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.

scholarly journals Bayley III in Vietnamese children: lessons for cross-cultural comparisons

2019 ◽  
Vol 4 ◽  
pp. 98 ◽  
Author(s):  
Luning Sun ◽  
Saraswathy Sabanathan ◽  
Pham Ngoc Thanh ◽  
Anh Kim ◽  
To Thi Mai Doa ◽  
...  
Keyword(s):  
Construct Validity ◽  
Age Groups ◽  
Fine Motor ◽  
General Factor ◽  
Theoretical Understanding ◽  
Retest Reliability ◽  
Gender Invariance ◽  
And Gender ◽  
Latent Traits ◽  
Test Retest Reliability

Background: There are limited psychometric reports of construct validity following adaptation of the Bayley Scales of Infant and Toddler Development 3rd edition (Bayley III). This paper aims to demonstrate a process of assessing reliability, validity, and gender equivalence of the adapted tool for Vietnamese children. Methods: We evaluated cognitive, fine motor, gross motor, expressive communication and receptive communication subtests of the adapted tool in 267 healthy urban Vietnamese children. Subsets of participants were used to evaluate inter-observer and test-retest reliability. Confirmatory factor analysis (CFA) was carried out to evaluate construct validity and measurement invariance between genders. Results: The adaptation demonstrated good inter-observer and test-retest reliability. CFA indicated that a construct representing a single underlying factor showed the best fit, although relationships between the observed scores and the latent traits underlying the scores varied between age groups. Within age groups, relationships between observed scores and these factors were not significantly influenced by gender. Conclusions: The Vietnamese Bayley III demonstrated good internal consistency and reliability. A latent structure with one general factor and additional residual correlations that change with age is supported by the theoretical understanding of child development. This is the first study to demonstrate gender invariance by age group. This adaptation is suitable for further research studies in urban Vietnamese children, but further work is needed to extend its applicability more broadly across Vietnam.

Test-Retest Reliability of the Revised Children's Manifest Anxiety Scale

1987 ◽  
Vol 65 (1) ◽  
pp. 67-70 ◽  
Author(s):  
Jack J. Wisniewski ◽  
Judy L. Genshaft ◽  
James A. Mulick ◽  
Daniel L. Coury
Keyword(s):  
Small Difference ◽  
Anxiety Scale ◽  
Eighth Grade ◽  
Good Reliability ◽  
Sample Mean ◽  
Retest Reliability ◽  
Two Samples ◽  
Test Retest Reliability ◽  
Test Use ◽  
Manifest Anxiety

Test-retest reliabilities of the Revised Children's Manifest Anxiety Scale over 1- and 5-wk. intervals were examined for two samples of students, 73 boys and 88 girls in regular sixth, seventh and eighth grade classrooms (11 yr. to 14 yr). For raw scores the test-retest Pearson r was .88 (1-wk.) and .77 (5-wk.), indicating good reliability. For both samples there was a small difference between test (12.2 for 1-wk. sample; 11.4 for 5-wk. sample) and retest (11.2 for 1-wk. sample; 9.8 for 5-wk. sample) mean raw scores. Implications for test use are discussed.

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.

scholarly journals Validation of the Arabic version of the Ocular Surface Disease Index Questionnaire

2021 ◽  
Vol 14 (10) ◽  
pp. 1595-1601
Author(s):  
May M. Bakkar ◽  
◽  
Mohammad Al Qadire ◽  
Keyword(s):  
Internal Consistency ◽  
Ocular Surface ◽  
Disease Index ◽  
Ocular Surface Disease ◽  
Clinical Population ◽  
Arabic Version ◽  
Ocular Surface Disease Index ◽  
Retest Reliability ◽  
Test Retest Reliability ◽  
Acceptable Internal Consistency

AIM: To develop an Arabic version of the ocular surface disease index (OSDI) and to assess its reliability and validity. METHODS: A cross sectional study was carried out to validate the Arabic version of the OSDI questionnaire. Initially, forward-backward translation was used to translate the English version of OSDI into Arabic. The translated questionnaire was tested for equivalence and cultural adaptability. Totally 200 subjects were then recruited from a non-clinical population and asked to complete the Arabic version of the OSDI (ARB-OSDI). The reliability of the questionnaire was assessed using Cronbach’s-α. A subgroup of 30 participants was asked to complete the questionnaire on two occasions to test the test-retest reliability. RESULTS: A total of 200 participants were enrolled in the study. The average age of the study participants was 31.21±13.2y and 57% were male. An acceptable internal consistency level for the ARB-OSDI questionnaire measured by Cronbach’s-α was revealed. All questions showed good internal consistency. Test-retest reliability analysis revealed good stability (interclass correlation coefficient, r=0.832, P<0.001). The construct validity for the questionnaire was also high. CONCLUSION: The ARB-OSDI questionnaire shows very good psychometric properties (acceptable internal consistency and test-retest reliability). That makes the questionnaire a valid potential tool to use in Arabic-speaking countries to monitor symptoms of dry eye disease in a larger population.

scholarly journals Computerized Symbol Digit Modalities Test in a Swiss Pediatric Cohort Part 1: Validation

2021 ◽  
Vol 12 ◽  
Author(s):  
Céline Hochstrasser ◽  
Sarah Rieder ◽  
Ursina Jufer-Riedi ◽  
Marie-Noëlle Klein ◽  
Anthony Feinstein ◽  
...  
Keyword(s):  
High Reliability ◽  
Age Groups ◽  
Reliable Change Index ◽  
Information Processing Speed ◽  
Retest Reliability ◽  
Norm Values ◽  
Significant Difference ◽  
Test Retest Reliability ◽  
The University ◽  
Mean Time

ObjectiveThe objective of this study was to validate the computerized Symbol Digit Modalities Test (c-SDMT) in a Swiss pediatric cohort, in comparing the Swiss sample to the Canadian norms. Secondly, we evaluated sex effects, age-effects, and test–retest reliability of the c-SDMT in comparison to values obtained for the paper and pencil version of the Symbol Digit Modalities Test (SDMT).MethodsThis longitudinal observational study was conducted in a single-center setting at the University Children’s Hospital of Bern. Our cohort consisted of 86 children (45 male and 41 female) aged from 8 to 16 years. The cohort included both healthy participants (n = 38) and patients (n = 48) hospitalized for a non-neurological disease. Forty eight participants were assessed during two testing sessions with the SDMT and the c-SDMT.ResultsTest–retest reliability was high in both tests (SDMT: ICC = 0.89, c-SDMT: ICC = 0.90). A reliable change index was calculated for the SDMT (RCIp = −3.18, 14.01) and the c-SDMT (RCIp = −5.45, 1.46) corrected for practice effects. While a significant age effect on information processing speed was observed, no such effect was found for sex. When data on the c-SDMT performance of the Swiss cohort was compared with that from a Canadian cohort, no significant difference was found for the mean time per trial in any age group. Norm values for age groups between 8 and 16 years in the Swiss cohort were established.ConclusionNorms for the c-SDMT between the Swiss and the Canadian cohort were comparable. The c-SDMT is a valid alternative to the SDMT. It is a feasible and easy to administer bedside tool due to high reliability and the lack of motor demands.

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.

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