Cool results. Just want to point out that there's a time lag between "thoughts" and the appearance of a signal through fMRI, which explains why the image needed to be imagined for a long period of time (8 seconds).

Most thoughts are more fleeting than this, and couldn't be read with fMRI. So there's no need to get /too/ concerned about the privacy of our thoughts. Not yet :)

> Each imagery block consisted of a 4-s cue period, an 8-s imagery period, a 3-s evaluation period and a 1-s rest period.