Psychometric properties of a revised Spanish 20-item Toronto Alexithymia Scale adaptation in multiple sclerosis patients

There have been a small number of investigations of alexithymia in multiple sclerosis (MS) using the 20-item Toronto Alexithymia Scale (TAS-20). However, the TAS-20 factor structure has not yet been evaluated in a MS patient sample, and earlier Spanish translations of this instrument require some improvement. We aimed to evaluate the factorial validity and reliability of an improved Spanish translation of the TAS-20 (the TAS-20-S). The TAS-20-S was completed by 221 MS patients. Confirmatory factor analysis was used to compare the fit of six different factor models. Internal consistency and retest reliability coefficients were also computed. The correlated three-factor model and the higher-order factor model made up of Difficulty Identifying Feelings, Difficulty Describing Feelings, and Externally Oriented Thinking achieved the best fit. Alpha coefficients ranged between .87 and .67; mean inter-item correlations ranged between .48 and .20; and retest correlations after 6 months ranged between .61 and .52. A high degree of alexithymia was present in 18.1% of the sample. Reliability and the traditional three-factor structure were demonstrated for the TAS-20-S, which can now be recommended for assessing an aspect of emotional processing in MS patients.     

Factorial validity of the 20-item Toronto Alexithymia Scale

The 20-item Toronto Alexithymia Scale (TAS-20) was developed in previous research to measure a general dimension of alexithymia with three inter correlated factors. These three factors reflect distinct facets of the alexithymia construct: (1) difficulty identifying feelings and distinguishing them from the bodily sensations of emotion, (2) difficulty describing feelings to others, and (3) an externally orientated style of thinking. This study tested the three-factor model for the TAS-20, using confirmatory factor analysis, in separate samples of young adults from Germany, Canada, and the United States. The previously established three-factor model was found to be replicable in all three samples. In addition, the full TAS-20 and its three factors demonstrated adequate internal reliability in all three samples. Although evaluation of the convergent, discriminant, and criterion validity of the TAS-20 is required in diverse cultural groups, the present results provide evidence for the factorial validity and internal reliability of the TAS-20.     

Comparison of 26-item and 20-item versions of the Toronto Alexithymia Scale for psychiatric outpatients

This study compared the 20-item revised Toronto Alexithymia Scale with the 26-item version for 257 psychiatric outpatients. Scores on the 20-item version significantly correlated with those on the 26-item inventory even when controlled for depressed mood. Furthermore, the 20-item scale showed greater internal consistency. Factor analysis for both versions indicated three subfactors but the factors in the TAS-20 accounted for greater common variance (92%) than for the factors in the TAS-26 (78%). The total variance accounted for by these factors on the TAS-20 (45%) was also greater than for the TAS-26 (38%).     

The Toronto Alexithymia Scale (TAS-20): A measure of general psychological distress

The Toronto Alexithymia Scale (Bagby, R. M., Parker, J. D. A., & Taylor, G. J. (1994). The twenty-item Toronto Alexithymia Scale-I. Item selection and cross-validation of the factor structure. Journal of Psychosomatic Research, 38, 23–32.) is the most commonly used measure of Alexithymia (= difficulties identifying and describing one’s own feelings). Sixty-three persons (34 psychiatric inpatients, 29 healthy controls) first filled in the TAS-20 and were then interviewed about their interpersonal relationships. Two raters coded the emotional experiences that the participants reported during these interviews. Contrary to expectations, participants with higher TAS-20 scores reported more emotions (particularly negative ones), and more different emotions, questioning the validity of the TAS-20 as a measure of Alexithymia. Based on correlation patterns and a joint factor analysis with two well-established measures of psychopathology, it is concluded that the TAS-20 assesses a general psychological distress factor.     

Testing the factor structure of the Forgiveness Scale among Italian adolescent students

ABSTRACT

The aim of the present study was to analysis the factor structure of the Italian version of the Forgiveness Scale (FS) among 663 adolescent students in Italy. The FS involves of 15 items measuring forgiveness toward the wrongdoer. This scale comprises two subscales, Absence of Negative (AN) and Presence of Positive (PP). These subscales evaluate the absence of negative and the existence of positive emotions, thoughts, and behavioural inclinations. Results suggests that only 11 of the original items are valid in the Italian version of the FS. In contrast to the original study, the two dimensions of forgiveness (AN and PP) were independent of each other in the current analysis. Evidence for convergent validity was also found. The results provide some initial support for the bi-dimensionality and internal consistency of the Italian FS and offer a starting point for future research to be pursued in forgiveness.     

Psychometric properties of the Bermond‐Vorst Alexithymia Questionnaire in Japanese

The aim of this research is to investigate the psychometric properties of the Japanese version of the Bermond‐Vorst Alexithymia Questionnaire (BVAQ‐J), by testing a sample of 514 undergraduates. Explanatory factor analysis of 40 items of the BVAQ‐J had a similar result to the original BVAQ ( Vorst & Bermond, 2001 ), but 10 items displayed low factor loadings (items 14, 15, 19, 25, 29, 34, 35, 36, 37, and 39); these results were slightly different from the original BVAQ. The validity and reliability of the BVAQ‐30J was suggested by a significant correlation with the Toronto Alexithymia Scale‐20 and estimates of test‐retest and internal consistency. These results suggest that this 30‐item version may be reasonably suitable for Japanese populations.     

Factorial validity and measurement invariance of the 20-item Toronto Alexithymia Scale in clinical and nonclinical samples

The most widely used instrument to measure alexithymia is the 20-item Toronto Alexithymia Scale (TAS-20). However, different factor structures have been found in different languages. This study tests six published factor models and metric invariance across clinical and nonclinical samples. It also investigated whether there is a method effect of the negatively keyed items. Second-order models with alexithymia as a higher order factor are tested. Confirmatory factor analyses showed that the original factor model with three factors-difficulty identifying feelings (DIF); difficulty describing feelings (DDF) and externally oriented thinking (EOT)-is the best fitting model. Partial measurement invariance across samples was illustrated but requires further study. A weakness of the model is the low internal consistency of the third factor. Because models with a method factor had a better fit, future reconsideration of the negatively formulated items seems necessary. No evidence was found for the second-order models.     

Measuring attachment security via the Security Scale: Latent structure,invariance across mothers and fathers and convergent validity

The Security Scale (SS) is a widely used questionnaire measuring attachment towards mother and father in school-aged children. Whilst existing evidence supports concurrent and discriminant validity of the SS, its factorial structure remains largely underexplored. The current study examined the factorial structure of the SS, explored its measurement invariance across mother and father, and evaluated its convergent validity with the Coping Strategies Questionnaire in a sample of 149 Italian children aged 8–10 years. In statistical analyses, we accounted for the ordinal nature of the data and adopted an ad hoc bootstrap procedure for the estimation of measurement invariance. Results supported the factorial validity of the SS and the structural invariance of its underlying construct across parents. Evidence for convergent validity was also found. Overall, the Italian version of the SS is a promising tool to assess attachment in school-aged children.     

Reliability and factorial validity of a Farsi version of the 20-item Toronto Alexithymia Scale with a sample of Iranian students

This study investigated the psychometric properties of the Farsi version of the 20-item Toronto Alexithymia Scale for 587 undergraduate students (349 women and 238 men) at the University of Tehran. All participants were asked to complete the Farsi version of the TAS-20, the Emotional Intelligence Scale, and the Mental Health Inventory. Findings supported the internal consistency, test-retest reliability, concurrent validity, and three-factor structure of the Farsi version of the 20-item Toronto Alexithymia Scale. The factors found in the Farsi version of this scale are similar to the three factors found previously and were accordingly labeled as Difficulty Identifying Feelings, Difficulty Describing Feelings, and Externally Oriented Thinking. The results provide evidence for applicability of the TAS-20 and its cross-cultural validity.     

Structural Validation of the Hamilton Depression Rating Scale

Despite the prolific use of the Hamilton Depression Rating Scale (HDRS), there have been no prior studies using confirmatory factor analysis (CFA) to compare competing HDRS latent structures. The current study undertakes this task, examining CFAs on 397 older adults on the most stable latent models previously posited and a new rationally derived model by Cole and Motivala. CFAs were evaluated in their original first-order structure and in hierarchically related counterparts. All hierarchical models performed significantly better than their first-order counterparts. Moreover, the hierarchical Cole and Motivala model was significantly better on all comparative criteria than any of the other models. However, none of the tested models obtained sufficient fit with the data suggesting psychometric, scoring, or content limitations of the scale.     

Alexithymia and its measurement: confirmatory factor analyses of the 20‐item Toronto Alexithymia Scale and the Bermond–Vorst Alexithymia Questionnaire

Alexithymia refers to the difficulties an individual has in experiencing and expressing feelings. The 20‐item Toronto Alexithymia Scale (TAS‐20) and the Bermond–Vorst Alexithymia Questionnaire (BVAQ) with two parallel versions of 20 items have been constructed to measure it. The present study compared the psychometric properties of these two self‐report questionnaires in English (N=290) and French (N=322) language versions. Confirmatory factor analysis was used to examine the fit between the hypothesized factors and the data. Results revealed a better fit to the data for the second version of the BVAQ (BVAQ‐20B) for both language versions as compared to the TAS‐20, the whole BVAQ, or the first version of the BVAQ (BVAQ‐20A). Additionally, the factor comparison of both language versions indicated that only the factorial structure of the BVAQ‐20B was replicable across languages. Concurrent validity of the questionnaires is discussed. Copyright © 1999 John Wiley & Sons, Ltd.     

The structure of the Beck Hopelessness Scale: A confirmatory factor analysis in UK students

The aim of this paper was to confirm the factor structure of the 20-item Beck Hopelessness Scale in a non-clinical population. Previous research has highlighted a lack of clarity in its construct validity with regards to this population.Based on previous factor analytic findings from both clinical and non-clinical studies, 13 separate confirmatory factor models were specified and estimated using LISREL 8.72 to test the one, two and three-factor models.Psychology and medical students at Queen’s University, Belfast (n = 581) completed both the BHS and the Beck Depression Inventory (BDI).All models showed reasonable fit, but only one, a four-item single-factor model demonstrated a non-significant chi-squared statistic. These four items can be used to derive a Short-Form BHS (SBHS) in which increasing scores (0-4) corresponded with increasing scores in the BDI. The four items were also drawn from all three of Beck’s proposed triad, and included both positively and negatively scored items.This study in a UK undergraduate non-clinical population suggests that the BHS best measures a one-factor model of hopelessness. It appears that a shorter four-item scale can also measure this one-factor model.     

A Swedish adaptation of the Emotional Contagion Scale: factor structure and psychometric properties

The Emotional Contagion Scale (ECS) is a self-report scale used to measure individual differences in susceptibility to converge towards the emotions expressed by others. The original American ECS (Doherty, 1997), translated into Swedish, was completed by 665 undergraduate students in two independent samples (N = 233 and N = 432, respectively). To investigate the factor structure of the ECS, confirmatory factor analyses of alternative models derived from previous research in emotion and emotional contagion were conducted. The results showed that the proposed one-dimensional structure of the ECS was not tenable. Instead a multi-facet model based on a differential emotions model and a hierarchal valence/differential emotions model was supported. Cross-validation on the second independent sample demonstrated and confirmed the multi-faceted property of the ECS and the equality of the factor structure across samples and genders. With regard to homogeneity and test-retest reliability, the Swedish version showed acceptable results and was in concordance with the original version.     

Psychometric Evaluation of the Career Decision Scale With Iranian Undergraduate Students

The authors examined the reliability and construct validity of the Career Decision Scale (Osipow, Carney, & Barak, 1976 ) with 1,610 freshman and sophomore students from public universities from a southwestern state in Iran. A Cronbach's alpha of .80 provided strong support for the scale's reliability. Exploratory factor analysis results indicated a 2‐factor model (Diffusion and Internal/External Barriers) of the scale with Iranian students, which was confirmed by confirmatory factor analysis. Implications and recommendations for further research are discussed.     

The dimensionality of the 12-item version of the Eating Attitudes Test. Confirmatory factor analyses

The assumed three-dimensional structure of the 12-item version of the Eating Attitudes Test was examined by confirmatory factor analysis in a non-clinical sample of 224 female and 261 male adolescents in grade 8 aged 14-15 years. Alternative models were examined. Data did neither support a three-dimensional structure, nor a one-dimensional structure using twelve items. Three dimensions were supported when one and three items were omitted from the girls' and boys' analyses, respectively. A second order factor structure was supported in both genders. Conceptual and psychometric issues are discussed. A discussion of the measurement domain of the eating problem construct in non-clinicals is warranted.     

Assessing Alexithymia: Psychometric Properties and Factorial Invariance of the 20-Item Toronto Alexithymia Scale in Nonclinical and Psychiatric Samples

The 20-item Toronto Alexithymia Scale (TAS-20) is a self-report questionnaire designed to measure the three components of alexithymia; difficulty identifying feelings in the self (DIF), difficulty describing feelings (DDF), and externally orientated thinking (EOT). We examined the scale’s psychometric properties in Australian nonclinical (N = 428) and psychiatric (N = 156) samples. In terms of factorial validity, confirmatory factor analyses found the traditional 3-factor correlated model (DIF, DDF, EOT) to be the best and most parsimonious solution, but it did not reach adequate levels of goodness-of-fit in either sample. Several EOT items loaded poorly on their intended factor, and a reverse-scored item method factor was present; the factor structure of the scale was invariant across both samples. A higher-order factor model (with a single higher-order factor) was slightly inferior to the correlated models, but still tenable. The total scale score and DIF and DDF subscales displayed sound internal consistency, but the EOT subscale did not. We conclude that the TAS-20 has, for the most part, adequate psychometric properties, though interpretation should focus only on the total scale score and DIF and DDF subscales; we recommend the EOT subscale score not be used. Implications for clinical use and future revision of the scale are discussed.     

Dimensionality of stress experiences: Factorial structure of the Perceived Stress Questionnaire (PSQ) in a population‐based Swedish sample

We investigated the factorial structure of the Perceived Stress Questionnaire (PSQ‐recent; Levenstein, Prantera, Varvo et al., 1993) in a large (N = 1516; 35–95 years) population‐based Swedish sample (Nilsson, Adolfsson, Bäckman et al., 2004; Nilsson, Bäckman, Erngrund et al., 1997). Exploratory principal components analysis (PCA) was conducted on a first, randomly drawn subsample (n = 506). Next, the model based on the PCA was tested in a second sample (n = 505). Finally, a third sample (n = 505) was used to cross‐validate the model. Five components were extracted in the PCA (eigenvalue > 1) and labeled “Demands,” “Worries/Tension,” “Lack of joy,” “Conflict,” and “Fatigue,” respectively. Twenty‐one out of the 30 original PSQ items were retained in a confirmatory factor analysis (CFA) model that included the five (first‐order) factors and, additionally, a general (second‐order) stress factor, not considered in prior models. The model showed reasonable goodness of fit [χ²(184) = 511.2, p < 0.001; CFI = 0.904; RMSEA = 0.059; and SRMR = 0.063]. Multigroup confirmatory factor analyses supported the validity of the established model. The results are discussed in relation to prior investigations of the factorial structure of the PSQ.     

Reexamining the factor structure of the 20-item Toronto alexithymia scale: commentary on Gignac, Palmer, and Stough

Gignac, Palmer, and Stough (2007/this issue) test a number of different latent factor models for the TAS-20 using a community sample of 355 participants and conclude that this scale is best represented by a "nested factors model," with five substantive factors and a method factor. Gignac et al. also report that the correlated three-factor model and a comparable higher order model supported by most studies produced poor levels of incremental close fit. In this article, we challenge Gignac et al.'s unheralded and largely unsupported use of nested model fitting and the uncritical acceptance of exceptionally high cutoff levels to assess goodness of fit (GOF). Using more traditional and empirically supported model testing procedures and a more flexible approach to the interpretation of multiple tests of GOF, we interpret Gignac et al.'s results as actually supportive of the traditional three-factor model and one that has been recovered in 17 of the 24 factor analytic studies of the TAS-20.     

The factor structure and composite reliability of the Rosenberg Self-Esteem Scale among ex-prisoners

The aim of this study was to examine the factor structure and composite reliability of the Rosenberg Self-Esteem Scale (RSES) using a sample of 669 ex-prisoners identified in the National Survey of American Life. Six distinct factor models, with uncorrelated measurement error terms, were specified and tested using confirmatory factor analysis (CFA). Results indicated that the two-factor model consisting of positive and negative latent variables provided a better fit to the data than the alternative models. Moreover, only positive self-esteem was a significant predictor of recidivism. Composite reliability indicated that the two factors were measured with very good reliability. The results consequently provide additional support for a two-dimensional model of the RSES within offender populations.