Testing previously proposed models of the Tonic Immobility Scale in a peritraumatic sample of Israeli civilians: Support for a three-factor model.

OBJECTIVE: Tonic immobility (TI) is a peritraumatic response to extreme threats. It is associated with trauma psychopathology and poor treatment outcomes. Yet, previous psychometric evaluations have yielded inconsistent results regarding the number of latent factors of the Tonic Immobility Scale (TIS). Moreover, the TIS has never been validated in a Hebrew-speaking population. This study had two objectives: (a) to reassess previously proposed models of the TIS to determine whether it is best represented by a one-factor model of TI, a two-factor model of TI and fear, or a three-factor model of TI, fear, and detachment; and (b) to validate the TIS in a Hebrew translation. METHOD: A sample of Israeli adults was culled from an online survey following rocket attacks. Confirmatory factor analysis was applied to test the previously proposed models, and Pearson's correlations were used to test the association between each of the subscales representing the latent factors and psychological distress. RESULTS: The best representation of the data was provided by a three-factor model with latent constructs of TI, fear, and detachment. All three peritraumatic responses had significant correlations with peritraumatic distress. Moreover, the internal consistency of the TIS was good for the three subscales; this supports the reliability of the Hebrew version. CONCLUSION: This study supports using a three-factor model with latent constructs, and the scale appears to be psychometrically sound when translated into Hebrew. Future research should seek to replicate these findings in different trauma populations and should study the unique association of trauma symptomatology. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Sensory modulation and trauma-related symptoms during rocket attacks.

BACKGROUND: War is a highly traumatogenic experience that may result in trauma-related symptoms during exposure. Although most individuals exhibit recovery after the trauma ends, symptomatology during exposure may serve as an initial indicator underlying symptomatology at the posttraumatic phase, hence the imperative to identify risk factors for trauma-related symptoms during the peritraumatic phase. While research has uncovered several factors associated with peritraumatic distress, such as age, gender, history of mental disorder, perceived threat, and perceived social support, the role of sensory modulation has not been explored. METHOD: To address this gap, 488 Israeli citizens were assessed using an online survey for sensory modulation and trauma-related symptoms during rocket attacks. RESULTS: Analyses revealed that while the association between high sensory responsiveness and elevated levels of specific trauma-related symptoms is somewhat weak (0.19

High sensory responsiveness was related to trauma-related symptoms.Low sensory responsiveness was unrelated to trauma-related symptoms.The risk for elevated trauma-related symptoms during exposure was doubled for each increase in high sensory-responsiveness score.