Full Betazoids are unable to read the minds of Ferengi, Breen, Ullians or Dopterians due to their unusual brain lobe formations, but some half Betazoids have been occasionally successful in sensing the emotions of these species. Society Betazoid society tends toward more formal and elaborate traditions and ceremonies than most cultures in their present evolutionary stage. Some of the rites often make the more conservative Federation offworlder uneasy at first, most notably the traditional wedding ceremony in which no clothing is to be worn. Though there are no official gender-based restrictions in place within Betazoid society, women have traditionally held many positions of authority.
Betazoids are a race of pacific philosophers who are more likely to observe than act, and consequently have little use for weapons or even defense systems. Their planetary defense system were outdated the moment they were finally in place and proved to be quite useless with the Dominion . Nonetheless they are considered a major world of the Federation and their fall during the Dominion war in 2374 struck home the devastation that had eaten away at the Federation's formerly secure borders.
The Betazoid brain contains the paracortex, which is a lobe devoted specifically to telepathy. While most Betazoids develop their telepathic powers at the onset of adolescence, and they gradually develop after that, a small number are born fully telepathic, although no one knows exactly why. Betazoids born with their telepathic abilities fully developed almost never lead normal lives - they are constantly bombarded with the thoughts of others around them, and drive themselves to distraction attempting to block out the never-ending telepathic "attack". The opposite, Betazoids can be born without any telepathic ability, leading to sociopathic behavior.
Even if we are very similar physically, the REM frequency of sleeping Betazoids is different from that of most humanoids. The gestation period for Betazoids is typically 10 months and at around age 40, Betazoid females enter a period of increased sexual desire called "the phase". A Betazoid woman's sex drive will typically quadruple in intensity during the phase.