One of the more influential experimental paradigms in sensory neuroscience is the coherent random dots task in which small dots flicker in and out of existence, with some small number of them moving either left or right, like flecks of snow on a windy winter day. An animal – a monkey, a mouse, a human – is forced to say in which direction these dots are moving, a task which gets harder as the number moving in a coherent direction gets smaller. You can see an example here (which is uploaded in quicktime for some reason). Versions of this task have been adapted to other sensations like audition.
I was in Seoul recently and visited the Seoul Museum of Art. Filled to the brim with amazing installations, one caught my eye. Much to the chagrin of my non-neuroscientist companions, I became entranced by a vivid representation of these seminal psychophysics studies. Norimichi Hirakawa, consciously or not, has manifested this ‘random noise’ into a form that is somehow accessible to a broad audience. Think of the possibilities inherent in that the next time that you run an experiment.
(I took some videos but could not find a good way to embed them as youtube and vimeo both attempt to lossily compress it – which is difficult when you are literally compressing noise.)