Test-retest reliability of the STRAQ-1: A registered report

This Registered Report provides the first test of measurement invariance across time points and estimates of test-retest reliability for the Social Thermoregulation, Risk Avoidance Questionnaire (STRAQ-1, Vergara et al., 2019). The scale was developed and validated to understand the physiological drives underlying interpersonal bonding, measured by four constructs: the desire to socially regulate one's temperature, the desire to solitary regulate one's temperature, the sensitivity to higher temperatures, and the desire to avoid risk. Previous studies with large samples across 12 countries showed that the STRAQ-1 has a stable factorial structure, satisfying internal consistencies for the temperature subscales, and expected correlations in its nomological network. However, to date, this instrument has no estimates of test-retest reliability. Throughout four academic years (from 2018 to 2022), N = 183 French student participants took the STRAQ-1 at least two times. Out of the four STRAQ-1 subscales, four were longitudinally non-invariant across two-time points. The constructs and latent scores were thus dissimilar and incomparable across time. We then conducted test-retest reliability using Intra Class Correlation coefficient (ICC) for the Social Thermoregulation, Solitary Thermoregulation, High-Temperature Sensitivity, and Risk Avoidance subscales. ICCs estimates were respectively for agreement and consistency: .70, .70 overall moderate to good, .62, .62 overall moderate, .67, .67 overall moderate, and .53, .53 overall poor to moderate, respectively. We discuss our findings in regard to the relatively long time between the repeated measures.Keywords: Test-Retest, Longitudinal Measurement Invariance, Attachment Theory, Social Thermoregulation, Registered Report