Does "than is warranted" mean "than one deserves"?

Does "than is warranted" mean "than one deserves" (you should not have so much confidence because you deceive)?

Context:

Abstract: In this article we argue that self-deception evolved to facilitate interpersonal deception by allowing people to avoid the cues
to conscious deception that might reveal deceptive intent. Self-deception has two additional advantages: It eliminates the costly
cognitive load that is typically associated with deceiving, and it can minimize retribution if the deception is discovered. Beyond its
role in specific acts of deception, self-deceptive self-enhancement also allows people to display more confidence than is warranted,
which has a host of social advantages. The question then arises of how the self can be both deceiver and deceived. We propose that
this is achieved through dissociations of mental processes, including conscious versus unconscious memories, conscious versus
unconscious attitudes, and automatic versus controlled processes. Given the variety of methods for deceiving others, it should come
as no surprise that self-deception manifests itself in a number of different psychological processes, and we discuss various types of
self-deception. We then discuss the interpersonal versus intrapersonal nature of self-deception before considering the levels of
consciousness at which the self can be deceived. Finally, we contrast our evolutionary approach to self-deception with current
theories and debates in psychology and consider some of the costs associated with self-deception.
Keywords: deception; evolutionary psychology; motivated cognition; self-deception; social psychology

More:
http://homepage.psy.utexas.edu/HomePage/Faculty/Swann/docu/brooks-swann.pdf