scholarly journals How Many Trials Are Needed in Kinematic Analysis of a Reach-to-Grasp Task? - a Study in Persons With Stroke and Non-Disabled Controls

2021 ◽  
Author(s):  
Gunilla Elmgren Frykberg ◽  
Helena Grip ◽  
Margit Alt-Murphy
Keyword(s):  
Kinematic Analysis ◽  
Movement Time ◽  
Reach To Grasp ◽  
Good Reliability ◽  
Retest Reliability ◽  
Joint Coordination ◽  
Time To Peak ◽  
Stroke Group ◽  
Multiple Trials ◽  
Test Retest Reliability

Abstract Background Kinematic analysis of the 3D reach-to-grasp drinking task is recommended in stroke rehabilitation research. The number of trials required to reach performance stability, as an important aspect of reliability, has not been investigated. Thus, the aims of this study were to determine the number of trials needed to reach within-session performance stability and to investigate trends in performance over a set of trials in non-disabled people and in a sample of individuals with chronic stroke. In addition, the between-sessions test-retest reliability in persons with stroke was established. MethodsThe drinking task was performed at least 10 times, following a standardized protocol, in 44 non-disabled and 8 post-stroke individuals. A marker-based motion capture system registered arm and trunk movements during 5 pre-defined phases of the drinking task. Intra class correlation statistics were used to determine the number of trials needed to reach performance stability as well as to establish test-retest reliability. Systematic within-session trends over multiple trials were analyzed with a paired t-test. Results For most of the kinematic variables 2 to 3 trials were needed to reach good performance stability in both investigated groups. More trials were needed for movement times in reaching and returning phase, movement smoothness, time to peak velocity and inter-joint-coordination. A small but significant trend of improvement in movement time over multiple trials was demonstrated in the non-disabled group, but not in the stroke group. A mean of 3 trials was sufficient to reach good to excellent test-retest reliability for most of the kinematic variables in the stroke sample. Conclusions This is the first study that determines the number of trials needed for good performance stability (non-disabled and stroke) and test-retest reliability (stroke) for temporal, endpoint and angular metrics of the drinking task. For most kinematic variables, 3 trials are sufficient to reach good reliability. This knowledge can be used to guide future kinematic studies.

scholarly journals How many trials are needed in kinematic analysis of reach-to-grasp?—A study of the drinking task in persons with stroke and non-disabled controls

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Gunilla Elmgren Frykberg ◽  
Helena Grip ◽  
Margit Alt Murphy
Keyword(s):  
Kinematic Analysis ◽  
Movement Time ◽  
Reach To Grasp ◽  
Good Reliability ◽  
Retest Reliability ◽  
Joint Coordination ◽  
Time To Peak ◽  
Stroke Group ◽  
Multiple Trials ◽  
Test Retest Reliability

Abstract Background Kinematic analysis of the 3D reach-to-grasp drinking task is recommended in stroke rehabilitation research. The number of trials required to reach performance stability, as an important aspect of reliability, has not been investigated for this task. Thus, the aims of this study were to determine the number of trials needed for the drinking task to reach within-session performance stability and to investigate trends in performance over a set of trials in non-disabled people and in a sample of individuals with chronic stroke. In addition, the between-sessions test–retest reliability in persons with stroke was established. Methods The drinking task was performed at least 10 times, following a standardized protocol, in 44 non-disabled and 8 post-stroke individuals. A marker-based motion capture system registered arm and trunk movements during 5 pre-defined phases of the drinking task. Intra class correlation statistics were used to determine the number of trials needed to reach performance stability as well as to establish test–retest reliability. Systematic within-session trends over multiple trials were analyzed with a paired t-test. Results For most of the kinematic variables 2 to 3 trials were needed to reach good performance stability in both investigated groups. More trials were needed for movement times in reaching and returning phase, movement smoothness, time to peak velocity and inter-joint-coordination. A small but significant trend of improvement in movement time over multiple trials was demonstrated in the non-disabled group, but not in the stroke group. A mean of 3 trials was sufficient to reach good to excellent test–retest reliability for most of the kinematic variables in the stroke sample. Conclusions This is the first study that determines the number of trials needed for good performance stability (non-disabled and stroke) and test–retest reliability (stroke) for temporal, endpoint and angular metrics of the drinking task. For most kinematic variables, 3–5 trials are sufficient to reach good reliability. This knowledge can be used to guide future kinematic studies.

A new visual feedback-based system for the assessment of pinch force, endurance, accuracy and precision. A test-retest reliability study

Hand Therapy ◽  
2021 ◽  
pp. 175899832110025
Author(s):  
Alberto Dottor ◽  
Eleonora Camerone ◽  
Mirko Job ◽  
Diletta Barbiani ◽  
Elisa Frisaldi ◽  
...  
Keyword(s):  
Visual Feedback ◽  
Intraclass Correlation ◽  
Precision Grip ◽  
Voluntary Contraction ◽  
Good Reliability ◽  
Retest Reliability ◽  
Relative Reliability ◽  
Time Accuracy ◽  
In The Beginning ◽  
Test Retest Reliability

Introduction Given that pinch is a precision grip involved in sustained submaximal activities, a Sustained Contraction (SC) task could be associated to Maximal Voluntary Contraction (MVC). To better evaluate the thumb-index system, the test-retest reliability of pinch MVC and SC, measured by a visual feedback-based pinch gauge was assessed. Methods 26 healthy participants performed MVC and SC in two separate sessions. SC required to maintain 40%MVC as long as possible and it was evaluated in terms of time, accuracy (Mean Distance between force trace and target force, MD), precision (Coefficient of Variability of force trace, CV). MD and CV analyses were conducted dividing the SC task into three equivalent time stages (beginning, middle, exhaustion). Relative Reliability (RR) was measured by Intraclass Correlation Coefficient, and Absolute Reliability (AR) was measured by Standard Error of Measurement and by Bland-Altman plot. Results MVC and Time showed high RR and AR in both hands. RR of MD and CV in right hand was excellent in the beginning and middle stages, and fair in the exhaustion one, showing decreasing reliability as fatigue increases. In the left hand RR of MD and CV was generally lower. MD showed excellent reliability in the beginning stage and good reliability in the other stages. CV showed fair relative reliability at both beginning and middle stages, excellent in the last one. Conversely, it was observed high AR of MD and CV in all stages in both hands. Conclusions All indices are reliable to assess motor control of thumb-index pinch in both hands.

Test–Retest Reliability of the Twin Cities Walking Survey

2009 ◽  
Vol 6 (1) ◽  
pp. 119-131 ◽  
Author(s):  
Ann Forsyth ◽  
J. Michael Oakes ◽  
Kathryn H. Schmitz
Keyword(s):  
Physical Activity ◽  
International Physical Activity Questionnaire ◽  
Total Activity ◽  
Twin Cities ◽  
Kappa Statistics ◽  
Good Reliability ◽  
Retest Reliability ◽  
Social Features ◽  
Test Retest Reliability ◽  
Activity Questionnaire

Background:The Twin Cities Walking Study measured the associations of built environment versus socioeconomic and psychosocial variables with total physical activity and walking for 716 adults.Methods:This article reports on the test–retest reliability of the survey portion of the study. To test the reliability of the study measures, 158 respondents completed measures twice within 1 to 4 weeks. Agreement between participants’ responses was measured using Pearson r and Spearman rho, and kappa statistics.Results:Demographic questions are highly reliable (R > .8). Questions about environmental and social features are typically less reliable (rho range = 0.42– 0.91). Reliability of the International Physical Activity Questionnaire (last 7 days version) was low (rho = 0.15 for total activity).Conclusions:Much of the survey has acceptable-to-good reliability. The low test–retest reliability points to potential limitations of using a single administration of the IPAQ to characterize habitual physical activity. Implications for sound inference are accordingly complicated.

Diagnostic Interview for Genetic Studies (DIGS): Inter-rater and test-retest reliability and validity in a Spanish population

2007 ◽  
Vol 22 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Miguel Roca ◽  
Rocio Martin-Santos ◽  
Jerónimo Saiz ◽  
Jordi Obiols ◽  
Maria J. Serrano ◽  
...  
Keyword(s):  
Major Depression ◽  
Reliability And Validity ◽  
Kappa Statistic ◽  
Diagnostic Interview ◽  
Spanish Version ◽  
Spanish Population ◽  
Good Reliability ◽  
Retest Reliability ◽  
Kappa Value ◽  
Test Retest Reliability

AbstractObjectiveTo test the reliability and validity of the DIGS in Spanish population.MethodsInter-rater and test-retest reliability of the Spanish version of DIGS was tested in 95 inpatients and outpatients. The resultant diagnoses were compared with diagnoses obtained by the LEAD (Longitudinal Expert All Data) procedure as “gold standard”. The kappa statistic was used to measure concordance between blind inter-raters and between the diagnoses obtained by LEAD procedure and through the DIGS.ResultsOverall kappa coefficient for inter-rater reliability was 0.956. The kappa value for individual diagnosis varied from major depression = 0.877 to schizophrenia = 1. Test-retest reliability was 0.926. Kappa for all individual target diagnoses ranged from 0.776 (major depression) to 1. Kappa between LEAD procedure and DIGS ranged from 0.704 (major depression) to 0.825 (bipolar I disorder).ConclusionMost of the DSM-IV major psychiatric disorders can be assessed with acceptable to excellent reliability with the Spanish version of the DIGS interview. The Spanish version of DIGS showed an acceptable to excellent concurrent validity. Giving the good reliability and validity of Spanish version of DIGS it should be considered to identify psychiatric phenotypes for genetics studies.

scholarly journals Reliability of the Polar Vantage M Sports Watch when Measuring Heart Rate at Different Treadmill Exercise Intensities

Sports ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 117
Author(s):  
Mike Climstein ◽  
Jessica L. Alder ◽  
Alyce M. Brooker ◽  
Elissa J. Cartwright ◽  
Kevin Kemp-Smith ◽  
...  
Keyword(s):  
Heart Rate ◽  
Treadmill Exercise ◽  
Intraclass Correlation ◽  
Good Test ◽  
Good Reliability ◽  
Measurement Variability ◽  
Retest Reliability ◽  
Activity Monitors ◽  
Test Retest Reliability ◽  
Standard Error Of Measurement

Background: Usage of wrist-worn activity monitors has rapidly increased in recent years, and these devices are being used by both fitness enthusiasts and in clinical populations. We, therefore, assessed the test–retest reliability of the Polar Vantage M (PVM) watch when measuring heart rate (HR) during various treadmill exercise intensities. Methods: HR was measured every 30 s (simultaneous electrocardiography (ECG) and PVM). Test–retest reliability was determined using an intraclass correlation coefficient (ICC) with 95% confidence intervals (CIs). Standard error of measurement (SEM) and smallest real difference (SRD) were used to determine measurement variability. Results: A total of 29 participants completed the trials. ICC values for PVM during stages 1, 2 and 5 demonstrated good to excellent test–retest reliability (0.78, 0.78 and 0.92; 95% CI (0.54–0.90, 0.54–0.9, 0.79–0.97)). For PVM during stages 0 (rest), 3 and 4, the ICC values indicated poor to good reliability (0.42, 0.68 and 0.58; 95% CI (−0.27–0.73, 0.32–0.85, 0.14–0.80)). Conclusion: This study identified that the test–retest reliability of the PVM was comparable at low and high exercise intensities; however, it revealed a poor to good test–retest reliability at moderate intensities. The PVM should not be used in a clinical setting where monitoring of an accurate HR is crucial to the patients’ safety.

MOVEMENT MEASUREMENT VALIDITY AND RELIABILITY OF THE IMAGE J PROGRAM FOR KINEMATIC ANALYSIS

2016 ◽  
Vol 16 (08) ◽  
pp. 1640028 ◽  
Author(s):  
JEONG J. LEE ◽  
JOSHUA H. YOU
Keyword(s):  
Motion Analysis ◽  
Kinematic Analysis ◽  
Motion Analysis System ◽  
Validity And Reliability ◽  
Retest Reliability ◽  
Dynamic Movement ◽  
Angle Data ◽  
Hemiparetic Stroke ◽  
Analysis System ◽  
Test Retest Reliability

Background: While advanced motion analysis systems can provide accurate kinematic information, the majorities of motion analysis systems are stationary, expensive and time consuming. Image J is a Java-based image processing program that was originally developed at the National Institutes of Health and has rapidly gained widespread acceptance among rehabilitation specialists as a portable and affordable alternative motion analysis system. However, the validity and reliability of the Image J program have not been well established. Objective: The purpose of this study was to investigate the validity and test–retest reliability of the Image J kinematic analysis system. The Image J kinematic analysis system is designed to produce precise kinematic evidence during normal and pathological static and dynamic movement patterns. Methods: The Image J motion analysis system was concurrently compared with the electrogoniometer system as a reference standard measure by obtaining sagittal kinematic knee joint angle data. Results: Image J motion analysis system measurement revealed outstanding validity ([Formula: see text] and [Formula: see text]). The test–retest reliability for kinematic knee angle data showed remarkable consistency (Cronbach’s [Formula: see text]). Conclusions: This study provides the first evidence highlighting the Image J kinematic analysis system’s excellent validity and reliability for evaluating human kinematic movements in elderly people with hemiparetic stroke.

scholarly journals Test-Retest and Interrater Reliability of the Functional Movement Screen

2013 ◽  
Vol 48 (3) ◽  
pp. 331-336 ◽  
Author(s):  
Rebecca Shultz ◽  
Scott C. Anderson ◽  
Gordon O. Matheson ◽  
Brandon Marcello ◽  
Thor Besier
Keyword(s):  
Interrater Reliability ◽  
Intraclass Correlation ◽  
Video Recording ◽  
Functional Movement Screen ◽  
Good Test ◽  
Good Reliability ◽  
Functional Movement ◽  
Retest Reliability ◽  
Test Retest Reliability ◽  
First Session

Context: The Functional Movement Screen (FMS) is a popular test to evaluate the degree of painful, dysfunctional, and asymmetric movement patterns. Despite great interest in the FMS, test-retest reliability data have not been published. Objective: To assess the test-retest and interrater reliability of the FMS and to compare the scoring by 1 rater during a live session and the same session on video. Design: Cross-sectional study. Setting: Human performance laboratory in the sports medicine center. Patients or Other Participants: A total of 21 female (age = 19.6 ± 1.5 years, height = 1.7 ± 0.1 m, mass = 64.4 ± 5.1 kg) and 18 male (age = 19.7 ± 1.0 years, height = 1.9 ± 0.1 m, mass = 80.1 ± 9.9 kg) National Collegiate Athletic Association Division IA varsity athletes volunteered. Intervention(s): Each athlete was tested and retested 1 week later by the same rater who also scored the athlete's first session from a video recording. Five other raters scored the video from the first session. Main Outcome Measure(s): The Krippendorff α (K α) was used to assess the interrater reliability, whereas intraclass correlation coefficients (ICCs) were used to assess the test-retest reliability and reliability of live-versus-video scoring. Results: Good reliability was found for the test-retest (ICC = 0.6), and excellent reliability was found for the live-versus-video sessions (ICC = 0.92). Poor reliability was found for the interrater reliability (K α = .38). Conclusions: The good test-retest and high live-versus-video session reliability show that the FMS is a usable tool within 1 rater. However, the low interrater K α values suggest that the FMS within the limits of generalization should not be used indiscriminately to detect deficiencies that place the athlete at greater risk for injury. The FMS interrater reliability may be improved with better training for the rater.

scholarly journals The Personality Beliefs Questionnaire in borderline personality disorder (PBQ-BPD): adaptation for Russian-speaking selection

2016 ◽  
Vol 24 (3) ◽  
pp. 126-143 ◽  
Author(s):  
M.A. Konina ◽  
A.B. Kholmogorova
Keyword(s):  
Borderline Personality Disorder ◽  
Personality Disorder ◽  
Borderline Personality ◽  
Factorial Structure ◽  
Good Reliability ◽  
Retest Reliability ◽  
Internet Users ◽  
Internal Coherence ◽  
Test Retest Reliability ◽  
Personality Beliefs

This study presents the results of the Personality Beliefs Questionnaire (PBQ-BPD; Butler, Brown, Beck, & Grisham, 2002) adaptation in the Russian-speaking sample of 608 people. The initial three-factorial structure of PBQ-BPD in the sample of 543 Internet users is confirmed. It is shown that 14 items form three factors: relating respectively to distrust (reflects the belief connected with expectation of exploitation and treachery), dependency (it is shown in the belief connected with feeling of helplessness without continued support) and protection (belief that one should act preemptively to avoid threat). The PBQ-SF scales showed good reliability and correlated significantly with psychopathological manifestations on SCL-90-R scale. Internal coherence and split reliability of the scale were checked in the sample of 608 people, and made up 0,893 and 0,784 respectively. Test-retest reliability of the questionnaire was established in group of 30 people and made up 0,754.

scholarly journals Measuring the Impact of Advertisement on Children Diet Choice in the Pediatric Population.

2020 ◽  
Author(s):  
José Antonio Ponce-Blandón ◽  
Macarena Romero-Martín ◽  
Juan Gómez-Salgado ◽  
Nerea Jiménez-Picón ◽  
Lucía Ramírez-Baena ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Pediatric Population ◽  
Television Advertising ◽  
Selection Method ◽  
Food Advertising ◽  
Good Reliability ◽  
Retest Reliability ◽  
Interclass Correlation ◽  
Test Retest Reliability ◽  
The Impact

Abstract Background: The aim of this study was to evaluate the test–retest reliability of the paired selection method for measuring the impact of food advertising on the consumption preferences of children. Methods: In this study, 52 children aged 4 to 6 years participated in watching an advertisement style video showing four foodstuffs with low nutritional value. Two pollsters were introduced at two instances showing pairs of pictures of the advertised foodstuffs right next to similar products, so that children could express their preferences. The test–retest reliability was measured through the concordance and interclass co-relation between both answers. Results: Kappa concordance indices of 0.71 (0.46–0.97), 0.88 (0.62–1.15), and 0.90 (0.64–1.16) were obtained for the three foodstuff pairs. The interclass correlation coefficient for the sum of manifested preferred scores was 0.72 (p = 0.0000). Conclusions: The paired selection method has been demonstrated to be efficient with good or very good reliability, making it useful for measuring the impact of food advertising on this age group. Keywords: food advertising; food habits; childhood obesity; television advertising; assessment.

scholarly journals Test–retest reliability of contrast visual acuities in a clinical population

2017 ◽  
Vol 76 (1) ◽  
Author(s):  
Anusha Y. Sukha ◽  
Alan Rubin
Keyword(s):  
Middle Age ◽  
Age Groups ◽  
Clinical Population ◽  
Contrast Level ◽  
Predictive Tool ◽  
Good Reliability ◽  
Sample Mean ◽  
Retest Reliability ◽  
And Gender ◽  
Test Retest Reliability

Background: Previously, contrast visual acuities (VA) have been evaluated as a potential screening, diagnostic and predictive tool in cases where standard visual acuity remains intact. Issues around contrast acuity sometimes make it difficult for clinicians to make appropriate clinical decisions and thus such tests have to be standardised and reliable.Aim: To investigate test–retest reliability of contrast VA in healthy adults in a clinical setting.Methods: Best compensated contrast VA at 100%, 10%, 5% and 2.5% of 155 patients (mean age 39.7 ± 12.2 years) were measured using the computerised Thomson Test Chart 2000 Expert. For all participants and at each contrast level, two measurements per right eye were determined. Test–retest reliability for the four contrast levels were assessed using reliability coefficients and Bland–Altman plots. Participants were also divided into three age groups of young (18–39 years, n = 72), middle-age (40–49 years, n = 45) and elderly (50–67 years, n = 38) and reliability was assessed within and between age and gender groups.Results: For the whole-sample test and retest, measurements within each contrast level were not statistically different (p ≥ 0.05). Thus, test and retest measurements per participant were averaged and whole-sample mean-contrast VA and standard deviations for 100%, 10%, 5% and 2.5% were -0.146 ± 0.060, 0.050 ± 0.071, 0.135 ± 0.079 and 0.405 ± 0.115 logMAR, respectively. Significant differences were found between all pairs of contrast levels compared (p ≤ 0.0125). Mean-contrast VA within each age group were also significantly different across all contrast levels (p < 0.0001). Mean-contrast VA at each contrast level between the age groups indicated that mean-contrast VA were not significantly different between the young and middle-age groups (p > 0.05) but were statistically different between the young and elderly groups (p < 0.01). Only mean-contrast VA 10% was significantly different between the middle-age and elderly groups (p < 0.001). Also, mean-contrast VA for the four contrast levels within gender were significantly different (p ≤ 0.05) but not between genders (p ≥ 0.05).Conclusion: This study found good reliability of test and retest measurements of contrast VA in an adult clinical population.

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