally not considered by professionals during therapy.

Trial registrationClinicalTrials.gov, NCT03002285, retrospectively registered on 20 Dec 2016.

KeywordsCerebral palsy Motor activity Disabled people Motor skills Abbreviationsb0Intercept

b1Slope of the curve

CPCerebral palsy

GMFCSGross motor function classification system

IDIndex of difficulty

ID2Index of difficult 2

ID4aIndex of difficult 4a

ID4bIndex of difficult 4b

MACSManual ability classification system

rDispersion of the movement time

TDTypical development

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Author: Deborah Cristina Gonçalves Luiz Fernani - Maria Tereza Artero Prado - Talita Dias da Silva - Thais Massetti - Luiz Car

Source: https://link.springer.com/

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