title: A virtual environment for egocentric and allocentric mental transformations: a study on a nonclinical population of adults with distinct levels of schizotypy.
abstract: We benefited from the flexibility provided by virtual reality to enhance a classical paradigm on array and self mental rotations and related questions on a set of items. We used this paradigm to investigate how the Level of Schizotypy in nonclinical subjects might influence their behavior in egocentric and allocentric mental transformations. Three elements of novelty were introduced: (i) we separated the phases of mental transformation (Imagined Rotation Phase) and task performance (Task Phase), (ii) we measured the time required for Imagined Rotation Phase and Task Phase separately, and (iii) we cued self-rotations with a virtual human being (self-avatar) or an inanimate object (self-chair). Twenty-four nonclinical participants were categorized in low- and high-schizotypal subjects (Low-S, High-S). A mixed-design analysis of variance showed that High-S were significantly faster than Low-S during the Imagined Rotation Phase (array and self-chair rotations) and during the Task Phase (self-chair). High-S were also faster in the self-chair than in the self-avatar rotation, supporting the existence of a dissociation between perspective changing and perspective taking in High-S. In line with the literature, we found that participant performances decreased with increasing angular difference between the initial and the imagined perspective.
authors: BIND--Behavioral Imaging and Neural Dynamics Center, University "G. d'Annunzio", Chieti, Italy. m.steinisch@unich.it
authors: Martin
authors: M
authors: Steinisch
authors: Valentina
authors: V
authors: Sulpizio
authors: Angelo Andrea
authors: AA
authors: Iorio
authors: Alessandra
authors: A
authors: Di Naccio
authors: Jens
authors: J
authors: Haueisen
authors: Giorgia
authors: G
authors: Committeri
authors: Silvia
authors: S
authors: Comani
mesh_terms: D000328:Adult; D004777:Environment; D005260:Female; D006801:Humans; D007092:Imagination; D008297:Male; D010364:Pattern Recognition, Visual; D011581:Psychological Tests; D012569:Schizotypal Personality Disorder / Q000175:diagnosis* / Q000503:physiopathology* / Q000523:psychology; D013028:Space Perception; D014584:User-Computer Interface