Problem resolution scale: A single-item instrument for easily assessing clinical improvement.

This study describes the development and tests the validity of the Problem Resolution Scale (PRS)-a single-item measure developed by researchers at Systemic Practice Research Network (SYPRENE) for assessing the degree to which the focal problem of therapy is perceived as resolved. Data were collected at termination from 747 clients seen across 18 therapists. Results suggested good construct validity, supported by a strong correlation between client and therapist perceptions as assessed by the PRS (r = 0.71, p < 0.001). Good criterion validity was also supported by strong correlations between client-reported psychological well-being and functioning at termination and both client-reported (r = -0.63; p < 0.001) and therapist-reported (r = -0.66; p < 0.001) problem resolution scores. Linear mixed model regression and stratified correlation analysis controlling for the therapist and presenting problem effects confirmed criterion validity. Results provide initial evidence for the validity and utility of the PRS.

Incorporating patient-reported outcome data into a predictive calculator for allogeneic hematopoietic cell transplantation recipients.

BACKGROUND: The Center for International Blood and Marrow Transplant Research (CIBMTR) provides a 1-year overall survival calculator to estimate outcomes for individual patients before they undergo allogeneic hematopoietic cell transplantation (HCT) to inform risk. The calculator considers pre-HCT clinical and demographic characteristics, but not patient-reported outcomes (PROs). Because pre-HCT PRO scores have been associated with post-HCT outcomes, the authors hypothesized that adding PRO scores to the calculator would enhance its predictive power. METHODS: Clinical data were obtained from the CIBMTR and the Blood and Marrow Transplant Clinical Trials Network. The PRO measures used were the 36-Item Short Form Survey (SF-36) and the Functional Assessment of Cancer Therapy-Bone Marrow Transplantation. One thousand thirty-three adult patients were included. RESULTS: When adjusted for clinical characteristics, the SF-36 physical component score was significantly predictive of 1-year survival (hazard ratio [HR], 0.88; 95% confidence interval [CI], 0.81-0.95; p = .0015), whereas the mental component score was not (HR, 1.02; 95% CI, 0.95-1.10; p = 0.6396). The baseline single general health question on the SF-36 was also significantly associated with mortality (HR, 1.91 for those reporting fair/poor health vs. good, very good, or excellent health; 95% CI, 1.33-2.76; p = .0005). The addition of PRO scores to the calculator did not result in a significant change in the model's predictive ability. Self-reported pre-HCT scores were strongly predictive of self-reported health status (odds ratio, 3.35; 95% CI, 1.66-6.75; p = .0007) and quality of life (odds ratio, 3.24; 95% CI, 1.93-5.41; p < .0001) after HCT. CONCLUSIONS: The authors confirmed the significant, independent association of pre-HCT PRO scores with overall survival, although adding PRO scores to the survival calculator did not improve its performance. They also demonstrated that a single general health question was as accurate as the full measure for predicting survival, an important finding that may reduce respondent burden and promote its inclusion in routine clinical practice. Validation of these findings should be performed.

Development of the Hogan Personality Content Single-Items Inventory.

The Hogan Personality Inventory (HPI) and Hogan Developmental Survey (HDS) are among the most widely used and extensively well-validated personality inventories for organizational applications; however, they are rarely used in basic research. We describe the Hogan Personality Content Single-Items (HPCS) inventory, an inventory designed to measure the 74 content subscales of the HPI and HDS via a single-item each. We provide evidence of the reliability and validity of the HPCS, including item-level retest reliability estimates, both self-other agreement and other-other (or observer) agreement, convergent correlations with the corresponding scales from the full HPI/HDS instruments, and analyze how similarly the HPCS and full HPI/HDS instruments relate to other variables. We discuss situations where administering the HPCS may have certain advantages and disadvantages relative to the full HPI and HDS. We also discuss how the current findings contribute to an emerging picture of best practices for the development and use of inventories consisting of single-item scales.

Comparing Single-Item and Multi-Item Trust Scales: Insights for Assessing Trust in Project Leaders.

The purpose of this research is to provide researchers and leaders with a reliable and up-to-date comparison between a single-item and a multi-item trust scale, enabling effective assessment of team members' trust in their leaders. The aim of the study is to investigate whether a single-question scale is as reliable as a multi-item questionnaire in measuring trust. An additional goal is to provide researchers with insights and conditions for effectively using single or multiple measures to assess trust in leaders, considering factors like reliability and effectiveness. After conducting a comprehensive literature review, data were collected from 101 project members in Brazil using a survey methodology. The respondents were asked to provide feedback regarding their leaders, specifically project managers, and factor analysis was then employed to test the single-item and multi-item measures of trust. The advantages and disadvantages of each approach are discussed. The findings of our study demonstrate that both single-item and multi-item scales of trust should be utilized to gain a more comprehensive understanding of the trust construct. Single-item questionnaires can reduce survey length, improve respondent friendliness, and increase participant willingness. On the other hand, multi-item questionnaires enable researchers to analyze latent variables that contribute to an overall variable, but they cannot isolate data for each of those constructs. The results show that both measures are reliable, providing researchers and professionals with insights into the benefits and drawbacks associated with each method. Consequently, this research equips researchers and project professionals with valuable information for selecting the appropriate measurement tool.

Validating a Korean Version of the Single-Item Burnout Measure for Evaluating Burnout Among Doctors.

OBJECTIVE: It is essential to measure the effect of burnout on doctors because burnout can affect doctors' mental health as well as the functioning of medical practice. This study aims to validate a Korean version of the single-item burnout measure (SIBM), which was developed to quickly measure the level of burnout among doctors. METHODS: Through an online survey, a self-report questionnaire was administered to 324 public health doctors in Korea. The Korean version of the SIBM was validated against the Maslach Burnout Inventory-General Survey (MBI-GS), the Patient Health Questionnaire-9 (PHQ-9), the Generalized Anxiety Disorder-7 (GAD-7) screening tool, the Perceived Stress Scale (PSS), and the Vaccination Attitudes Examination (VAX) scale. Pearson correlation coefficients and analysis of variance (ANOVA) were used to determine the association between the SIBM and other scales. ANOVA was additionally used to determine the associations between the subscales of the MBI-GS and those of the SIBM. RESULTS: The correlation coefficient between the SIBM and the MBI-GS, PHQ-9, GAD-7, and PSS was positive (p<0.01), and the correlation coefficient between the SIBM and the VAX scale was not significant. Therefore, convergent and discriminant validity was verified. Exhaustion and cynicism, which were correlated with the SIBM, with r2=0.43 (p<0.01) and 0.48 (p<0.01), yielded R2 scores of 0.27 (p<0.01) and 0.20 (p<0.01) in ANOVA. CONCLUSION: The Korean version of the SIBM is an appropriate screening tool for burnout. It can be evaluated in a short time, thereby enhancing continuous follow-up observations and response rates to burnout.

Validity and reliability of the arabic version of the self-report single-item self-esteem scale (A-SISE).

BACKGROUND: Meta-analytic findings documented a substantial impact of self-esteem on a broad range of psychological and behavioral indicators, thus highlighting its high clinical relevance. Proving a simple and cost-effective measure of global self-esteem to the Arabic-speaking community, who mostly live in low- and middle-income countries, and where research may be challenging, would be highly valuable. In this context, we sought to investigate the psychometric characteristics of an Arabic translation of the Single-Item Self-Esteem Scale (A-SISE) in terms of factor structure, reliability, and construct validity. METHODS: A total of 451 participants were enrolled between October and December 2022. An anonymous self-administered Google Forms link was shared on WhatsApp. To examine the factor structure of the A-SISE, we used the FACTOR software. We conducted an exploratory factor analysis (EFA), using a principal component analysis on the Rosenberg Self-Esteem Scale (RSES) items first, then after adding the A-SISE. RESULTS: The results of the EFA of the RSES revealed two factors (F1 = negatively-worded items; F2 = positively-worded items), which explained 60.63% of the common variance. When adding the A-SISE, the two-factor solution obtained explained 58.74% of the variance, with the A-SISE loading on the second factor. Both RSES and A-SISE correlated significantly and positively with each other, as well as with extroversion, agreeableness, conscientiousness, open mindedness and satisfaction with life. Moreover, they correlated significantly and negatively with negative emotionality and depression. CONCLUSION: These results suggest that the A-SISE is a simple-to-use, cost-effective, valid and reliable measure of self-esteem. We thus recommend its use in future research among Arabic-speaking people in Arab clinical and research settings, particularly when researchers are limited by time or resources constraints.

Psychometrics of patient-reported bother from side effects of treatment single-items in industry-sponsored oncology trials.

BACKGROUND: Improvements in cancer treatment have increased the number of cancer survivors, but also increased the long-term and late effects from cancer therapy. Patient reported "side effect bother" could be used to measure the burden of treatment, and the risk for negative outcomes such as dose reduction, treatment delay or discontinuation. The current study addresses the psychometric properties of a single item, determines what represents a "meaningful change", and evaluates the correlation to safety endpoints and functioning. METHODS: Results from 5911 patients enrolled in 8 clinical trials representing 5 disease types in oncology and hematology who completed either the Functional Assessment of Cancer Therapy (FACT) GP5 item or a modified bother item (MBI) were assessed. RESULTS: Patients ranged in age from 18 to 93 years, with all cancer stages represented and approximately equal numbers of males and females. Test-retest reliability was acceptable, as were convergent and known groups validity. The GP5 and MBI effectively demonstrated sensitivity to change over time and established meaningful thresholds. CONCLUSIONS: The results indicate that these single-items are psychometrically sound, capable of distinguishing known groups, responsive to change and can identify meaningful change over time in terms of treatment-related symptoms. It extends the findings of recent scientific groups by providing analyses not included in prior studies, and further supports the FDA's recommendation to include a single item question in clinical trials.

Test-retest reliability of single-item assessments of immune fitness, mood, and quality of life.

The use of single-item assessments is increasingly important and popular, as these enable quick real-time assessments in clinical practice or research. In this study we investigated the test-retest reliability of single-item assessments of mood ("stress", "anxiety", "depression", "fatigue", "loneliness", "being active", "optimism", and "happiness"), quality of life, and immune fitness in N = 108 participants. The analysis revealed high test-retest correlations between the single-item assessments (r = 0.67 to 0.90), moderate to excellent intraclass correlations (r = 0.672 to 0.889), and the Bland-Altman analysis revealed agreement between all test-retest assessments, except for depression. Taken together, it can be concluded that the single-item assessments of mood, quality and immune fitness have a good test-retest reliability. This strengthens the rationale for using these single item assessments.

Evaluation of the validity and screening performance of a revised single-item fear of cancer recurrence screening measure (FCR-1r).

OBJECTIVE: Fear of cancer recurrence (FCR) is highly prevalent among cancer survivors, but irregularly identified in practice. Single-item FCR measures suitable for integration into broader psychosocial screening are needed. This study evaluated the validity of a revised version of the original FCR-1 (FCR-1r) and screening performance alongside the Edmonton Symptom Assessment System - Revised (ESAS-r) anxiety item. METHODS: The FCR-1r was adapted from the FCR-1 and modelled on the ESAS-r. Associations between FCR-1r and FCR Inventory-Short Form (FCRI-SF) scores determined concurrent validity. Relationships of FCR-1r scores with variables related (e.g., anxiety, intrusive thoughts) and unrelated (e.g., employment/marital status) to FCR determined convergent and divergent validity respectively. A Receiver-Operating Characteristic analysis examined screening performance and cut-offs for the FCR-1r and ESAS-r anxiety item. RESULTS: 107 participants were recruited in two studies (Study 1, July-October 2021, n = 54; Study 2: November 2021-May 2022, n = 53). The FCR-1r demonstrated concurrent validity against the FCRI-SF (r = 0.83, p < 0.0001) and convergent validity versus the Generalised Anxiety Disorder-7 (r = 0.63, p < 0.0001) and Impact of Event Scale-Revised Intrusion subscale (r = 0.55, p < 0.0001). It did not correlate with unrelated variables (e.g., employment/marital status), indicating divergent validity. An FCR-1r cut-off ≥5/10 had 95% sensitivity and 77% specificity for detecting clinical FCR (area under the curve (AUC) = 0.91, 95% CI 0.85-0.97, p < 0.0001); ESAS-r anxiety cut-off ≥4 had 91% sensitivity and 82% specificity (AUC = 0.87, 95% CI 0.77-0.98, p < 0.0001). CONCLUSIONS: The FCR-1r is a valid and accurate tool for FCR screening. Further evaluation of the screening performance of the FCR-1r versus the ESAS-r anxiety item in routine care is needed.

Overall childbirth experience: what does it mean? A comparison between an overall childbirth experience rating and the Childbirth Experience Questionnaire 2.

BACKGROUND: In clinical settings and research studies, childbirth experience is often measured using a single-item question about overall experience. Little is known about what women include in this rating, which complicates the design of adequate follow-up, as well as the interpretation of research findings based on ratings of overall childbirth experience. The aim of this study was to examine which known dimensions of childbirth experience women include in the rating on a single-item measure. METHODS: Ratings of overall childbirth experience on a 10-point numeric rating scale (NRS) from 2953 women with spontaneous or induced onset of labour at two Swedish hospitals were evaluated against the validated Childbirth Experience Questionnaire 2 (CEQ2), completed on one of the first days postpartum. The CEQ2 measures four childbirth experience domains: own capacity, perceived safety, professional support and participation. Internal consistency for CEQ2 was evaluated by calculating Cronbach's alpha. NRS ratings were explored in relation to CEQ2 using empirical cumulative distribution function graphs, where childbirth experience was defined as negative (NRS ratings 1-4), mixed (NRS ratings 5-6) or positive (NRS ratings 7-10). A multiple linear regression analysis, presented as beta coefficients (B) and 95% confidence intervals (CI), was also performed to explore the relationship between the four domains of the CEQ2 and overall childbirth experience. RESULTS: The prevalence of negative childbirth experience was 6.3%. All CEQ2-subscales reached high or acceptable reliability (Cronbach's alpha = 0.78; 0.81; 0.69 and 0.66, respectively). Regardless of overall childbirth experience, the majority of respondents scored high on the CEQ2 subscale representing professional support. Overall childbirth experience was mainly explained by perceived safety (B = 1.60, CI 1.48-1.73), followed by own capacity (B = 0.65, CI 0.53-0.77) and participation (B = 0.43, CI 0.29-0.56). CONCLUSIONS: In conclusion, overall childbirth experience rated by a single-item measurement appears to mainly capture experiences of perceived safety, and to a lesser extent own capacity and participation, but appears not to reflect professional support. CEQ2 shows good psychometric properties for use shortly after childbirth, and among women with induced onset of labour, which increases the usability of the instrument.

Thoughts About Measuring Concepts: Using Single-Item Indicators and Multiple-Item Indicators.

This essay presents a discussion about using a single item to measure a concept versus using multiple items. The discussion is data-based, using the results from a cross-sectional pilot study of correlates of functional status of women and their male partners who were experiencing high-risk childbearing.

Evidence for the Validation of a Single Item Recovery Question (SIRQ) in Children With Mild and Complicated Mild Traumatic Brain Injury.

BACKGROUND: Recovery from a brain injury occurs in varying degrees. The objective of this study was to investigate the concurrent validity of a parent-reported 10-point scale for degree of recovery, Single Item Recovery Question (SIRQ), in children with mild traumatic brain injury (mTBI) or complicated mTBI (C-mTBI) compared with validated assessments of symptom burden (Post-Concussion Symptom Inventory Parent form-PCSI-P) and quality of life (Pediatric Quality of Life Inventory [PedsQL]). METHODS: A survey was sent to parents of children aged five to 18 years who presented to pediatric level I trauma center with mTBI or C-mTBI. Data included parent-reported postinjury recovery and functioning of children. Pearson correlation coefficients (r) were calculated to measure the associations of the SIRQ with the PCSI-P and the PedsQL. Hierarchical linear regression models were used to examine if covariates would increase the predictive value of the SIRQ to the PCSI-P and the PedsQL total scores. RESULTS: Of 285 responses (175 mTBI and 110 C-mTBI) analyzed, Pearson correlation coefficients for the SIRQ to the PCSI-P (r = -0.65, P < 0.001) and PedsQL total and subscale scores were all significant (P < 0.001) with mostly large-sized effects (r ≥ 0.500), regardless of mTBI classification. Covariates, including mTBI classification, age, gender, and years since injury, resulted in minimum changes in the predictive value of the SIRQ to the PCSI-P and the PedsQL total scores. CONCLUSIONS: The findings demonstrate preliminary evidence for the concurrent validity of the SIRQ in pediatric mTBI and C-mTBI.

Would the Real Loneliness Please Stand Up? The Validity of Loneliness Scores and the Reliability of Single-Item Scores.

Several measures that assess loneliness have been developed for adults. Across three studies, we investigated psychometric features of scores of different versions of the Rasch-Type Loneliness Scale, the University of California Los Angeles Loneliness Scale, and three single-item measures. In Study 1 (N = 697 self-ratings, N = 282 informant-ratings of 160 targets) and Study 2 (N = 1,216 individuals from 608 couples), we investigated convergent validity, self-informant agreement, and nomological nets of the item scores using correlates related to demographic aspects, personality, satisfaction, and network characteristics. In Study 3 (N = 411), we estimated a reliability of rxx>.70 for scores of three single-item measures of loneliness. Overall, scores of all measures and their nomological nets were highly correlated within and across studies, indicating that the scores of the included measures are all reliable and valid. Recommendations for choosing a loneliness measure are discussed.

Quantifying and addressing the impact of measurement error in network models.

Network psychometric models are often estimated using a single indicator for each node in the network, thus failing to consider potential measurement error. In this study, we investigate the impact of measurement error on cross-sectional network models. First, we conduct a simulation study to evaluate the performance of models based on single indicators as well as models that utilize information from multiple indicators per node, including average scores, factor scores, and latent variables. Our results demonstrate that measurement error impairs the reliability and performance of network models, especially when using single indicators. The reliability and performance of network models improves substantially with increasing sample size and when using methods that combine information from multiple indicators per node. Second, we use empirical data from the STAR*D trial (n = 3,731) to further evaluate the impact of measurement error. In the STAR*D trial, depression symptoms were assessed via three questionnaires, providing multiple indicators per symptom. Consistent with our simulation results, we find that when using sub-samples of this dataset, the discrepancy between the three single-indicator networks (one network per questionnaire) diminishes with increasing sample size. Together, our simulated and empirical findings provide evidence that measurement error can hinder network estimation when working with smaller samples and offers guidance on methods to mitigate measurement error.

Diagnostic accuracy of the Single-item Measure of Burnout (Japanese version) for identifying medical resident burnout.

Background: Burnout is a psychological syndrome consisting of emotional exhaustion, cynicism, and decreased professional efficacy. The Maslach Burnout Inventory (MBI) is widely used as the standard measure. However, the MBI is lengthy and not free to use, which makes it a less than ideal tool for regularly assessing burnout. The single question burnout measure (SMB) is a novel and simple measure of burnout, which is associated well with emotional exhaustion and has sufficient diagnostic performance for burnout. This study aimed to evaluate the concurrent and convergent validity of the Japanese version of the single-item measure of burnout (SMB-J) compared with the MBI. Methods: Ninety-four medical residents volunteered to complete the MBI-General Survey (MBI-GS) and the SMB-J. We assessed the concurrent (sensitivity and specificity) and convergent validity of the SMB-J compared with the MBI-GS. Results: The sensitivity for identifying burnout using the SMB-J was 53.8%, and the specificity was 88.2%. The area under the receiver operating characteristic curve (AUC) was 0.71. MBI-GS scores on the subscales of Emotional Exhaustion (r = 0.509, p < 0.0001) and Cynicism (r = 0.57, p < 0.0001) strongly correlated with the SMB-J scores. Conclusions: We concluded that for identifying burnout among Japanese medical residents, the psychometric properties of the SMB-J are comparable to those of the original version of the SMB. Although the SMB-J has low sensitivity to detect burnout, it is more convenient to use than the MBI.

Single- vs. Multi-Item Assessment of Suicidal Ideation Among Adolescents.

Several barriers exist to routine assessment of suicidal ideation (SI) in adolescents across settings, including insufficient time, tools, and training. Such barriers often result in the use of brief or even single-item assessments of SI, which may result in misclassification. The present study sought to compare single- and multi-item assessment of SI in adolescents, and to examine factors associated with different response profiles. Adolescents (n =206) were recruited from the community and completed a lab visit including a single and multi-item assessment for SI. Results suggest that two thirds of adolescents with passive SI go undetected when relying solely on a single-item screener, yet they present a similar clinical profile to those with passive SI who endorse the screener question. The present study provides support for the notion that multi-item assessment paints a more accurate, nuanced picture of SI among adolescents and may be an important component of routine screening.

A general pattern of health erosion in the United States? An examination of self-reported health status from 1997 - 2018.

Purpose: Recent research has found a general pattern of health erosion in self-assessed pain and allostatic load among adults in the United States (US). It remains to be determined if self-reported health status, hereafter SRH, also follows this pattern. The aim of this study was to examine whether a general pattern of health erosion is found in SRH among adults in the United States (US). Methods: Data from the National Health Interview Survey 1997-2018 were used to study sex, educational attainment, and racial/ethnic patterns in SRH by age, period and cohort among adults in the US. The analytic sample consisted of respondents aged 18 years or older at the moment of interview with valid information in the age, sex, education, race/ethnicity and health status question (n = 669,501). Estimates for the percent population reporting poor/fair health were produced by age, period and cohort to study trends in health status by sex, educational attainment and race/ethnicity. All estimates were weighted to account for complex survey design. Results: No discernible pattern of health erosion, or improvement, is observed in the age, period or cohort analyses of the percent of the population reporting poor/fair SRH by sex, educational attainment or race/ethnicity. Conclusions: The analysis indicates that self-reported health does not follows the general pattern of health erosion found in self-assessed pain and allostatic load in the US. The percent of the population reporting poor/fair health status has remained relatively stable between 1997 and 2018. Further research is required to determine whether self-reported health is an appropriate metric to track population health in the US.

Single-item chronotype is associated with dim light melatonin onset in lymphoma survivors with fatigue.

Chronotype is frequently assessed in human observational studies using various morningness-eveningness questionnaires. An alternative single-item chronotype question has been proposed for its reduced administration time and its accessibility to all types of populations. We investigated whether this single-item chronotype is associated with dim light melatonin onset, the "gold standard" for estimating the endogenous circadian phase. We used data from a randomised trial in 166 (non-)Hodgkin lymphoma survivors with cancer-related fatigue. All participants completed a questionnaire, including a single-item chronotype question. A subsample of 47 participants also provided saliva samples before sleep onset for melatonin measurement. Using multiple linear regression, we examined whether chronotype based on a single question was associated with dim light melatonin onset. The subsample of 47 participants had a mean age of 44.6 years. The mean (SD) dim light melatonin onset was at 8:42 (1:19) p.m. and the most common chronotype was more evening than morning person (29.2%). A gradual increase in dim light melatonin onset with later chronotype (i.e. evening preference) was observed, with a mean ranging from 7:45 p.m. in definite morning persons to 9:16 p.m. in definite evening persons. Our study shows that single-item chronotype is associated with dim light melatonin onset as a marker of the endogenous circadian phase of fatigued lymphoma survivors. This type of chronotype assessment can therefore be a useful alternative for more extensive morningness-eveningness questionnaires.

Validity and reliability of global ratings of satisfaction with epilepsy surgery.

OBJECTIVE: We aimed to assess the reliability and validity of single-item global ratings (GR) of satisfaction with epilepsy surgery. METHODS: We recruited 240 patients from four centers in Canada and Sweden who underwent epilepsy surgery ≥1 year earlier. Participants completed a validated questionnaire on satisfaction with epilepsy surgery (the ESSQ-19), plus a single-item GR of satisfaction with epilepsy surgery twice, 4-6 weeks apart. They also completed validated questionnaires on quality of life, depression, health state utilities, epilepsy severity and disability, medical treatment satisfaction and social desirability. Test-retest reliability of the GR was assessed with the intra-class correlation coefficient (ICC). Construct and criterion validity were examined with polyserial correlations between the GR measure of satisfaction and validated questionnaires and with the ESSQ-19 summary score. Non-parametric rank tests evaluated levels of satisfaction, and ROC analysis assessed the ability of GRs to distinguish among clinically different patient groups. RESULTS: Median age and time since surgery were 42 years (IQR 32-54) and 5 years (IQR 2-8), respectively. The GR demonstrated good to excellent test-retest reliability (ICC = 0.76; 95% CI 0.67-0.84) and criterion validity (0.85; 95% CI 0.81-0.89), and moderate correlations in the expected direction with instruments assessing quality of life (0.59; 95% CI 0.51-0.63), health utilities (0.55; 95% CI 0.45-0.65), disability (-0.51; 95% CI -0.41, -0.61), depression (-0.48; 95% CI -0.38, -0.58), and epilepsy severity (-0.48; 95% CI -0.38, -0.58). As expected, correlations were lower for social desirability (0.40; 95% CI 0.28-0.52) and medical treatment satisfaction (0.33; 95% CI 0.21-0.45). The GR distinguished participants who were seizure-free (AUC 0.75; 95% CI 0.67-0.82), depressed (AUC 0.75; 95% CI 0.67-0.83), and self-rated as having more severe epilepsy (AUC 0.78; 95% CI 0.71-0.85) and being more disabled (AUC 0.82; 95% CI 0.74-0.90). SIGNIFICANCE: The GR of epilepsy surgery satisfaction showed good measurement properties, distinguished among clinically different patient groups, and appears well-suited for use in clinical practice and research.

'I have high self-compassion': A face-valid single-item self-compassion scale for resource-limited research contexts.

The original 26-item Self-Compassion Scale (SCS; Neff, 2003) and 12-item Short-Form Self-Compassion Scale (SF-SCS; Raes et al., 2011) are scales commonly used in cross-sectional and longitudinal research to assess the global self-compassion construct and its six facets. We introduce the Single-Item Self-Compassion Scale (SISC; 'I have high self-compassion') to measure the global self-compassion construct in time-, space- and resource-limited contexts (e.g., daily diaries, experience sampling and nationally representative surveys). Additionally, the SISC will expand knowledge about self-compassion by providing researchers whose primary interest is not self-compassion with a convenient, face-valid option to measure self-compassion. Across 10 samples (four cross-sectional, four longitudinal and two 7-day daily diary; N = 2,477), we demonstrated that the SISC has acceptable psychometric properties. Specifically, the SISC was temporally consistent, correlated adequately with the SCS and SF-SCS, exhibited nearly identical correlational patterns when compared with the SCS and SF-SCS with a wide range of criterion measures (e.g., self-esteem, personality, affective and social functioning, mental health and demographic variables) and saved 12 min over a 7-day diary. Results replicated among students, community samples and across the United States, Turkey and Malaysia. Thus, we provide the field with an alternative measure of the global self-compassion construct that complements the SCS and SF-SCS.