Scale Discriminant Validity Research Articles

Factor structure and psychometric properties of the Jordanian version of the depression anxiety stress scale (DASS-21).

Early diagnosis of health conditions such as depression, anxiety, and stress, which have been recognized as global health issues, is essential for providing psychological support to people who experience negative emotions. Therefore, it is important to identify a reliable method for diagnosing depression, anxiety, and stress. To this end, this study investigated the factor structure and evaluated the psychometric properties of the Depression Anxiety Stress Scale-21 (DASS-21) in Jordan. A university sample of 336 Jordanians completed the Arabic version of the DASS-21 and several psychopathology measures. Cross-sectional study and confirmatory factor analysis (CFA) were applied to achieve the study's aims. CFA favored the bifactor model compared to the other four models. In contrast, the Beck Anxiety Inventory (BAI) and the Beck Depression Inventory-II (BDI-II) strongly correlated with the DASS-21, indicating that the DASS-21 has adequate convergent and divergent validity. Subsequently, the scale's discriminant validity was tested using the heterotrait-monotrait (HTMT) correlation ratio, which was found to be relatively insufficient. While DASS-21 showed strong reliability, Cronbach's α and McDonald's omega values ranged between 0.83 and 0.93. The bifactor model best fits the Jordanian sample data. The DASS-21 has optimum psychometric properties; therefore, it can be used to assess the general distress experienced by the Jordanian community during research investigations and in non-clinical settings.

Examining the Psychometric Properties of the Revised Scale of Economic Abuse among Iranian Women.

Economic abuse, in the context of intimate relationships, is a pervasive form of violence that merits further empirical attention. We know from limited research that the rates of economic abuse appear to be high in Iran; however, there is a lack of culturally appropriate measures that can assess the extent to which women experience economic harm as a result of their partners' actions. The present study was conducted with the aims of (a) investigating the psychometric properties of the 14-item Revised Scale of Economic Abuse (SEA2) which was translated into Persian for this study and (b) examining the prevalence of economic abuse among a sample of 371 married housewives in Qazvin, Iran. Confirmatory factor analysis supports the two-factor structure of the SEA2, with the exception of one item. Composite reliability and Cronbach's alpha demonstrated good internal consistency. The average variance extracted method, along with correlations with other financial variables, demonstrated evidence of good convergent validity. Correlations with related, but distinct forms of abuse, support the scale's discriminant validity. Based on the collective findings, this measure can be used as a reliable and valid tool to study economic abuse among Iranian women which, within our sample, appears to be a common phenomenon. Implications for future research and practice are discussed.

Validation of a Spanish-language version of the ADHD Rating Scale IV in a Spanish sample

ObjectivesThe purpose of this study is to validate a Spanish-language version of the 18-item ADHD Rating Scale-IV (ADHD-RS-IV.es) in a Spanish sample. MethodsFrom a total sample of 652 children and adolescents aged 6 to 17 years (mean age was 11.14±3.27), we included 518 who met the DSM-IV-TR criteria for ADHD and 134 healthy controls. To evaluate the factorial structure, validity, and reliability of the scale, we performed a confirmatory factor analysis (CFA) using structural equation modelling on a polychoric correlation matrix and maximum likelihood estimation. The scale's discriminant validity and predictive value were estimated using ROC (receiver operating characteristics) curve analysis. ResultsBoth the full scale and the subscales of the Spanish-language version of the ADHD-RS-IV showed good internal consistency. Cronbach's alpha was 0.94 for the full scale and ≥ 0.90 for the subscales, and ordinal alpha was 0.95 and ≥ 0.90, respectively. CFA showed that a two-factor model (inattention and hyperactivity/impulsivity) provided the best fit for the data. ADHD-RS-IV.es offered good discriminant ability to distinguish between patients with ADHD and controls (AUC=0.97). ConclusionsThe two-factor structure of the Spanish-language version of the ADHD-RS-IV (ADHD-RS-IV.es) is consistent with those of the DSM-IV-TR and DSM-5 as well as with the model proposed by the author of the original scale. Furthermore, it has good discriminant ability. ADHD-RS-IV.es is therefore a valid and reliable tool for determining presence and severity of ADHD symptoms in the Spanish population.

Perceptions towards disability among social work students in Israel: Development and validation of a new scale.

Over the last decades, the disability movement has been advocating for a paradigmatic shift in how disability is perceived and managed: from a medical or individual perspective focusing on the person's body and mind to a social perspective emphasizing the context and barriers of disability. However, we still know little about the perceptions of helping professionals, particularly social workers who work closely with disabled people. Thus, the aim of the current study is to develop and validate a scale-Perceptions Toward Disability Scale (PTDS)-to measure how social workers view disability: as an individual or social category. This paper describes the three phases of the scale's construction. First, scale items were formulated and its content validity was examined. Next, a pilot of 30 social workers completed a questionnaire and an initial exploratory factor analysis was conducted. In the third and main phase, the final draft was completed in 2016 by 565 Israeli social work students to assess its psychometric properties. Both exploratory and confirmatory factorial validity and discriminant validity analyses were conducted. The results of a confirmatory factor analysis revealed two distinct factors: an individual perspective of disability comprised of eight items (α=0.77) and a social perspective of disability comprised of ten (α=0.66). Subsequent analyses supported the scale's discriminant validity as indicated by the lack of an association between the Attitude Toward Disabled Persons Scale (ATDP) and the social model subscale (r=.13, p=.19) and by the weak negative relation with the individual model subscale (r=-.25, p=.01). These findings show that the PTDS possesses promising construct validity and provide support for its utility. This easy-to-administer instrument offers several practical benefits and can serve as a framework for further empirical research regarding social work practice with disabled people.

Validación de la versión en español de la escala de evaluación del trastorno por déficit de atención e hiperactividad (ADHD-RS-IV.es) en una muestra española

ObjectivesThe purpose of this study is to validate a Spanish-language version of the 18-item ADHD Rating Scale-IV (ADHD-RS-IV.es) in a Spanish sample. MethodsFrom a total sample of 652 children and adolescents aged 6 to 17 years (mean age was 11.14±3.27), we included 518 who met the DSM-IV-TR criteria for ADHD and 134 healthy controls. To evaluate the factorial structure, validity, and reliability of the scale, we performed a confirmatory factor analysis (CFA) using structural equation modelling on a polychoric correlation matrix and maximum likelihood estimation. The scale's discriminant validity and predictive value were estimated using ROC (receiver operating characteristics) curve analysis. ResultsBoth the full scale and the subscales of the Spanish-language version of the ADHD-RS-IV showed good internal consistency. Cronbach's alpha was 0.94 for the full scale and ≥ 0.90 for the subscales, and ordinal alpha was 0.95 and ≥ 0.90, respectively. CFA showed that a two-factor model (inattention and hyperactivity/impulsivity) provided the best fit for the data. ADHD-RS-IV.es offered good discriminant ability to distinguish between patients with ADHD and controls (AUC=0.97). ConclusionsThe two-factor structure of the Spanish-language version of the ADHD-RS-IV (ADHD-RS-IV.es) is consistent with those of the DSM-IV-TR and DSM-5 as well as with the model proposed by the author of the original scale. Furthermore, it has good discriminant ability. ADHD-RS-IV.es is therefore a valid and reliable tool for determining presence and severity of ADHD symptoms in the Spanish population.

Effect of four monthly doses of a human monoclonal anti-FGF23 antibody (KRN23) on quality of life in X-linked hypophosphatemia

X-linked hypophosphatemia (XLH) is characterized by lower extremity deformities that lead to bone and/or joint pain that result from decreased renal tubular reabsorption leading to hypophosphatemia caused by elevated levels of fibroblast growth factor 23 (FGF23). ObjectiveValidate the use of SF-36v2 Health Survey (SF-36v2) and the Western Ontario and McMaster Osteoarthritis Index (WOMAC) to measure previously unstudied health-related quality of life (HRQoL) in XLH patients and determine the change in HRQoL before and after treatment with KRN23, a human monoclonal anti-FGF23 antibody. MethodsTwenty-eight adult outpatients with XLH received up to four doses of KRN23 administered subcutaneously every 28days. General HRQoL was measured with the SF-36v2 and condition-related HRQoL with the WOMAC at baseline and study endpoint as a secondary outcome of a Phase 1/2, open-label, multicenter, dose-escalation trial. ResultsTesting for scale discriminant validity and convergent-divergent validity supported the use of these scales in the assessment of HRQoL in XLH. Both instruments indicated impairment of physical function at baseline with all mean scores showing a trend to improved health at study endpoint compared to baseline. When corrected for multiple comparisons, the score for Role Limitations due to physical health on the SF-36v2 which measures the patient's perception of their own chronic functional impairments due to poor physical health remained significantly improved (P<0.05), increasing to the mean score of US adults. For the WOMAC, Physical Functioning and Stiffness scores were significantly improved (P<0.05). ConclusionKRN23 administration was associated with significantly improved patient perception of their Physical Functioning and Stiffness due to their disease. This study demonstrates that the SF-36v2 and WOMAC are valid tools for assessing HRQoL in XLH.

Examining Individual Differences in Interpersonal Influence: On the Psychometric Properties of the Generalized Opinion Leadership Scale (GOLS)

Opinion leadership describes an individual's tendency to informally influence others’ attitudes and overt behaviors. In contrast to contemporary views of opinion leadership as a highly domain-specific trait, this paper introduces a multi-faceted personality trait, generalized opinion leadership (GOL) that characterizes exceptionally influential individuals independent of a specific subject area. Two studies report on the psychometric properties of a scale to assess GOL. Study 1 is based on three independent samples (N = 1,575, N = 1,275, and N = 231) and demonstrates the factorial structure of the instrument and its measurement invariance across sex, age, and educational levels. Study 2 (N = 310) analyzes multitrait-multiinformant data to highlight the scale's discriminant validity with regard to innovativeness and trendsetting.

Daily Goals Scale: Psychometric properties of the Turkish version

Objective: This research aims to conduct validity and reliability efforts for adaptation of Daily Goals Scale into Turkish culture. Methods: The research was conducted in two stages. The first stage comprised of translation works, exploratory factor analysis, internal consistency and test-retest methods; the second stage comprised of confirmatory factor analysis and discriminant validity. A total of 297 university students took part in the first stage of the research, whereas 303 others in the second stage. Results: As a result of exploratory factor analysis, % 56 of total variance of the Daily Goals Scale is explained and the factor loadings differ between 0.63 and 0.83. At the end of the confirmatory factor analysis, we can say that it has an acceptable adaptation. (χ2=192.38, sd= 63, χ2/sd=3.05, RMSEA=0.08, RMR=0.02, SRMR=0.04, GFI=0.91, AGFI=0.87, CFI=0.98, NNFI=0.98). The research also suggests that parameter of internal consistency of the scale is found as 0.92 and test-retest reliability parameter proves 0.80. The correlation parameters as well as Life Satisfaction Scale (0.45), Depression Scale (-0.23), Anxiety Scale (-0.16), Hope Scale (-0.17) were examined under the scale's discriminant validity. Conclusions: We can say that the Turkish version of the Daily Goals Scale is valid and reliable

The Impact of Vision Impairment for Children (IVI_C): Validation of a Vision-Specific Pediatric Quality-of-Life Questionnaire Using Rasch Analysis

To validate the Impact of Vision Impairment for Children (the IVI_C), a new vision-specific pediatric instrument designed to assess the affect of impaired vision on quality of life (QoL) in children. The IVI_C was administered to vision-impaired and normally sighted students, 8 to 18 years of age. Reliability and validity were tested, and the IVI_C was subjected to Rasch analysis to assess the scale unidimensionality, measurement characteristics, response options, and targeting. The mean (SD) presenting bilateral distance visual acuity (VA) for the vision-impaired group (n = 122) was 1.10 (0.79) logMAR and 1.15 (0.80) logMAR for near VA. After the initial response categories were collapsed from five to three, content validity was further supported by good person and item fit parameters. The person separation index (PSI) was 0.85, which indicates that the IVI_C can assess QoL across children of several participation levels. The scale was shown to be unidimensional after principal components analysis (PCA) of the residuals (t-test; P = 0.48, P = 0.34). Significant differences in overall person measures between the vision-impaired and normally sighted groups substantiated the scale discriminant validity (ANOVA; F = 78.75; P < 0.0001). Guttman split-half correlations for temporal, mode (face-to-face and telephone), and interobserver administrations were 0.95, 0.90, and 0.86, respectively, supporting scale reliability. The modified IVI_C is a unidimensional, reliable, and valid scale for assessing QoL of children with vision impairment. It provides a valid means of assessing the outcomes of interventions and needs in children with vision impairment.

Measuring patient satisfaction in oncology units: interview-based psychometric validation of the ‘Comprehensive Assessment of Satisfaction with Care’ in Greece

The aim of this study is to validate the 'Comprehensive Assessment of Satisfaction with Care' (CASC) in Greece. A total of 84 cancer inpatients met the inclusion criteria. Of them, 32 (38%) refused to participate, leading to a 62% response rate. For the translation of the scale, we followed the European Social Survey procedures encompassing four stages. Interview-based administration was chosen in order to obtain more reliable results in terms of time of assessment, response rate and data omission. Multitrait scaling analyses along with construct, scale-discriminant validity and reliability tests were carried out to establish the Greek version of CASC. Scales on doctors' technical skills, care organization and general satisfaction were in support of the European structure. In general, Doctors' scales had the anticipated structures. Most variations were noticed in the Nurses' scales, leading to a revised item-scale formation, and may reflect different importance patients attribute to various aspects of health care in different countries. Greek version of CASC may be a practical, valid and reliable tool for assessing patient satisfaction in oncology settings. Cross-cultural validation of the existing tools is necessary to enable comparison between various countries and settings. Interview-based administration should be considered when validating patient satisfaction instruments.

Measuring Dimensions of Body Connection: Body Awareness and Bodily Dissociation

This study aimed to test the preliminary psychometric properties of the Scale of Body Connection (SBC), a 20-item self-report measure, designed to assess body awareness and bodily dissociation in mind-body intervention research. The SBC items were based on common expressions of awareness in body therapy. Content validity was established by a panel of experts. The validity and reliability of the scale was examined with an undergraduate sample. To assess the scale's discriminant validity, the respondents were asked to indicate exposure to specific traumas. Confirmatory factor analysis, used to examine the scale's construct validity, indicated acceptable goodness-of-fit indices, and revealed uncorrelated subscales, reflecting independent dimensions. Cronbach's alpha revealed equal internal consistency reliability for each subscale for both men and women. Body awareness scores did not differ between individuals with and without reported trauma exposure. Bodily dissociation scores differed between individuals with and without past experience with physical trauma, suggesting the applicability of this subscale for use with populations with trauma histories. The results provide preliminary evidence of the construct validity and internal consistency reliability of the SBC.

Improving the response choices on the veterans SF-36 health survey role functioning scales: results from the Veterans Health Study.

Role functioning and its limitations due to one's health is an important aspect of health-related quality of life (HRQoL). The Medical Outcomes Study (MOS) SF-36 includes 2 role functioning scales: role limitations due to physical health problems (RP) or emotional problems (RE). Although they capture important concepts of HRQoL, these 2 scales have some limitations in their measurement properties. Using dichotomized sets of response choices, the scales are limited in their distributional properties (eg, higher standard deviation than other SF-36 scales) and ability to discriminate between clinically relevant groups. In this study, we ascertain the improvements to these 2 scales using 5-point ordinal response choices for each of the scale items. Two thousand one hundred sixty-two patients from the Veterans Health Study (VHS), an observational study of health outcomes in patients receiving ambulatory care, completed a health status questionnaire and a medical history. The health questionnaire included (1) the MOS SF-36, in which the RP and RE items used dichotomized yes/no responses; and (2) a set of modified RP and RE items that used 5-response choices for each of the items, ranging from "no, none of the time" to "yes, all of the time." We compared the original and modified RP and RE scales using internal consistency reliability and factor analysis. We tested item convergent and discriminant validity using multitrait scaling, and scale discriminant validity using ordinary least squares regression. Results indicate that the modifications to the original RP and RE scales accomplish important gains in the distributional properties of the scales. The floor and ceiling effects of the 2 scales have been reduced and the reliability of the RP scale has increased (0.87-0.95). Factor analysis and multitrait scaling tests indicate that the modified items have the same interpretation as the original items. Tests of discriminant validity indicate that the modified RP and RE scales have greater explanatory power for measures of disease burden, depression, and disease severity. The modified SF-36 role scales are clearly superior to the original versions. The modifications have increased the explained variability, suggesting greater explanatory power and more information obtained by the role functioning measures. The modified RP and RE are capturing a wider spectrum of disease severity, in part due to the lowering of the floor and raising of the ceiling of the scales. Additional work needs to test these improvements in other populations and to expand the analysis to track the responsiveness of the modified scales to clinically and socially important changes over time.

Construction of a personal development competitive attitude scale.

Theory development and research in the area of psychologically healthy competition has been impeded by the lack of a psychometrically sound instrument. Four studies were conducted as part of a research program designed to remedy this deficiency by constructing an individual difference measure of general personal development competitive attitude with satisfactory psychometric properties. In Studies 1 and 2, a 15-item scale was derived primarily through item-total correlational analysis; it demonstrated satisfactory internal and test-retest reliabilities. Studies 3 and 4 were concerned with establishing the construct validity of the scale. Both Studies 3 and 4 showed the scale's discriminant validity through its lack of association with hypercompetitiveness. In addition, its construct validity was seen in its negative association with neurosis and its positive links with personal and social self-esteem and optimal psychological health. Also, as expected, personal development competitiveness was positively correlated with needs for affiliation, whereas hypercompetitiveness was unrelated to affiliation needs. Although hypercompetitive individuals were more aggressive, dominant, and exhibitionistic, this was not the case for personal development competitors.

Development and Validation of a Condom Self-Efficacy Scale for College Students

This study proposed to develop and validate a scale for the college population that measures self-efficacy in using condoms. The Condom Use Self-Efficacy Scale (CUSES) was derived from several sources and consisted of 28 items describing an individual's feelings of confidence about being able to purchase condoms, put them on and take them off, and negotiate their use with a new sexual partner. This scale was administered to a sample of 768 college students. It was found to possess adequate reliability (Cronbach's alpha = .91; test-retest correlation = .81) and correlated well with the Attitude Toward the Condom Scale (r = .51) and the Contraceptive Self-Efficacy Scale for women (r = .55). Our scale also correlated with a measure of intention to use condoms (r = .40) but was unrelated to a measure of social desirability. Students who differed on measures of previous condom use as well as on sexual intercourse experience also showed significant differences on this scale in the expected direction, indicating evidence of this scale's discriminant validity. The potential uses of this scale in a college population are discussed, along with the issues underlying condom usage self-efficacy.