The manual gives little information on autoRange. I image brain injured subjects on simple FMRI tasks and activation is generally diffuse and extensive compared to controls. When I turn off autorange and choose a range of '10' for the color scaling the data become harder to interpret. The autoRange function activation data is appealing because when I chose a standard p-value used for controls, the data is easier to interprete because activation is more discrete.

I need to know how autoRange functions given the larger range of activation in my patients and if it is appropriate to use given the diffuse activation.