Based upon a detailed analysis of a psychological assessment (WAIS, Rorschach, TAT) of a 25 years old man, evasive and feeling ill at ease during the clinical situation, the author illustrates some of the negative symptoms of the schizophrenia, especially the attack of the thoughts and the attack of the links to the objects. Those symptoms can be so discreet sometimes that family and colleagues can miss them. Moreover, a hostile indifference towards circle can break the relationships. Sometimes, as for this young man, some isolated investment can remain, linked to mechanic, operatory centres of interest. The psychological assessment leads to spot the psychic fragilities and resources.