The text plays on the double meaning of 'crackpots'. In one sense, 'crackpots' refers to eccentric or crazy people, while in another sense, it can literally refer to ceramic pots that are cracked. The term 'psychoceramics' humorously suggests a fake scientific study of such people by combining 'psycho-' (relating to the mind) and 'ceramics' (relating to pottery).
Psychoceramics : The study of crackpots .