Apparently ink blots assess academic, intellectual, social, and emotional development. Diagnose various intellectual, perceptual, learning, behavioural, developmental, emotional, or personality disorders. Determine social-emotional development, aptitude for learning and effective learning environments. Not bad going for a humble ink blot!!
So what do you see?
3. Your brain will try and figure it out, despite the fact it doesn't actually represent anything. Its a subconscious effort. Hence these are not used so much any more you will be pleased to hear, so you wont be carted away!