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Lau JTF, Dang L, Cheung RYH, Zhang MX, Chen JH, Wu AMS. The psychometric properties of the Revised Illness Perception Questionnaire (IPQ-R) regarding Internet gaming disorder in a general population of Chinese adults. J Behav Addict 2020; 9:654-663. [PMID: 32897871 PMCID: PMC8943670 DOI: 10.1556/2006.2020.00043] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 04/14/2020] [Accepted: 06/13/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND AIMS Internet gaming disorder (IGD) has been recognized as a mental illness. Cognitive and emotional illness representations affect coping and health outcomes. Very little is known about such perceptions related to IGD, in both general and diseased populations. This study examined the psychometric properties of the Revised Illness Perception Questionnaire (IPQ-R) for IGD in a general population that included mostly non-cases while a small proportion of the sample was IGD cases. METHODS An anonymous cross-sectional telephone survey was conducted in a random sample of 1,501 Chinese community-dwelling adults (41.3% male; mean age = 40.42, SD = 16.85) in Macao, China. RESULTS The confirmatory factor analysis identified a modified 6-factor model (i.e., timeline cyclical, consequences, personal control, treatment control, illness coherence, and emotional representations) of 26 items that showed satisfactory model fit and internal consistency. Criterion-related validity was supported by the constructs' significant correlations with stigma (positive correlations: timeline cyclical, consequence, emotional representations; negative correlations: illness coherence). Ever-gamers, compared to never-gamers, reported higher mean scores in the subscales of personal control and illness coherence, and lower mean scores in time cyclical, consequence, and emotional representations. Among the sampled gamers, probable IGD cases were more likely than non-IGD cases to perceive IGD as cyclical and involved more negative emotions. CONCLUSIONS This study shows that the revised 26-item version of IPQ-R is a valid instrument for assessing illness representation regarding IGD in a general population of Chinese adults. It can be used in future research that examines factors of incidence and prevention related to IGD.
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Affiliation(s)
- Joseph T. F. Lau
- Centre for Health Behaviors Research, School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Le Dang
- Department of Psychology, Faculty of Social Sciences, University of Macau, Taipa, Macau, China,Centre for Cognitive and Brain Sciences, University of Macau, Taipa, Macau, China,Faculty of Teacher Education, Pingdingshan University, South Weilai Road, Xinhua District, Pingdingshan, Henan, China
| | - Ray Y. H. Cheung
- Department of Applied Psychology, Faculty of Social Science, Lingnan University, Hong Kong, China
| | - Meng Xuan Zhang
- Department of Psychology, Faculty of Social Sciences, University of Macau, Taipa, Macau, China,Centre for Cognitive and Brain Sciences, University of Macau, Taipa, Macau, China
| | - Juliet Honglei Chen
- Department of Psychology, Faculty of Social Sciences, University of Macau, Taipa, Macau, China
| | - Anise M. S. Wu
- Department of Psychology, Faculty of Social Sciences, University of Macau, Taipa, Macau, China,Centre for Cognitive and Brain Sciences, University of Macau, Taipa, Macau, China,Corresponding author. E-mail:
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Greenwood K, Alford K, O’Leary I, Peters E, Hardy A, Cavanagh K, Field AP, de Visser R, Fowler D, Davies M, Papamichail A, Garety P. The U&I study: study protocol for a feasibility randomised controlled trial of a pre-cognitive behavioural therapy digital 'informed choice' intervention to improve attitudes towards uptake and implementation of CBT for psychosis. Trials 2018; 19:644. [PMID: 30458850 PMCID: PMC6247503 DOI: 10.1186/s13063-018-3023-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 10/26/2018] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND At least 40% of people with psychosis have persistent distressing symptoms despite optimal medication treatment. Cognitive behaviour therapy for psychosis (CBTp) is the only NICE-recommended individual therapy for psychosis, with effects on symptoms, distress and quality of life. Yet <10% of service-users receive it and 94% of trusts struggle to provide it. Of those offered it, 22-43% refuse or do not attend. We have developed a new pre-CBTp informed choice intervention to address knowledge and attitudes that influence uptake and implementation and now want to test it in a feasibility trial. METHODS The design is a two-arm, feasibility randomised controlled trial (RCT), with 1:1 randomisation, stratified by participant group and site. Participants are 40 psychosis patients and 40 clinicians, who are ambivalent towards uptake or implementation of CBTp. Sites are community and inpatient services in Sussex and London. The intervention is a pre-CBT digital psychoeducation intervention designed to address identified knowledge and attitudinal barriers to uptake and implementation of CBTp, incorporating behaviour change mechanisms, and supported by animated introductory, patient and clinician stories. The comparator is the NHS choices website for CBT. The primary aim is to assess clinical feasibility (recruitment, randomisation, acceptability, use, delivery, outcome measurement, retention). A secondary aim is a preliminary evaluation of efficacy. Outcomes will be assessed at baseline, post intervention, and one-month follow-up (blind to treatment arm). The primary efficacy outcome is likelihood of offering/taking up CBTp. Secondary outcomes include knowledge and attitudes towards CBTp, illness perceptions, empowerment, psychological wellbeing (patients only) and CBTp implementation (clinicians only). Use of the intervention and CBT behaviours during the follow-up period will be recorded and captured in a feedback questionnaire. Use, acceptability and experience of outcome assessment will be explored in qualitative interviews with participants (n = 6 per group). The efficacy evaluation will report descriptive data, key model parameters and 95% highest probability density intervals in a Bayesian growth model. DISCUSSION This is the first feasibility trial of a digital 'informed choice' decision aid for the implementation of CBTp. If the trial proves feasible and demonstrates preliminary evidence of efficacy, a large multi-site trial will be warranted. TRIAL REGISTRATION ISRCTN registry, ISRCTN53107879 . Registered prospectively on 2 August 2017.
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Affiliation(s)
- Kathryn Greenwood
- R&D Department, Sussex Partnership NHS Foundation Trust, Sussex Education Centre, Millview Hospital Site, Nevill Avenue, Hove, BN3 7HZ UK
- School of Psychology, University of Sussex, Pevensey Building, Falmer, Brighton, East Sussex BN1 9RP UK
| | - Katie Alford
- Brighton and Sussex Medical School, University of Sussex, Falmer, Brighton, BN1 9RP UK
| | - Ian O’Leary
- R&D Department, Sussex Partnership NHS Foundation Trust, Sussex Education Centre, Millview Hospital Site, Nevill Avenue, Hove, BN3 7HZ UK
| | - Emmanuelle Peters
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, De Crespigny Park, Denmark Hill, London, SE5 8AF UK
- PICuP Clinic, South London and Maudsley NHS Foundation Trust, Maudsley Hospital, Denmark Hill, London, SE5 8NZ UK
| | - Amy Hardy
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, De Crespigny Park, Denmark Hill, London, SE5 8AF UK
- South London and Maudsley NHS Foundation Trust, Bethlem Royal Hospital, Monks Orchard Road, Beckenham, Kent BR3 3BX UK
| | - Kate Cavanagh
- School of Psychology, University of Sussex, Pevensey Building, Falmer, Brighton, East Sussex BN1 9RP UK
| | - Andy P. Field
- School of Psychology, University of Sussex, Pevensey Building, Falmer, Brighton, East Sussex BN1 9RP UK
| | - Richard de Visser
- School of Psychology, University of Sussex, Pevensey Building, Falmer, Brighton, East Sussex BN1 9RP UK
| | - David Fowler
- R&D Department, Sussex Partnership NHS Foundation Trust, Sussex Education Centre, Millview Hospital Site, Nevill Avenue, Hove, BN3 7HZ UK
- School of Psychology, University of Sussex, Pevensey Building, Falmer, Brighton, East Sussex BN1 9RP UK
| | - Matthew Davies
- R&D Department, Sussex Partnership NHS Foundation Trust, Sussex Education Centre, Millview Hospital Site, Nevill Avenue, Hove, BN3 7HZ UK
| | - Alexandra Papamichail
- R&D Department, Sussex Partnership NHS Foundation Trust, Sussex Education Centre, Millview Hospital Site, Nevill Avenue, Hove, BN3 7HZ UK
| | - Philippa Garety
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, De Crespigny Park, Denmark Hill, London, SE5 8AF UK
- South London and Maudsley NHS Foundation Trust, Bethlem Royal Hospital, Monks Orchard Road, Beckenham, Kent BR3 3BX UK
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Aberkane S. Psychometric Testing of an Arabic Translation of the Revised-Illness Perception Questionnaire (IPQ-R) for Chronic Illness Patients. Malays J Med Sci 2017; 24:74-85. [PMID: 28951692 DOI: 10.21315/mjms2017.24.4.9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 07/06/2017] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND Researchers lack a properly validated instrument to measure perceptions of chronic disease in Arabic language contexts. This study aimed to adapt and validate the Revised-Illness Perception Questionnaire (IPQ-R) for Arabic speaking chronic illness patients. METHODS A cross-sectional design was conducted to examine the psychometric properties of the adapted English version of the IPQ-R for Arabic speaking chronic illness patients. The study instrument was an Arabic version of the IPQ-R prepared through a translation process. The reliability and validity of the instrument were assessed using exploratory and confirmatory factor analysis and Cronbach's alpha coefficient. Three hundred and sixteen participants (ages 16-79) from the Batna region in Algeria completed the IPQ-R. RESULTS A total of 316 (100%) patients responded to this study. Regarding internal consistency, Cronbach's alpha a coefficient was consistently higher than 0.45. Several areas of fit were identified and substantial changes to the measurement model were made, such as the deletion of 22 items from the original 38-item IPQ-R and two items from the original 18 causal items this accounted for 64.63% of the total variance, and the respecification of indicators had to be applied to achieve acceptable model fit. The final model consists of two sections: The 16-item Arabic IPQ-R, which had a good fit; (CMIN/Df = 1.30, P < 0.001, CFI = 0.93, RMSEA = 0.08, SRMR = 0.03), and was similar to the Arabic 16 causal items (CMIN/DF = 1.11, P < 0.001, CFI = 0.95, RMSEA = 0.080, SRMR = 0.02). CONCLUSION The factor structure concurred with prior finding despite differences to the type of sample and cultural considerations that might explain these findings. Replication of this study in Algerian patients with specific illness, such as silicosis, breast cancer and multiple sclerosis. Further psychometric testing on other large samples is recommended.
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Affiliation(s)
- Salah Aberkane
- Department of Psychology, Faculty of Human and Social Sciences, University of Khenchela, Algeria
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McCorkindale S, Fleming MP, Martin CR. Perceptions of learning disability nurses and support staff towards people with a diagnosis of schizophrenia. J Psychiatr Ment Health Nurs 2017; 24:282-292. [PMID: 28248434 DOI: 10.1111/jpm.12381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/24/2017] [Indexed: 11/29/2022]
Abstract
UNLABELLED WHAT IS KNOWN ABOUT THE SUBJECT?: People with learning disability are more likely than the general population to develop schizophrenia. Personal recovery philosophies are based on positive attitudes and an optimism that recognizes and values people and their strengths and capacity to achieve goals. Little is known from previous studies about the illness perceptions of learning disability practitioners who work with people that experience both a learning disability and schizophrenia. The illness beliefs of learning disability practitioners about schizophrenia may mediate the potential for social exclusion and limit recovery outcomes. WHAT THIS STUDY/PAPER ADDS TO EXISTING KNOWLEDGE?: The findings show that the illness beliefs of learning disability practitioners and support workers regarding schizophrenia are pessimistic in terms of the consequences for people with schizophrenia and learning disability and their relatives as well as the chronic course of the illness. WHAT ARE THE IMPLICATIONS FOR CLINICAL PRACTICE?: This study identifies the nature of LD practitioner perceptions about schizophrenia and provides guidance about how personal recovery philosophies can be applied to the management of LD and schizophrenia. The beliefs of learning disability practitioners and support workers regarding schizophrenia need to be reframed to support better recovery outcomes and social inclusion for this group. The findings from this study can inform the development of training in bio-psycho-social models of schizophrenia, recovery approaches, family/carer interventions, clinical supervision, mentorship and reflection on clinical practice, which could be potentially useful strategies to help facilitate a reframing of beliefs. ABSTRACT Background and purpose of study The prevalence of schizophrenia in people with learning disability is 3-4%. This is the first study to investigate the illness perceptions of learning disability (LD) practitioners towards people with schizophrenia. Methods Learning disability practitioners (n = 210) that work with people with LD and schizophrenia completed a modified version of the Illness Perception Questionnaire Schizophrenia Carers Version (IPQ-SCV). Descriptive and correlational analyses were conducted for all of the IPQ-SCV subscales. Results A significant positive correlation was found between consequences relative and consequences patient (0.495, P < 0.001), and a negative correlation was found between timeline episodic and timeline chronic (-0.243, P < 0.001) subscales. Discussion Consistent with previous evidence found regarding negative staff attitudes to schizophrenia recovery outcomes, course and chronicity, the current investigation has extended and confirmed these observations to staff working with individuals with comorbid schizophrenia and learning disability. Implications for practice This study identifies the nature of LD practitioner perceptions about schizophrenia and contributes to the development of the recovery philosophy in relation to the management of LD and schizophrenia. The findings inform the design of training modules in bio-psycho-social models of schizophrenia, recovery approaches, family intervention, clinical supervision and reflection. These can help LD practitioners to reframe their schizophrenia/LD illness beliefs.
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Affiliation(s)
- S McCorkindale
- Inverclyde Community Learning Disabilities Team, Cathcart Centre, Greenock, UK
| | - M P Fleming
- School of Health and Social Care, Edinburgh Napier University, Edinburgh, UK
| | - C R Martin
- Faculty of Society and Health, Buckinghamshire New University, Uxbridge, Middlesex, UK
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Ayu AP, Dijkstra B, Golbach M, De Jong C, Schellekens A. Good Psychometric Properties of the Addiction Version of the Revised Illness Perception Questionnaire for Health Care Professionals. PLoS One 2016; 11:e0164262. [PMID: 27824872 PMCID: PMC5100923 DOI: 10.1371/journal.pone.0164262] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 09/22/2016] [Indexed: 12/21/2022] Open
Abstract
Background Addiction, or substance dependence, is nowadays considered a chronic relapsing condition. However, perceptions of addiction vary widely, also among healthcare professionals. Perceptions of addiction are thought to contribute to attitude and stigma towards patients with addiction. However, studies into perceptions of addiction among healthcare professionals are limited and instruments for reliable assessment of their perceptions are lacking. The Illness Perception Questionnaire (IPQ) is widely used to evaluate perceptions of illness. The aim of this study was to evaluate the psychometric properties of the IPQ: factor structure, internal consistency, and discriminant validity, when applied to evaluate healthcare professionals’ perceptions of addiction. Methods Participants were 1072 healthcare professionals in training and master students from the Netherlands and Indonesia, recruited from various addiction-training programs. The revised version of the IPQ was adapted to measure perceptions of addiction (IPQ-A). Maximum likelihood method was used to explore the best-fit IPQ factor structure. Internal consistency was evaluated for the final factors. The final factor structure was used to assess discriminant validity of the IPQ, by comparing illness perceptions of addiction between 1) medical students from the Netherlands and Indonesia, 2) medical students psychology students and educational science students from the Netherlands, and 3) participants with different training levels: medical students versus medical doctors. Results Factor analysis revealed an eight-factor structure for the perception subscale (demoralization, timeline chronic, consequences, personal control, treatment control, illness coherence, timeline cyclical emotional representations) and a four-factor structure for the attribution subscale (psychological attributions, risk factors, smoking/alcohol, overwork). Internal reliability was acceptable to good. The IPQ-A was able to detect differences in perceptions between healthcare professionals from different cultural and educational background and level of training. Conclusions The IPQ-A is a valid and reliable instrument to assess healthcare professionals’ perceptions of addiction.
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Affiliation(s)
- Astri Parawita Ayu
- Department of Psychiatry, School of Medicine, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia.,Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands
| | - Boukje Dijkstra
- Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands
| | | | - Cor De Jong
- Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands
| | - Arnt Schellekens
- Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands.,Department of Psychiatry, Radboud University Medical Centre, Nijmegen, the Netherlands
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Arat S, Van den Zegel A, Van Rillaer M, Moons P, Vandenberghe J, De Langhe E, Westhovens R. Development and preliminary evaluation of the validity and reliability of a revised illness perception questionnaire for healthcare professionals. BMC Nurs 2016; 15:34. [PMID: 27252595 PMCID: PMC4888540 DOI: 10.1186/s12912-016-0156-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 05/23/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Diverging perceptions between individual patients with somatic diseases and their healthcare professionals might cause problems in communication and decision-making. To date, no measurement tool is available to compare the illness perceptions between these two groups. The Revised Illness Perception Questionnaire (IPQ-R) is a validated, widely used instrument in many patient populations with somatic conditions. The aim of this study was to adapt the IPQ-R to a healthcare professional's version (IPQ-R HP) and to perform a preliminary evaluation of its validity and reliability. METHODS After adaptation of the IPQ-R HP, 17 doctors from 3 general hospitals and 9 head nurses from a university hospital evaluated the face and content validity of the IPQ-R HP. The results were quantified using the content validity index (CVI) and a modified kappa index (k*). For the reliability measurements a group of nurses from 4 nursing wards participated at 2 time points with an interval of 4 weeks. Internal consistency and test-retest reliability were calculated. RESULTS Twenty-eight of the 38 items demonstrated excellent content validity and four items showed good content validity. Four items had a sufficient k* and two items had a low CVI. The average CVI of the 7 dimensions ranged from 0.66 to 0.89. The Cronbach's alpha scores for the seven dimensions, intraclass coefficients and effect size estimates were acceptable. CONCLUSIONS This preliminary evaluation of the IPQ-R HP shows an acceptable to good validity and reliability. Further exploration of the psychometric properties of this questionnaire in a large cohort of healthcare professionals is warranted.
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Affiliation(s)
- Seher Arat
- Department of Development and Regeneration, Skeletal Biology and Engineering Research Centre, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | | | | | - Philip Moons
- Department of Public Health and Primary Care, KU Leuven, Kapucijnenvoer 35, Box 7001, 3000 Leuven, Belgium ; Institute of Health and Care Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Joris Vandenberghe
- Department of Psychiatry, Liaisonpsychiatry, University Hospitals Leuven, Herestraat 49, 3000 Leuven, Belgium ; Department of Neurosciences, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Ellen De Langhe
- Department of Development and Regeneration, Skeletal Biology and Engineering Research Centre, KU Leuven, Herestraat 49, 3000 Leuven, Belgium ; Department of Rheumatology, University Hospitals Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - René Westhovens
- Department of Development and Regeneration, Skeletal Biology and Engineering Research Centre, KU Leuven, Herestraat 49, 3000 Leuven, Belgium ; Department of Rheumatology, University Hospitals Leuven, Herestraat 49, 3000 Leuven, Belgium
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McCorry NK, Scullion L, McMurray CM, Houghton R, Dempster M. Content validity of the illness perceptions questionnaire – revised among people with type 2 diabetes: A think-aloud study. Psychol Health 2013; 28:675-85. [DOI: 10.1080/08870446.2012.746690] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Pertl MM, Hevey D, Donohoe G, Collier S. Assessing patients' beliefs about their cancer-related fatigue: validation of an adapted version of the Illness Perception Questionnaire. J Clin Psychol Med Settings 2013; 19:293-307. [PMID: 22476942 DOI: 10.1007/s10880-012-9298-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cancer-related fatigue (CRF) is a common and distressing side-effect of cancer treatment. The present study developed a brief version of the Illness Perception Questionnaire (IPQ) for assessing patients' representations of CRF. Cancer patients and survivors (n = 155) completed a revised version of the IPQ as well as measures of fatigue severity at two different time-points. Confirmatory factor analysis at both Time 1 and 2 showed that the seven-factor solution based on the Self-Regulation Model fit the data adequately and factorial invariance over the two time-points was supported. The resulting subscales exhibited good internal consistency and test-retest reliability. The adapted version of the IPQ shows promise for the assessment of patient perceptions regarding CRF. The scale may be able to be used clinically to identify if patients have inaccurate or unhelpful representations of CRF and to help tailor interventions for persistent fatigue in cancer survivors.
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Affiliation(s)
- Maria Margareta Pertl
- School of Psychology, Aras An Phiarsaigh, Trinity College Dublin, Dublin 2, Ireland.
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Cavelti M, Contin G, Beck EM, Kvrgic S, Kossowsky J, Stieglitz RD, Vauth R. Validation of the Illness Perception Questionnaire for Schizophrenia in a German-speaking sample of outpatients with chronic schizophrenia. Psychopathology 2012; 45:259-69. [PMID: 22653383 DOI: 10.1159/000330262] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Accepted: 06/17/2011] [Indexed: 11/19/2022]
Abstract
BACKGROUND Because the mere definition of insight from the therapist's viewpoint may not be sufficient to identify treatment targets for adherence enhancement, we need assessment strategies which are more sensitive to the patient's perspective. Illness perception (IP), defined as the beliefs a patient holds about his/her health problems, has been shown to affect coping in the context of a physical or mental illness, e.g. compliance behaviour. To assess IP in people diagnosed with schizophrenia, the Illness Perception Questionnaire for Schizophrenia (IPQS) was developed. The aim of the present study was to analyse the psychometric properties of the German version of the IPQS. SAMPLING AND METHODS The study sample consisted of 128 German-speaking outpatients suffering from chronic schizophrenia or schizoaffective disorder. To achieve comparability with the validation of the English scale version, the same constructs were assessed: psychopathology, depression, and beliefs about medication. Furthermore, insight into one's illness was assessed. Internal consistency, test-retest reliability and construct validity including convergent and discriminant validity were analysed. RESULTS Five of eight IPQS subscales were found to be internally reliable and all subscales demonstrated high stability over time. Correlations with validity measures indicated that the subscales assess dimensions of a construct, which is distinct from psychopathology, depression, beliefs about medication and insight, except for the Identity subscale which substantially overlapped with measures of insight. CONCLUSIONS The German version of the IPQS is an essentially reliable and valid measure of IP for German-speaking people with a schizophrenia spectrum disorder. This may encourage its usage in further studies investigating the impact of subjective beliefs about mental health problems on outcome and recovery in schizophrenia.
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Affiliation(s)
- Marialuisa Cavelti
- Department of Psychiatric Outpatient Treatment, Psychiatric University Hospital of Basel, Basel, Switzerland
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Dempster M, McCorry NK. The factor structure of the revised Illness Perception Questionnaire in a population of oesophageal cancer survivors. Psychooncology 2011; 21:524-30. [DOI: 10.1002/pon.1927] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 01/05/2011] [Accepted: 01/08/2011] [Indexed: 11/09/2022]
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