Test-retest Correlation Research Articles

Adaptation of the Social Determinants of Health Scale for University Students to Turkish: A Validity and Reliability Study

Aim: Focusing, researching, identifying and producing solutions for the social health needs of university students is an important step in terms of individual and public health. The main purpose of this study is to make the Turkish adaptation of the social determinants of health scale and psychometric analyses to identify university students who are at risk for their social health needs and to solve their problems. Method: The social determinants of health scale for university students was administered to 322 students. For the validity of the scale, content validity index, confirmatory factor analysis, similarity, and discriminant validity coefficients were used, while for reliability, item-total correlations, internal consistency coefficient, and test-retest analysis were utilized. Results: The content validity index of the Turkish form of the social determinants of health scale for university students was found to be 0.89, and it was decided that there was a consensus among experts. The test-retest reliability correlation was 0.81 and the Cronbach alpha reliability coefficient was 0.71, which was found to be a reliable scale. The scale, which consists of three sub-dimensions measuring general social health needs, social health needs of university students, and promotive social health factors, was compatible with its original form. Conclusion: The social determinants of the health scale for university students were found to be valid and reliable for Turkish culture. It is thought that it will be useful in determining the social health needs of university students.

Validity and reliability of the Foot Care Scale for Older Diabetics in Turkish society.

Older patients with diabetes have behaviors and practices in foot care that differ from those of younger patients. There is a need for a tool to assess the foot care of patients with diabetes who are over the age of 65 years. This study aimed to assess the validity and reliability of the long and short versions of the Foot Care Scale for Older Diabetics (FCS-OD) in Turkish society. A total of 172 older patients with diabetes participated in the study. Language validity, content validity, construct validity, Cronbach's alpha coefficient value, item-scale correlations, parallel form reliability, and test-retest correlations were used to assess the Turkish version of FCS-OD. A patient identification form, FCS-OD, Diabetic Foot Care Self-Efficacy Scale, and Foot Self-Care Behavior Scale were used for data collection. Turkish versions of the FCS-OD, both short and long versions, were at acceptable levels regarding their content (content validity index: 0.964, 0.975) and construct (factor loadings > 0.4). Both versions of the scale showed a high level of internal consistency as demonstrated by Cronbach's alpha values (short version, 0.802; long version, 0.905) and item-scale correlations (> 0.3). Both versions of the scale were stable over time and compared to the parallel forms. Both versions of the scale were found to be valid and reliable for Turkish society with regard to psychometric properties.

Translation, Cross-Cultural Adaptation, and Psychometric Properties of the Revised Fibromyalgia Impact Questionnaire (FIQR) for Use in Arabic-Speaking Patients in Saudi Arabia.

Fibromyalgia (FM) is a complex and debilitating condition that significantly impacts patients' daily lives. The continuous assessment of the impact and severity of FM is essential to manage the condition effectively. Assessment tools in Arabic are lacking for use in Saudi Arabia, which might lead to ineffective management. This study aimed to translate and cross-culturally adapt and validate the Arabic version of the Revised Fibromyalgia Impact Questionnaire (FIQR). Following translation guidelines, 2 Arabic translators and 2 English-certified translators performed forward and backward translations of the FIQR. In a cross-sectional study design, the questionnaire was piloted with 5 participants and then subjected to cognitive interviews and psychometric analysis. Participants were FM patients recruited from a University Hospital in Riyadh and FM support groups in Saudi Arabia. The internal consistency, and reliability using the Cronbach α and interclass correlation coefficient (ICC) of 2-week test-retest, and criterion validity were evaluated. The results included a total of 42 participants with FM. Six minor modifications were made during the stepwise translation of the questionnaire. The Arabic version of the FIQR had good internal consistency and test-retest reliability, with a Cronbach α of 0.855 for the physical functioning domain, 0.663 for overall well-being, 0.803 for symptoms, and 0.895 for the total FIQR, and the Pearson correlation coefficient of the ICC for physical functioning was 0.769 (95% confidence interval (CI), 0.541-0.884) for the overall well-being domain, 0.555 (95% CI, 0.129-0.772) for the symptoms domain, and 0.720 (95% CI, 0.370-0.868) and 0.794 (95% CI, 0.579-0.899) for the total FIQR score (p < 0.001), respectively. The Arabic version of the FIQR is a valid, reliable, and practical tool for assessing the impact of FM on Arabic-speaking patients and potentially contributing to the improvement of FM outcomes.

Validity and Reliability of the Korean Versions of the 9- and 19-Item Wearing-Off Questionnaires in Parkinson's Disease.

The wearing-off (WO) phenomenon is the most common motor complication in advanced Parkinson's disease (PD), but its identification remains challenging. The 9- and 19-item Wearing-off Questionnaires (WOQ-9 and WOQ-19) are self-assessment tools for motor and nonmotor symptoms that are widely used for WO screening. We produced Korean versions of the WOQ-19 and WOQ-9 (K-WOQ-19 and K-WOQ-9) and investigated their validity and reliability. We used the translation-back translation method to produce K-WOQ-19 and K-WOQ-9, which were self-administered by 124 patients with PD. We conducted in-depth 10-minute interviews for confirming the presence of the WO phenomenon, and then stratified the participants into groups with and without WO. Diagnostic accuracy was assessed byanalyzing receiver operating characteristic curves. Concurrent validity was assessed using the Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) andthe Hoehn and Yahr stage with Spearman's rank correlation analysis. Reliability was assessedbased on test-retest Cohen's kappa (κ) values and intraclass correlation coefficients (ICCs). The optimal cutoff scores on the K-WOQ-19 and K-WOQ-9 for WO screening were 4 and 2, respectively. The test-retest ICCs of K-WOQ-19 and K-WOQ-9 were 0.943 and 0.938, respectively. Nineteen of the combined 20 items in K-WOQ-19 and K-WOQ-9 showed moderate-to-substantial agreement (κ=0.412-0.771, p<0.001). The scores on the translated scales were significantly correlated with MDS-UPDRS IV scores. K-WOQ-19 and K-WOQ-9 are reliable and valid tools for detecting WO, with optimal cutoff scores of 4 and 2, respectively.

Validity of self-reported sleep duration in the Cancer Prevention Study- 3.

We examined the one-year test re-test reliability and validity criterion of survey-assessed sleep duration collected from two separate questions. The Activity Validation Sub Study included 751 participants of the Cancer Prevention Study-3 study to further investigate rest/activity cycles. Sleep duration was collected using three methods: survey, Daysimeter device, and sleep diary. Survey-assessed sleep duration was collected using 2 different questions, each with different response options (categorical and continuous). Selected participants (n = 170) were asked to wear a Daysimeter device for seven consecutive days for two non-consecutive quarters. Participants were excluded from the current study due to incomplete/implausible survey or device data or reported working night shift. We calculated reliability of pre- and post-survey sleep duration for both survey question using Spearman correlation. We used the method of triads to estimate the validity coefficient (VC) between the three sleep duration measurements in the present study and the "true" latent sleep duration measure, and bootstrapping methods to calculate the 95% confidence intervals (95%CI). Of 119 participants included in the study (52.10% male), test-retest correlation showed strong and moderate correlations for sleep duration collected continuously and categorically, respectively. The VC for survey-assessed continuous sleep duration was 0.82 (95%CI 0.71, 0.90) for weekday and 0.68 (95%CI 0.46, 0.83) for weekend. Performance of the VC was slightly weaker for survey-assessed categorical sleep duration (weekday VC = 0.57 95%CI 0.42, 0.71; weekend VC = 0.47 95%CI 0.29, 0.62). The two survey-assessed sleep duration questions used in the AVSS and CPS-3 cohorts are valid approximations of sleep duration.

The Adolescent Insomnia Questionnaire: the Turkish validity and reliability study.

This study aimed to evaluate the Turkish validity and reliability of the Adolescent Insomnia Questionnaire. The study was carried out with 265 adolescents. Data were collected with the Adolescent Insomnia Questionnaire and the Cleveland Adolescent Sleepiness Questionnaire. Exploratory factor analysis and confirmatory factor analysis were used to analyze the construct validity of Adolescent Insomnia Questionnaire. The scale reliability was tested using test-retest, Cronbach's α test, Pearson correlation analysis, and inter-item correlation analysis. The Cronbach's α coefficients were found to be above 0.80 for all sub-dimensions and the total scale. Correlations between Adolescent Insomnia Questionnaire and Cleveland Adolescent Sleepiness Questionnaire scores were positively highly significant. The test-retest correlation analysis of Adolescent Insomnia Questionnaire was 0.675. The results of confirmatory factor analysis were χ2/df=2.861, comparative fit index=0.966, incremental fit index=0.966, Tucker-Lewis index=0.956, normed fit index=0.949, root-mean-square error of approximation=0.084. The suitability of the data for exploratory factor analysis was evaluated with Bartlett's test of sphericity (p<0.05), and the sample adequacy was evaluated with the Kaiser-Meyer-Olkin test (0.77). The Adolescent Insomnia Questionnaire Turkish version is a valid and reliable tool for measuring insomnia in adolescents aged 11-18 years. Adolescent Insomnia Questionnaire is a brief, practical, self-reported, age-appropriate, easily applicable, valid, and reliable tool in Turkish. This is the first Turkish validity and reliability study of Adolescent Insomnia Questionnaire.

Temporal stability of optimism and pessimism (LOT-R) over 6 years in the general population.

The aims of this study were to examine changes in habitual optimism over a six-year period and to analyze the relationship between changes in optimism and changes in other quality of life-related variables. A randomly selected community sample of the German adult general population (N = 4,965) was surveyed twice, with a time interval of 6.04 years. During the course of the 6 years, the mean score of the LOT-R total scale improved (effect size d = 0.11). The temporal stability in terms of the test-retest correlation was r = 0.61 for the total sample. There were only marginal gender differences in this temporal stability, however, the stability in the oldest age group ≥70 years (r = 0.50) was lower than the stability of the other age groups. The cross-sectional correlations showed clear relationships between optimism on the one hand and quality of life, life satisfaction, social support, and low levels of anxiety and physical complaints on the other. The corresponding longitudinal correlations between changes in optimism and changes in the other variables were less pronounced, but in the same direction. The study confirmed the applicability of the LOT-R in longitudinal studies. In samples with participants of 70 years and above, the limited stability in the optimism assessments needs to be considered in clinical practice and epidemiologic research.

Mapping of Communication in Space Crews

(1) Background: Starting in 1993, the sociomapping method was used in the Czech Army to map communication. After initial pilot tests in military aviation, where we verified the reliability and validity of the basic subjective scales (for example, by correlations with physiological data), this method was utilized for communication mapping in the HUBES (Human Behavior in Extended Spaceflight) experiment conducted between 1994 and 1995, and since then has been repeatedly used in experiments simulating long-term space flights. (2) Methods: In this article, we summarize the key findings obtained through sociomapping in eight space experiments with crews including women, conducted between 2015 and 2023, including five experiments at the Mars Desert Research Station (MDRS) and in three stages of the SIRIUS project (Scientific International Research in Unique Terrestrial Station). (3) Results: The median test-retest correlation for both the frequency and quality of communication was 0.64, ranging widely from −0.74 to 1. The quantity and quality of communication showed a moderately strong correlation (0.40). Control charts demonstrated diverse developmental trends in crew communication across the experiments. Sociomapping allowed for more detailed visualization of the structure and dynamics of communication throughout the missions, as well as the detection of subgrouping and isolation of individuals in the crews. (4) Conclusions: The experiments showed that scaled assessments of mutual communication in terms of both quantity (frequency) and quality are a reliable and valid tool that enables the capture of significant one-time fluctuations and/or long-term trends. The experiments highlighted the possibility of increased risk of significant fluctuations and gradual deterioration of communication in the second half of the mission, which, however, does not have to be the rule, especially in shorter isolations. Continuous monitoring of communication through simple rating scales allows for timely intervention and stabilization of communication.

Higher Education Quality Indicators: A Scale Development Study

The purpose of this research is to develop a Likert-type scale aimed at determining how quality indicators in higher education are perceived by faculty members. A pilot study of the research was conducted with the participation of 390 faculty members. As a result of the factor analysis applied to test the construct validity of the 67-item draft scale, a measurement tool consisting of 9 dimensions and 49 items was developed. The first dimension is named Education and Instruction, the second is Structure of the University, the third is Socio-Cultural Opportunities, the fourth is Internationalization, the fifth is Economic Opportunities, the sixth is Student Requirements, the seventh is Accreditation, the eighth is Preferability, and the ninth is Technological Competence. The overall Cronbach's Alpha reliability coefficient of the scale has been calculated as 0.96. Additionally, as a result of the independent groups t-test for the reliability of the scale, it has been determined that items and factors are distinctive between the lower and upper 27% groups; the item-total and item-remainder correlation values are significant. Correlation coefficients between factors and the test-retest correlation coefficient for the entire scale have been found significant. Based on the conducted analyses, the validity and reliability of the scale have been established. The scale has been named the Higher Education Quality Indicators: Faculty Member Scale (HEQIFMS).

When to conduct student evaluation of teaching surveys: before or after the final examination?

Student evaluation of teaching (SET) involves numerous conceptual and methodological problems. This paper focuses on a specific methodological dilemma: whether to conduct SET surveys before or after the final examination. This decision is a critical administrative and practical issue that can affect the level and quality of SET results. To address this problem, a systematic literature search was initially performed. However, it found only 17 studies and inconclusive results. In the empirical component, a replication survey (n = 5,077) was conducted. It posed seven course-related questions to the same students before and after their final examination. A slightly higher but statistically significant (p < 0.001) average score was obtained in the after-examination survey (a 0.06 difference on a 1–5 scale). This increase was partly attributed to a positive examination experience. The overall test–retest correlation (r = 0.61) indicated relatively low reliability, suggesting that the before-examination survey better reflected students’ attitudes. The data quality was also higher in the before-examination survey, although the before-examination survey could not properly assess the examination-related aspects of the course. From a methodological perspective, the most comprehensive insight seems to be derived from conducting SET surveys before the examination and following up with a brief after-examination survey.

RACE/ETHNICITY AND THE MEASUREMENT OF COGNITION IN NSHAP: RECOMMENDATIONS FOR ROBUSTNESS

Abstract In this study, we interrogate measurement of cognition by race, in order to move towards a less-biased and more-inclusive set of measures for capturing cognitive change and decline in older adulthood. We use data from Round 2 (N=3377) and Round 3 (N=4777) of the National Social Life Health and Aging Project (NSHAP), and examine the study’s version of the Montreal Cognitive Assessment (MoCA). We employ exploratory factor analyses to explore configural invariance by racial/ethnic group (Non-Hispanic White, Non-Hispanic Black, Hispanic, All else), and then log-likelihood tests of scalar and metric invariance. Using modification indexes we identify items that seem robust to bias by race. We test the predictive validity of the full (18-item) and short (7-item) scales using self-reported dementia diagnosis, Instrumental Activities of Daily Living (IADLs), proxy reports of dementia death, and National Death Index (NDI) reports of dementia death. We found that 7 measures, out of the 18 used in NSHAP’s MoCA, formed a scale that was more robust to racial bias. The shortened form predicted consequential outcomes equally well, compared to NSHAP’s full MoCA. The short form was also highly correlated with the full form, and displayed lower test-retest correlation between Round 2 and 3. Although sophisticated structural equation modeling techniques could be useful for assuaging measurement invariance by race in NSHAP, the shortened form provides a quick way for researchers to carry out robustness checks – to see if the disparities and associations they document are ‘real’ or the product of artifactual bias.

Evaluation of the validity and reliability of a self-assessment questionnaire for cosmetic outcomes after thyroidectomy: a cross-sectional validation study.

The Self-Assessment Questionnaire for Cosmetic Outcomes (SAQCO) was developed by us to evaluate the cosmetic outcome of patients after thyroidectomy. This study aimed to examine the reliability and validity of SAQCO. We analyzed the cosmetic outcomes of 368 patients who underwent thyroidectomy and completed the SAQCO 1 year after surgery. The one-dimensionality, reliability, and validity of SAQCO were assessed using factor analysis models, Cronbach's alpha, and test-retest statistics. The differences in cosmesis indices between patient characteristics and surgical parameters were analyzed through comparative and regression analyses. The unidimensional convergence of SAQCO was examined. A Cronbach's alpha of 0.91, strong item-total correlation values (from 0.77 to 0.89), and a test-retest correlation value of 0.86 indicated the internal consistency and reliability of the SAQCO. The cosmesis index was significantly highest in the transoral (92.3 points) and transaxillary groups (90.9 points), followed by the postauricular (84.8 points) and transcervical groups (76.4 points). This study examined the reliability and validity of the SAQCO and showed that it is a suitable questionnaire for assessing cosmetic satisfaction of patients after thyroidectomy. The transoral and transaxillary approaches yield significantly superior cosmetic results compared to the conventional transcervical and postauricular approaches.

The Therapy Progress Scale: Evaluating Psychometric Properties in an Outpatient Sample of Clients in Private Practice

Measurement-based care, an evidence-based practice endorsed by the American Psychological Association, is underpinned by routine assessment supporting a data-driven approach to clinical decision making. Nonetheless, there is a need for brief, nonproprietary measures assessing non-symptom-based outcomes. The present study examined the psychometric properties of the Therapy Progress Scale (TPS), a four-item measure assessing clients’ perceived treatment progress in multiple life functioning domains. The sample included 36,420 clients (66% female, 55.5% White, 31.5% Racial/Ethnic Minority) receiving outpatient psychotherapy from a practice-research group of private practitioners. The TPS demonstrated a one-factor solution (χ 2 (2) = 362.08, RMSEA = .076, CFI = .999, TLI = .996) with high reliability estimate (coefficient α = .87). Additionally, the factor structure was consistent across client gender and race/ethnicity. There were moderate negative correlations with symptom-based measures (i.e. PHQ-9 and GAD-7). Test-retest correlation was also strong. Implications for research and practice are provided.

Validity and reliability of the Japanese version of the Patient Satisfaction Questionnaire (PSQ-J) for evaluating oncologist consultations

To develop the Japanese version of the Patient Satisfaction Questionnaire (PSQ-J) and examine its validity and reliability. A cross-sectional, web-based survey was conducted among cancer patients in Japan. The PSQ-J was developed following the forward-backward translation method, using a numerical rating scale. Data on patient characteristics and psychometric scales, like the PSQ-J, willingness to recommend an oncologist to others, trust in the healthcare system, uncertainty, and the Physician Compassion Questionnaire were collected. Validity was examined using exploratory and confirmatory factor analyses and by calculating the correlations between the total PSQ-J score and the criterion variables. Reliability was confirmed by Cronbach's alpha and test-retest score correlations at a two-week interval. The first and second surveys were conducted on 309 and 107 patients, respectively. One-dimensionality and model fit were verified using factor analyses. The PSQ-J was significantly associated with other comparable scales. Cronbach's alpha was 0.962; the correlation between the PSQ-J test-retest scores was 0.835 (p < .001). The current study indicates that the PSQ-J can be valid and reliable for assessing satisfaction with oncologist consultation. The PSQ-J enables the effective assessment of patient satisfaction with oncologist consultations, leading to better practice reflecting the patient's viewpoint.

Development and validation of the systemic lupus erythematous scale amongst the system of quality of life instruments for chronic diseases QLICD-SLE (V2.0)

ObjectiveThe present study is aimed to develop and validate a quality of life scale for systemic lupus erythematosus (SLE) patients with Chinese cultural background, QLICD-SLE (V2.0).MethodsThe QLICD-SLE (V2.0) was developed using a systematic approach that involved focus groups, nominal discussions, and pilot testing. A total of 428 SLE patients participated in the scale's assessment. Validity was examined through qualitative analysis, item domain correlation, multidimensional scaling, and factor analysis. Reliability was assessed using Pearson's correlation and Cronbach's alpha coefficients. To evaluate responsiveness, paired T-tests were conducted to compare pre- and post-treatment measurements with the standardised response mean (SRM) being calculated.ResultsCorrelation and factor analyses demonstrated strong construct validity. When using SF-36 as criteria, the correlation between various domains of QLICD-SLE and SF-36 ranged from 0.55 to 0.70. Test–retest correlation coefficients exceeded 0.71, and Cronbach’s alpha coefficients for both measurements in each domain were greater than or equal to 0.75. T-test results showed that both the overall score and most facet scores within each domain showed statistically significant changes after treatment (P < 0.05), indicating reasonable responsiveness.ConclusionThe QLICD-SLE (V2.0) appears to be a valid and reliable instrument for assessing the quality of life in patients with SLE.

The Danish child and parent Gait Outcomes Assessment List questionnaires were reliable and valid for cerebral palsy.

We investigated the reliability and validity of the Danish child and parent versions of the Gait Outcomes Assessment List (GOAL) questionnaires for ambulatory children with cerebral palsy (CP). Translation and cultural adaptations were performed and content validity evaluated. Participants were enrolled between 2016 and 2018 from Aarhus University Hospital, Denmark. Children and parents completed the GOAL questionnaires twice for test-retest reliability. Discriminative validity was evaluated by comparing the child and parent GOAL scores between children with Gross Motor Function Classification System (GMFCS) levels I and II. The concurrent validity of the GOAL questionnaires were investigated by comparing them with Challenge-20, which assesses motor skills in children with CP. We studied 59 children (57% boys) with CP and GMFCS I-II at a mean age of 10.6 years. Test-retest intra-class correlations were excellent for the children (0.91, 95% confidence interval (CI) 0.83-0.96) and good for the parents (0.83, 95% CI 0.67-0.91). GOAL scores decreased with increasing GMFCS (p < 0.05). Both versions correlated well. The mean children's scores were significantly (6.2/100) higher than the parents' (p < 0.001). The GOAL scores correlated positively with Challenge-20. The Danish GOAL child and parent questionnaires demonstrated good reliability and content and discriminative and concurrent validity.

Cross-cultural adaptation, validation and psychometric evaluation of the International Hip Outcome Tool 12 (iHOT12) to Hebrew

BackgroundThe “International Hip Outcome Tool 12” (iHOT12) is a self-administered patient-reported outcome tool for measuring health-related quality of life and physical functioning in young and active patients with hip pathology. Since the iHOT12 has become widely used, we sought to translate and validate it for Hebrew-speaking populations. The aims of this study were: (1) To translate and culturally adapt the iHOT12 into Hebrew using established guidelines. (2) To test the new Hebrew version for validity, and (3) reliability.MethodsThe iHOT12 was translated and culturally adapted from English to Hebrew (iHOT12-H) according to the COSAMIN guidelines. For validity, the iHOT12-H and Western Ontario and McMaster universities osteoarthritis index (WOMAC) were completed by 200 patients with hip pathology. Exploratory factor analysis was used to assess structural validity. Subsequently, 51 patients repeated the iHOT12-H within a 2-week interval. Intraclass Correlation Coefficient (ICC), Cronbach alpha, and Standard Error of Measurement (SEM) were calculated to assess reliability.ResultsConstruct validity: iHOT12-H correlated strongly to the WOMAC scores (r = -0.82, P < 0.001, Spearman). Factor analysis revealed a two-factor structure. Cronbach’s alpha was 0.953 confirming internal consistency to be highly satisfactory. Test–retest correlation of the iHOT12-H was excellent with an ICC = 0.956 (95% CI 0.924–0.974). There was no floor or ceiling effect.ConclusionThe iHOT12 Hebrew version has excellent reliability, good construct validity and can be used as a measurement tool for physical functioning and quality of life in young, physically active patients with hip pathology. This study will serve Israeli researchers in evaluating treatment effectiveness for these patients. Moreover, it will also enable multinational cooperation in the study of hip pathology.

Psychometric testing of the 10-item perceived stress scale for Chinese nurses

BackgroundNurses bear a lot of stressors at work. The 10-item Perceived Stress Scale (PSS-10) is a widely used self-reported scale for measuring the global perception of stress. However, there is a lack of use of the PSS-10 in Chinese nurses. This study aimed to test the psychometric properties of the PSS-10 among Chinese nurses.MethodsA total of 708 Chinese nurses completed the PSS-10, the Big Five Inventory (BFI), and the Depression Anxiety and Stress Scale (DASS). Confirmatory factor analysis (CFA) tested the factor structure of the PSS-10. Cronbach’s α and test-retest correlation examined the scale reliability. Pearson correlation and hierarchical regression analyses tested the convergent, discriminant and criterion validity of the PSS-10.ResultsCFA revealed that a two-factor model fits the structure of the PSS-10 in Chinese nurses (χ2/df = 6.25, p < 0.001; comparative fit index [CFI] = 0.94, non-normal fit index [NNFI] = 0.92, Tucker-Lewis index [TLI] = 0.91, root mean square error of approximation [RMSEA] = 0.08, standardized root mean square residual [SRMR] = 0.05). The scale demonstrated adequate internal consistency (α = 0.86) and test-retest reliability (r = 0.66, p < 0.001), satisfactory convergent and discriminant validity with relations to Big Five personalities, as well as good criterion validity such that the PSS-10 score could explain incremental variance in predicting anxiety, depression and stress.ConclusionsOur findings suggest that PSS-10 is a reliable and valid measure of perceived stress among Chinese nurses and can be used in future research and practice on stress management and coping in Chinese nurses.

The Reliability and Validity of Persian Version of Sports Coaches' Nutrition Questionnaire

Background: Sports nutrition knowledge is one of the essential needs of coaches. However, there is no standardized questionnaire in Persian to assess coaches' nutritional knowledge and information. Therefore, the purpose of this study is to evaluate the validity and reliability of Persian version of the Coach Sports Nutrition Questionnaire (CSNQ). Methods: CSNQ was translated-re-translated according to the WHO standard method, following Iranian culture and eating habits. The reliability of the questionnaire was assessed by test-retest method, correlation coefficient and internal reliability by Cronbach's alpha, and differential validity by independent t-test. 123 Iranian coaches completed the questionnaire. Results: The total internal reliability of the questionnaire assessed by Cronbach's alpha was 0.73. The intragroup correlation of the questionnaire, assessed by the test-retest method, was 0.71. Moreover, the comparison of the coaches with different levels of education was found to be significant (P &lt; 0.001). Conclusion: The Persian version of the questionnaire regarding the coaches' nutrition sports knowledge has acceptable reliability and validity. It can help other studies and evaluate sports nutrition knowledge in Persian coaches.

Integrating standard and network psychometrics to assess the quality of prison life in Serbia

In the present research, we analysed the properties of the Measuring the Quality of Prison Life (MQPL) survey in Serbia; it assesses five dimensions of prisoners’ well-being (harmony, professionalism, security, conditions and family contact, and well-being and development) composed of 21 narrow scales. The participants were 650 prisoners serving sentences in five prisons. Reliabilities (measured by both Cronbach's alphas and test–retest correlations) were high for most narrow scales and excellent for global scales. Confirmatory factor analysis showed a satisfactory fit of the model although the MQPL dimensions showed high intercorrelations (indicating elevated informational redundancy). The validity of the scales was established by detecting positive correlations with the WHOQOL-BREF quality of life scale and by capturing the differences between the five prisons in which the data were collected. We used network analysis to detect the most central nodes in MQPL: analysis on the dimension level revealed that harmony, professionalism, and well-being and development had high centrality. Estimating the network on the level of narrow scales demonstrated that prisoners’ well-being, organisation and consistency in prison activities, and help and assistance from prison staff were central aspects of their quality of life. Therefore, the present findings show that MQPL scales have high reliability and validity, the model fits the empirical data, and the central aspects of prisoners’ quality of life are identified; at the same time, we also analysed the limitations of MQPL. In general, the results suggest that MQPL is a valuable tool for assessing the quality of life and social climate in prisons.