While admittedly this 
statement is open to different 
interpretations, I take it to 
mean that the scene had by 
this time righted itself—–that 
is, appeared as an upright 
world. But the orientation of its 
image on the retina, upright 
rather than inverted as it 
ordinarily is, continued to 
yield an impression of 
egocentric inversion. It simply 
did not look upright in relation 
to Stratton himself. The 
solution to these two facts had 
to be that he himself somehow 
must be viewing an upright 
world from an inverted 
position. I am here suggesting a 
different explanation of 
Stratton’s peculiar experiences 
from the one suggested by 
Harris.

    The critical test is what 
happened when the tube was 
removed. Had the scene viewed 
through the tube come to look 
upright, we should expect that 
the scene viewed without the 
tube should look inverted 
(being an example of a negative 
aftereffect), but it did not. Yet 
other negative aftereffects did 
occur, including Stratton’s 
impression that the scene 
moved rapidly whenever he 
moved his head. Thus, 
adaptation to the lens-induced 
"swinging of the scene" 
occurred during the 
experiment, as noted in 
Chapter 7, but not egocentric 
adaptation.