A reliability coefficient for maximum likelihood factor analysis

Tucker, Ledyard R.; Lewis, Charles

doi:10.1007/bf02291170

Cited by 6,096 publications

(3,765 citation statements)

References 9 publications

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“…Goodness of fit for each model was assessed with a range of fit indices including the chi-square ( χ 2 ), the comparative fit index (CFI; Bentler, 1990), and the Tucker-Lewis Index (TLI; Tucker & Lewis, 1973). A non-significant χ 2 and values greater than .90 for the CFI and TLI were considered to reflect acceptable model fit.…”

Section: Methodsmentioning

confidence: 99%

A psychometric assessment of Disturbances in Self-Organization symptom indicators for ICD-11 Complex PTSD using the International Trauma Questionnaire

Shevlin

Hyland

Roberts

et al. 2018

European Journal of Psychotraumatology

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Background: Two ‘sibling disorders’ have been proposed for the 11th version of the International Classification of Diseases (ICD-11): Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). To date, no research has attempted to identify the optimal symptom indicators for the ‘Disturbances in Self-Organization’ (DSO) symptom cluster. Objective: The aim of the current study was to assess the psychometric performance of scores of 16 potential DSO symptom indicators from the International Trauma Questionnaire (ITQ). Criteria relating to score variability and their ability to discriminate were employed. Method: Participants (N = 1839) were a nationally representative household sample of non-institutionalized adults currently residing in the US. Item scores from the ITQ were examined in relation to basic criteria associated with interpretability, variability, homogeneity, and association with functional impairment. The performance of the DSO symptoms was also assessed using 1- and 2-parameter item response theory (IRT) models. Results: The distribution of responses for all DSO indicators met the criteria associated with interpretability, variability, homogeneity, and association with functional impairment. The 1-parameter graded response model was considered the best model and indicated that each set of indictors performed very similarly. Conclusions: The ITQ contains 16 DSO symptom indicators and they perform well in measuring their respective symptom cluster. There was no evidence that particular indicators were ‘better’ than others, and it was concluded that the indicators are essentially interchangeable.

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Section: Methodsmentioning

confidence: 99%

A psychometric assessment of Disturbances in Self-Organization symptom indicators for ICD-11 Complex PTSD using the International Trauma Questionnaire

Shevlin

Hyland

Roberts

et al. 2018

European Journal of Psychotraumatology

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“…To assess the goodness of fit for each model a range of fit statistics was examined, including the comparative fit index (CFI) (Bentler, 1990), the Tucker–Lewis Index (TLI) (Tucker & Lewis, 1973), a non-significant chi-squared statistic ( χ 2 ) and the root mean square error of approximation (RMSEA) (Steiger, 1990). Specifically, a CFI/TLI above 0.90 is indicative of acceptable model fit.…”

Section: Methodsmentioning

confidence: 99%

Testing competing factor models of the latent structure of post-traumatic stress disorder and complex post-traumatic stress disorder according to ICD-11

Murphy

Elklit

Dokkedahl

et al. 2018

European Journal of Psychotraumatology

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With the publication of the International Statistical Classification of Diseases and Related Health Problems, 11th edition (ICD-11) due for release in 2018, a number of studies have assessed the factorial validity of the proposed post-traumatic stress disorder (PTSD) and complex (CPTSD) diagnostic criteria and whether the disorders are correlated but distinct constructs. As the specific nature of CPTSD symptoms has yet to be firmly established, this study aimed to examine the dimension of affect dysregulation as two separate constructs representing hyper-activation and hypo-activation. Seven alternative models were estimated within a confirmatory factor analytic framework using the International Trauma Questionnaire (ITQ). Data were analysed from a young adult sample from northern Uganda (n = 314), of which 51% were female and aged 18–25 years. Forty per cent of the participants were former child soldiers (n = 124) while the remainder were civilians (n = 190). The prevalence of CPTSD was 20.8% and PTSD was 13.1%. The results indicated that all models that estimated affective dysregulation as distinct but correlated constructs (i.e. hyper-activation and hypo-activation) provided satisfactory model fit, with statistical superiority for a seven-factor first-order correlated model. Furthermore, individuals who met the criteria for CPTSD reported higher levels of war experiences, symptoms of anxiety and depression, and somatic problems than those with PTSD only and no diagnosis. There was also a much larger proportion of former child soldiers that met the criteria for a CPTSD diagnosis. In conclusion, these results partly support the factorial validity of the ICD-11 proposals for PTSD and CPTSD in a non-Western culture exposed to mass violence. These findings highlight that more research is required across different cultural backgrounds before firm conclusions can be made regarding the factor structure of CPTSD using the ITQ.

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“…If the bootstrapped 95% confidence interval (CI) did not include zero, the indirect effects were accepted as significant. Adequacy of fit of the serial mediation model was tested using Chi-Square and incremental goodness-of-fit indexes: RMSEA < .05 (Browne & Cudeck, 1992), CFI and TLI < .90 (Tucker & Lewis, 1973) and SRMR < .08 (Hu & Bentler, 1999). The model had an acceptable goodness of fit (Chi-square = .19, df = 1, p = .66; RMSEA = 0.00; CFI = 1; TLI = 1; SRMR = .01).…”

Section: Mediation Analysesmentioning

confidence: 99%

Correlational study and randomised controlled trial for understanding and changing red meat consumption: The role of eating identities

Carfora

Caso

Conner

2017

Social Science & Medicine

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Rationale: The present studies aimed to contribute to the literature on psychological variables involved in reducing red meat consumption (RMC).Objective: Study 1 investigated whether the theory of planned behaviour (TPB), plus healthy-eating and meat-eating identities, could explain intentions to reduce RMC. Study 2 evaluated the effectiveness of an SMS intervention on self-monitoring to reduce RMC.Methods: In Study 1, data were collected daily using online food diaries for one week and a TPB questionnaire. Study 2 was a randomised controlled trial assessing pre and post RMC and TPB constructs by online food diaries and questionnaires over a one-week period. Participants were Italian undergraduates in each study (Study 1: N = 405; Study 2: N = 244). In Study 2, participants were randomly allocated to control and message condition groups. Participants in the message condition group received a daily SMS, which reminded them to monitor RMC, while participants in the control group did not receive any message. Only students who completed all measures were considered in the analyses (Study 1: N = 342; Study 2: N = 228).Results: Study 1 showed that affective and instrumental attitudes, perceived behavioural control and meat-eating identity explained intentions to reduce RMC, while subjective norm, past behaviour and healthy-eating identity did not. Study 2 showed that an SMS intervention was effective in increasing intentions and reducing RMC. Mediation analyses indicated partial serial mediation through healthy-eating and meat-eating identities and intentions.Conclusion: The present studies provide support for the predictive validity of TPB in explaining intentions to reduce RMC and for the efficacy of an SMS intervention targeting self-monitoring in reducing RMC. Findings confirmed the important role of eating identities in explaining intentions to reduce RMC and in changing this behaviour.

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A reliability coefficient for maximum likelihood factor analysis

Cited by 6,096 publications

References 9 publications

A psychometric assessment of Disturbances in Self-Organization symptom indicators for ICD-11 Complex PTSD using the International Trauma Questionnaire

A psychometric assessment of Disturbances in Self-Organization symptom indicators for ICD-11 Complex PTSD using the International Trauma Questionnaire

Testing competing factor models of the latent structure of post-traumatic stress disorder and complex post-traumatic stress disorder according to ICD-11

Correlational study and randomised controlled trial for understanding and changing red meat consumption: The role of eating identities

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