For each one of three image sets, there were three experimental sessions: eyes discrimination session with invisible face images, awareness invisibility test of discriminating invisible face images, and eyes discrimination session with visible face images.
Awareness test sessions were very similar to the eyes discrimination sessions; the only difference was that participants had to discriminate between invisible faces ('1': same faces, '2': different faces); since the participants admitted seeing nothing, they were encouraged to guess.
For each of the two image sets (intact and shifted eyes), there were five experimental sessions: two sessions with invisible face images, where eyes had to be discriminated (one before and one after learning), two awareness invisibility tests of discriminating invisible face images (one before and one after learning), and an eyes discrimination session with visible face images.
More interestingly, the fluorescent nanofiber mat was fabricated by electron spinning of FPEN solution, which exhibited naked-eye discrimination of 10 μM Hg2+ aqueous solution after adsorption of Au NCs.
Over months, many people gave their time to provide her with insight into the diverse experiences of New York's sex trade and the "stink-eye" discrimination those working in it face.
The awareness invisibility tests always followed the eyes discrimination sessions with invisible face images.
The eyes discrimination session with visible face images was always the last session of the experiment.
In the eyes discrimination experiment, participants had to press '1' if the two pairs of eyes were the same and '2' if the two pairs were different.
At the beginning of the experiment, before the first session with invisible face images, participants underwent a short training session (10 trials) of eyes discrimination with invisible faces.
Participants were told that this eyes discrimination task was very difficult, and were encouraged to look out for the smallest differences between the two stimuli.
To minimize the number of switches between tasks, participants first performed three sessions of eyes discrimination with invisible face images (all three image sets), then three sessions of awareness invisibility (all three image sets; explained below), and finally three sessions of eyes discrimination with visible face images (all three image sets).
