Psychiatry and Clinical Psychopharmacology
Original Article

Reliability, validity, and factorial structure of the Turkish version of the Luebeck questionnaire for recording preoperational thinking (Turkish LQPT)


Department of Psychology, Uskudar University, Istanbul, Turkey


Department of Psychology, Hasan Kalyoncu University, Gaziantep, Turkey


H. Kalyoncu University, Department of Psychology, Gaziantep - Turkey


University of Texas Medical School of Houston, TX, USA and Center for Neurobehavioral Research on Addictions, Houston, TX, USA

Psychiatry and Clinical Psychopharmacology 2018; 28: 191-198
DOI: 10.1080/24750573.2017.1411575
Read: 807 Downloads: 477 Published: 09 February 2021

OBJECTIVE: The objective of the current study is to establish the psychometric properties and factorial validity of the Turkish version of the Luebeck Questionnaire for Recording Preoperational Thinking (LQPT) in a Turkish sample.

METHODS: The study was conducted in Istanbul Metropolitan area and comprised of healthy controls (n = 33) and patients with psychiatric diagnoses (n = 60). Socio-demographic data of the participants were collected and the Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I), the Dysfunctional Attitude Scale (DAS-A), and the LQPT were administered.

RESULTS: The mean age of the study participants was 30.51 ± 8.75; 64.5% (n = 60) of the participants were female; 35.5% (n = 33) were male. The LQPT scores were non-normally distributed. The Cronbach’s alpha for the LQPT scale was found 0.887 and the split-half reliability coefficient was 0.902. The inter-item correlation was ranging from 0.189 to 0.705. A negative and statistically significant correlation was found between the Turkish LQPT and the DAS-A and its subscales. The principal-components analysis with Promax rotated solution yielded two factors which accounted for 46.43% of the total variance.

CONCLUSIONS: Our results suggested that Turkish LQPT was a valid and reliable instrument with a robust factorial structure for tapping the cognitive components associated with the development of depression in clinical psychiatric populations in Turkey

EISSN 2475-0581