e LoriCorps Immersive Body Rating Scale and e LoriCorps Mobile Versions: Validation to Assess Body Image Disturbances from Allocentric and Egocentric Perspectives in a Nonclinical Sample of Adolescents.

A growing number of studies have used virtual reality (VR) for the assessment and treatment of body image disturbances (BIDs). This study, conducted in a community sample of adolescents, documents the convergent and discriminant validity between (a) the traditional paper-based Figure Rating Scale (paper-based FRS), (b) the VR-based Body Rating Scale ( e LoriCorps-IBRS 1.1), and (c) the mobile app-based Body Rating Scale ( e LoriCorps-IBRS 1.1-Mobile). A total of 93 adolescents (14 to 18 years old) participated in the study. Body dissatisfaction and body distortion were assessed through the paper-based FRS, the e LoriCorps-IBRS 1.1 and the e LoriCorps-IBRS 1.1-Mobile. Eating disorder symptoms, body image avoidance, and social physique anxiety were also measured. Correlation analyses were performed. Overall, the results showed a good and statistically significant convergence between allocentric perspectives as measured by the paper-based FRS, the e LoriCorps-IBRS 1.1 and the e LoriCorps-IBRS 1.1-Mobile. As expected, the egocentric perspective measured in VR produced different results from the allocentric perspective, and from cognitive-attitudinal-affective dimensions of BIDs, with the exception of body distortion. These differences support the discriminant validity of the egocentric perspective of e LoriCorps-IBRS 1.1 and are consistent with emerging evidence, highlighting a difference between experiencing the body from an egocentric (i.e., the body as a subject) and allocentric (i.e., the body as an object) perspective. The egocentric perspective could reflect a perceptual-sensory-affective construction of BIDs, whereas allocentric measures seem to be more related to a cognitive-affective-attitudinal construction of BIDs. Moreover, the results support the validity of the e LoriCorps-IBRS 1.1-Mobile with promising perspectives of implementation among young populations.