Development and validation of a Manic Thought Inventory.

Feb 27, 2023

Experts: Imke Hanssen,Peter Ten Klooster,Marloes Huijbers,Marc Lochmann van Bennekom,Elvira Boere,Ebtisam El Filali,Bart Geerling,Peter Goossens,Ralph Kupka,Anne Speckens,Eline Regeer

This article describes the development and psychometric evaluation of the Manic Thought Inventory (MTI), a patient-driven self-report inventory to assess the presence of typical (hypo)manic cognitions.
The initial item pool was generated by patients with bipolar disorder(BD) type I, and assessed for suitability by five psychiatrists specialized in treating BD. Study 1 describes the item analysis and exploratory factor structure of the MTI in a sample of 251 patients with BD type I. In study 2, the factor structure was validated with a confirmatory factor analysis and convergent and divergent validity were assessed in an independent sample of 201 patients with BD type I.
Study 1 resulted in a 50-item version of the MTI measuring one underlying factor. Study 2 confirmed the essentially unidimensional underlying construct in a 47-item version of the MTI. Internal consistency of the 47-item version of the MTI was excellent (α = 0.97). The MTI showed moderate to large positive correlations with other measures related to mania. It was not correlated with measures of depression.
The MTI showed good psychometric properties and can be useful in research and clinical practice. Patients could use the MTI to select items that they recognize as being characteristic for their (hypo)manic episodes. By monitoring and challenging these items, the MTI could augment current psychological interventions for BD.

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ABOUT THE EXPERTS

Imke Hanssen,Peter Ten Klooster,Marloes Huijbers,Marc Lochmann van Bennekom,Elvira Boere,Ebtisam El Filali,Bart Geerling,Peter Goossens,Ralph Kupka,Anne Speckens,Eline Regeer

Imke Hanssen

Radboud University Medical Center, Department of Psychiatry, Center for Mindfulness, Reinier Postlaan 4, GC, Nijmegen, the Netherlands.

Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Heyendaalseweg, Nijmegen, the Netherlands.

Peter Ten Klooster

University of Twente, Faculty of Behavioural, Management, and Social Sciences, De Zul 10, NJ, Enschede, The Netherlands.

Marloes Huijbers

Radboud University Medical Center, Department of Psychiatry, Center for Mindfulness, Reinier Postlaan 4, GC, Nijmegen, the Netherlands.

Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Heyendaalseweg, Nijmegen, the Netherlands.

Marc Lochmann van Bennekom

Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Heyendaalseweg, Nijmegen, the Netherlands.

Pro Persona Mental Health Care, Outpatient clinic for Bipolar Disorders, Nijmeegsebaan 61, 6525 DX, Nijmegen, the Netherlands.

Elvira Boere

PsyQ Department of Mood Disorders, Max Euwelaan 70, 3062, MA, Rotterdam, the Netherlands.

Leiden University Medical Center, Department of Psychiatry, Albinusdreef 2, ZA, Leiden, the Netherlands.

Ebtisam El Filali

PsyQ Department of Mood Disorders, Lijnbaan 4, 2512, VA, The Hague, the Netherlands.

Bart Geerling

University of Twente, Faculty of Behavioural, Management, and Social Sciences, De Zul 10, NJ, Enschede, The Netherlands.

Dimence Mental Health, Center for Bipolar Disorders, Pikeursbaan 3, 7411, GT, Deventer, the Netherlands.

Peter Goossens

Dimence Mental Health, Center for Bipolar Disorders, Pikeursbaan 3, 7411, GT, Deventer, the Netherlands.

University Centre for Nursing and Midwifery, Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.

Ralph Kupka

University of Twente, Faculty of Behavioural, Management, and Social Sciences, De Zul 10, NJ, Enschede, The Netherlands.

Amsterdam University Medical Center, Vrije Universiteit, Department of Psychiatry, Oldenaller 1, HJ, Amsterdam, the Netherlands.

Anne Speckens

Radboud University Medical Center, Department of Psychiatry, Center for Mindfulness, Reinier Postlaan 4, GC, Nijmegen, the Netherlands.

Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Heyendaalseweg, Nijmegen, the Netherlands.

Eline Regeer

Altrecht Institute for Mental Health Care, Outpatient clinic for Bipolar Disorders, Lange Nieuwstraat 119, PG, Utrecht, the Netherlands.