Ungram: 63.5     Gram: 54.0 
2.410165          2.495108 

Low-int: 60.0    Hi-int: 57.5 
    2.452557     2.474810 


gram        -0.20966    0.07314  -2.866 0.004151 ** 
int         -0.05828    0.07312  -0.797 0.425458    
gram:int     0.10133    0.07313   1.385 0.165907    


V1:
gram         0.07025    0.01927    3.64 0.53805 0.59466
int         -0.01687    0.01927   -0.88
gxi         -0.03359    0.01927   -1.74
Post-V1:
gram         0.04529    0.01629    2.78 0.37795 0.424670
int         -0.01469    0.01632   -0.90
gxi         -0.02291    0.01630   -1.41


gram         0.07025    0.01927    3.64 0.53805 0.59466
gram         0.04529    0.01629    2.78 0.37795 0.42467