The aim of this study was to assess how intelligence factors influence the ability of subjects to show themselves in socially desirable manner while being assessed by some psychological instruments.

The sample consisted of 80 subjects (40 non-psychotic patients and 40 graduate high school students) to whom the test Amoral 15 (measuring antisocial tendencies within three general factors of amorality: amorality which rise from impulsivity, frustrations and brutality) was administered in two different situation - with the standard instruction (E1) and with the instruction to fake(E2). The (El-E2) difference is taken as an objective measure of ability to fake good. For measuring intelligence we administreted Ravens Matricess.

Results showed that not all of the subjects are able to present themselves in socially desirable manner even when they are told to do so. Namely, 25% of subjects worsened their result while 50% of them showed the same result which they reached under the standard instruction (E1). Another 25% subjects improved their results but not in the way which can jeopardize tha rank of subjects who are at the bottom on the Amoral-15 scale. The results showed that there is no significant Pirson's correlation between showing in socially desirable manner and inteligence which means that intelligence does not influence the ability of subjects to estimate what tests are actualy measuring.

Further research is needed, particularly the impact of personality dimensions related.