Psychologists from the Psychotherapy Research Project of the Menninger Foundation have tried to reduce the difficulty of identifying, in test protocols, repression which does not pervade ego functioning. Examples from Rorschach tests illustrate two necessary components which together indicate the presence of repression: 1, the absence of something (i.e. a common or expected response does not appear) and 2, the presence of some other defense activity 'to surround the void' or support the act of repression.