Psychometric properties of the Persian version of the Reinforcement Sensitivity Theory Personality Questionnaire (RST-PQ)

BACKGROUND

The Reinforcement Sensitivity Theory of Personality Questionnaire (RST-PQ) originated from the Revised Reinforcement Sensitivity Theory of Personality. This study was conducted to assess the psychometric properties of the Persian version of the RST-PQ among a group of Iranian adults.

METHOD

The cross-sectional study was carried out among 600 Iranian adults utilizing a convenient sampling method, following specific participant selection criteria to enhance the study methodology's transparency (including the age range between 18 and 35 years' participants without major psychiatric diagnoses). Participants completed both the Iranian version of the Reinforcement Sensitivity Theory Personality Questionnaire (RST-PQ) and the Five-Factor NEO-FFI questionnaire. Confirmatory factor analysis, employing the multiple indicators model (MIMIC) approach, was utilized in this study to control for demographic variables such as age and gender.

RESULTS

The confirmatory factor analysis results showed an acceptable fit of the proposed six-factor model based on the English version of RST-PQ (CFI = 0.905; RMSEA = 0.053). Also, Cronbach's alpha values confirmed the internal consistency of the proposed structure. In addition, competing models were also used to select the best-proposed model. In this way, different models were evaluated, assuming a change in the correlation intensity between BIS and the Fight-Flight-Freeze System (FFFS).

CONCLUSIONS

The convergent validity results with the Five-Factor Personality measure provided further support and were consistent with previous research findings. It is crucial to have an Iranian-language version of the RST-PQ to promote RST research and show how this theoretical framework aids in explaining and predicting various actions, whether they are abnormal or healthy.

Evaluation of the psychometric indicators of the Comprehensive Autistic Trait Inventory in Iranian adults

BACKGROUND

The DSM-5's Comprehensive Autism Traits Inventory (CATI) was a useful diagnostic tool for the general population because it covered all the critical aspects of autism. However, its reliability and validity in the overall Iranian population still need to be investigated.

PURPOSE

We reviewed the inventory and estimated the validity and reliability of the Iranian version of CATI among 1800 adults.

METHODS

The Persian version of CATI (CATI-I) was administered to 1800 Iranian adults using the online Star Questionnaire system. Internal consistency, convergent validity, discriminant validity, test-retest reliability, and measurement invariance across genders were calculated.

RESULTS

The Correlated social & non-social bifactor model showed the best fit in the Iranian community (CFI=.966; TLI=.947; RMSEA=.045; SRMR=.028). Ultimately, the CATI-I scale in the Iranian community consisted of 39 items across six factors and two higher-order constructs. Additionally, the CATI-I scale's convergent validity and reliability values were acceptable.

CONCLUSION

The CATI-I demonstrates satisfactory reliability and validity in measuring autism traits. It is an appropriate model for the second-order social and non-social factors, and it also shows measurement invariance across genders.