Oman York Conference(2001 in press)11/2/01 discovered that one the signs had been misplaced probably as a result of a visual reorientation illusion. Improved egress signs are in development, and"you are here"maps, inflight practice, and preflight virtual reality based spatial memory training are under consideration 3. A model for human visual orientation Based on prior research on human visual orientation in 1-G(reviewed by Howard, 1982), and synthesizing more recent theories and experiments of Mittelstaedt(1983, 1988), Young, et al (1986), Oman(1986), Oman et al (1986), and Howard and Childerson(1993), the following heuristic model for static orientation perception emerges 3.1 Beginning with a 1-G model On Earth in 1-G, the direction of the subjective vertical (sv) is the nonlinear sum of three ectors G, the gravitational stimulus to the otoliths, cardiovascular, and kidney gravireceptors B, a net gravireceptor bias acting in the direction of the bodys major axis. The magnitude and headward vs footward direction is presumed to be an individual characteristic V. the tual visual vertical. is normally determined by F,frame"(architectural symmetry) visual cues, disambiguated by P,polarity"cues, associated with the recognition of top/bottom of familiar objects in view, and the visual vertical as oriented along the body axis in a footward direction Note that as is the convention in eering and physics, the defining the gravitational"vertical Floor= Subject SV depicted pointing"down", as are the Figure 5. Model for 1-G"Tilted Room" illusionOman York Conference (2001 in press) 11/2/01 Page 7 discovered that one the signs had been misplaced, probably as a result of a visual reorientation illusion. Improved egress signs are in development, and “you are here” maps, inflight practice, and preflight virtual reality based spatial memory training are under consideration. 3. A model for human visual orientation Based on prior research on human visual orientation in 1-G (reviewed by Howard, 1982), and synthesizing more recent theories and experiments of Mittelstaedt (1983, 1988), Young, et al (1986), Oman (1986), Oman et al (1986), and Howard and Childerson (1993), the following heuristic model for static orientation perception emerges: 3.1 Beginning with a 1-G Model: On Earth in 1-G, the direction of the subjective vertical (SV) is the nonlinear sum of three vectors: G, the gravitational stimulus to the otoliths, cardiovascular, and kidney gravireceptors. B, a net gravireceptor bias acting in the direction of the body’s major axis. The magnitude and headward vs. footward direction is presumed to be an individual characteristic. V, the perceptual visual vertical, is normally determined by: F, “frame” (architectural symmetry) visual cues, disambiguated by P, “polarity” cues, associated with the recognition of top/bottom of familiar objects in view, and M, an “idiotropic” tendency to perceive the visual vertical as oriented along the body axis in a footward direction. Note that as is the convention in engineering and physics, the G vector defining the gravitational “vertical” is depicted pointing “down”, as are the Figure 5. Model for 1-G “Tilted Room” illusion