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Perseverative Thinking Questionnaire: Confirmatory factor analysis with two different samples

  • J. Azevedo (a1), A.T. Pereira (a2), A.P. Amaral (a2) (a3), V. Nogueira (a2), M.J. Soares (a2), D. Mota (a2) (a4) and A. Macedo (a2) (a4)...

Abstract

Introduction

Perseverative Negative Thinking (PNT) is a transdiagnostic cognitive process [1] characterized by repetitiveness, intrusiveness and difficulties to disengage (Ehring, 2011). The Perseverative Thinking Questionnaire (PTQ-15; [2]) is a self-reported instrument, developed to evaluate these characteristics. The Portuguese version assess two meaningful dimensions – Repetitive thoughts (RT); and Cognitive interference and unproductiveness (CIU) [3].

Aim

To confirm the bi-dimensional structure of the PTQ-15 using Confirmatory Factor Analysis, in two distinct samples.

Method

A sample composed of 256 students (Mean age = 20.58 ± 1.870; 78.1% girls) and a sample composed of 480 adults from the community (parents of the students; mean age = 50.84 ± 5.310; 53.1% women) filled the PTQ-15. We used software AMOS.

Results

The second-order model of PTQ-15 with two dimensions presented good fit, in both students (CMIN = 2.449; RMSEA = 0.075; CFI = 0.958, TLI = 0.949, PGFI = 0.776; P < 0.001) and their parents (CMIN = 3.46; RMSEA = 0.072, CFI = 0.955, TLI = 0.942, PGFI = 0.632; P < 0.001). Internal consistency of the total scale, measured though Cronbach's alpha was α = 0.95/0.94; both factors presented good/excellent reliability: repetitive thoughts (a = 0.93/0.92); cognitive interference and unproductiveness (a = 0.88/0.92).

Conclusion

Taken together, both CFAs provided additional evidence that PTQ-15 is an adequate measure for perseverative thinking.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

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References

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[1]Ehring, T.Watkins, E.R.Repetitive negative thinking as a transdiagnostic process. Int J Cogn Ther 2008;1(3):19220510.1521/ijct.2008.1.3.192
[2]Ehring, T., et al.The Perseverative Thinking Questionnaire (PTQ): validation of a content-independent measure of repetitive negative thinking. J Behav Ther Exp Psychiatry 2011;42(2):22523210.1016/j.jbtep.2010.12.003
[3]Chaves, B., et al. Preservative thinking questionnaire: validation of the Portuguese version. Congresso Mundial de Comportamentos de Saúde infanto-juvenil Maio, Viseu, Portugal 2013

Perseverative Thinking Questionnaire: Confirmatory factor analysis with two different samples

  • J. Azevedo (a1), A.T. Pereira (a2), A.P. Amaral (a2) (a3), V. Nogueira (a2), M.J. Soares (a2), D. Mota (a2) (a4) and A. Macedo (a2) (a4)...

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Perseverative Thinking Questionnaire: Confirmatory factor analysis with two different samples

  • J. Azevedo (a1), A.T. Pereira (a2), A.P. Amaral (a2) (a3), V. Nogueira (a2), M.J. Soares (a2), D. Mota (a2) (a4) and A. Macedo (a2) (a4)...
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