Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples
Abstract Background Some individuals may manifest psychotic symptoms that do not fulfill the requisite clinical criteria for a formal diagnosis of psychosis. The assessment of susceptibility to delusions, encompassing both clinical and non-clinical cohorts, frequently makes use of the Peters et al....
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2023-09-01
|
| Series: | BMC Psychology |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40359-023-01341-w |
| _version_ | 1797555633635983360 |
|---|---|
| author | Seyed Ruhollah Hosseini Roghieh Nooripour Nikzad Ghanbari Abbas Firoozabadi Emmanuelle Peters |
| author_facet | Seyed Ruhollah Hosseini Roghieh Nooripour Nikzad Ghanbari Abbas Firoozabadi Emmanuelle Peters |
| author_sort | Seyed Ruhollah Hosseini |
| collection | DOAJ |
| description | Abstract Background Some individuals may manifest psychotic symptoms that do not fulfill the requisite clinical criteria for a formal diagnosis of psychosis. The assessment of susceptibility to delusions, encompassing both clinical and non-clinical cohorts, frequently makes use of the Peters et al. Delusions Inventory (PDI-40). This study aimed to evaluate the reliability and validity of the Persian version of Peters et al. Delusions Inventory (PDI-40) in Iranian non-clinical and clinical samples. Methods The present study employed a cross-sectional, correlational design in 2020. A total of 1402 Iranian participants were recruited for the study, which consisted of three distinct stages. The first stage involved an Exploratory Factor Analysis (EFA) conducted on a non-clinical sample of 512 participants. The second stage comprising different non-clinical sample 764 participants to perform a Confirmatory Factor Analysis (CFA). In the third stage, a clinical sample of 126 psychotic patients was compared to a non-clinical sample. All participants completed the PDI-40, the Community Assessment of Psychotic Experiences (CAPE-42), and the Depression, Anxiety, and Stress Scale (DASS-21). The internal structure of PDI-40 was examined through the analysis of its factor structure using LISREL 8.8. Results The EFA analysis unveiled nine components within Persian version of PDI-40. The CFA analysis demonstrated an excellent fit of the nine-factor structure of Persian PDI-40 to the data. The total score exhibited high internal reliability, as indicated by Cronbach’s alpha coefficient of 0.92. Moreover, Persian PDI-40 exhibited satisfactory evidence of convergent validity, as significant correlations were observed between dimensions of PDI-40 and subscales of CAPE-42 and DASS-21. Lastly, findings indicated that psychotic participants scored higher than non-clinical participants in all components of the PDI-40(p < 0.05). Conclusion Persian version of the PDI-40 demonstrates strong reliability and validity for assessing delusion proneness in both non-clinical and clinical samples in Iran. The observed distinctions between psychotic and non-clinical participants underscore its potential as a valuable tool for discerning delusion proneness in diverse contexts. |
| first_indexed | 2024-03-10T16:50:17Z |
| format | Article |
| id | doaj.art-ec4ec8960bce4dc98d9b254b6cfab043 |
| institution | Directory Open Access Journal |
| issn | 2050-7283 |
| language | English |
| last_indexed | 2024-03-10T16:50:17Z |
| publishDate | 2023-09-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Psychology |
| spelling | doaj.art-ec4ec8960bce4dc98d9b254b6cfab0432023-11-20T11:20:06ZengBMCBMC Psychology2050-72832023-09-0111111810.1186/s40359-023-01341-wEvaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samplesSeyed Ruhollah Hosseini0Roghieh Nooripour1Nikzad Ghanbari2Abbas Firoozabadi3Emmanuelle Peters4Department of Psychology, Faculty of Education Sciences and Psychology, Ferdowsi University of MashhadDepartment of Counseling, Faculty of Education and Psychology, Alzahra UniversityDepartment of Clinical Psychology, Faculty of Psychology and Educational Sciences, Shahid Beheshti UniversityDepartment of Psychology, Faculty of Education Sciences and Psychology, Ferdowsi University of MashhadDepartment of Psychology, Institute of Psychiatry, Psychology & Neuroscience, King’s College LondonAbstract Background Some individuals may manifest psychotic symptoms that do not fulfill the requisite clinical criteria for a formal diagnosis of psychosis. The assessment of susceptibility to delusions, encompassing both clinical and non-clinical cohorts, frequently makes use of the Peters et al. Delusions Inventory (PDI-40). This study aimed to evaluate the reliability and validity of the Persian version of Peters et al. Delusions Inventory (PDI-40) in Iranian non-clinical and clinical samples. Methods The present study employed a cross-sectional, correlational design in 2020. A total of 1402 Iranian participants were recruited for the study, which consisted of three distinct stages. The first stage involved an Exploratory Factor Analysis (EFA) conducted on a non-clinical sample of 512 participants. The second stage comprising different non-clinical sample 764 participants to perform a Confirmatory Factor Analysis (CFA). In the third stage, a clinical sample of 126 psychotic patients was compared to a non-clinical sample. All participants completed the PDI-40, the Community Assessment of Psychotic Experiences (CAPE-42), and the Depression, Anxiety, and Stress Scale (DASS-21). The internal structure of PDI-40 was examined through the analysis of its factor structure using LISREL 8.8. Results The EFA analysis unveiled nine components within Persian version of PDI-40. The CFA analysis demonstrated an excellent fit of the nine-factor structure of Persian PDI-40 to the data. The total score exhibited high internal reliability, as indicated by Cronbach’s alpha coefficient of 0.92. Moreover, Persian PDI-40 exhibited satisfactory evidence of convergent validity, as significant correlations were observed between dimensions of PDI-40 and subscales of CAPE-42 and DASS-21. Lastly, findings indicated that psychotic participants scored higher than non-clinical participants in all components of the PDI-40(p < 0.05). Conclusion Persian version of the PDI-40 demonstrates strong reliability and validity for assessing delusion proneness in both non-clinical and clinical samples in Iran. The observed distinctions between psychotic and non-clinical participants underscore its potential as a valuable tool for discerning delusion proneness in diverse contexts.https://doi.org/10.1186/s40359-023-01341-wDelusionPsychotic-like experiencesValidityReliability |
| spellingShingle | Seyed Ruhollah Hosseini Roghieh Nooripour Nikzad Ghanbari Abbas Firoozabadi Emmanuelle Peters Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples BMC Psychology Delusion Psychotic-like experiences Validity Reliability |
| title | Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples |
| title_full | Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples |
| title_fullStr | Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples |
| title_full_unstemmed | Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples |
| title_short | Evaluation of reliability and validity of the Persian version of Peters et al. delusions inventory (PDI-40) in iranian non-clinical and clinical samples |
| title_sort | evaluation of reliability and validity of the persian version of peters et al delusions inventory pdi 40 in iranian non clinical and clinical samples |
| topic | Delusion Psychotic-like experiences Validity Reliability |
| url | https://doi.org/10.1186/s40359-023-01341-w |
| work_keys_str_mv | AT seyedruhollahhosseini evaluationofreliabilityandvalidityofthepersianversionofpetersetaldelusionsinventorypdi40iniraniannonclinicalandclinicalsamples AT roghiehnooripour evaluationofreliabilityandvalidityofthepersianversionofpetersetaldelusionsinventorypdi40iniraniannonclinicalandclinicalsamples AT nikzadghanbari evaluationofreliabilityandvalidityofthepersianversionofpetersetaldelusionsinventorypdi40iniraniannonclinicalandclinicalsamples AT abbasfiroozabadi evaluationofreliabilityandvalidityofthepersianversionofpetersetaldelusionsinventorypdi40iniraniannonclinicalandclinicalsamples AT emmanuellepeters evaluationofreliabilityandvalidityofthepersianversionofpetersetaldelusionsinventorypdi40iniraniannonclinicalandclinicalsamples |