Cultural and Gender

In the gender sex difference the probability of genetically based differences between the quality of male and female memory remains unknown, the results suggest that females currently hold the advantage in episodic memory. That is because in future experiments women have a better developed sense that give them advantages from men."Dreams are private, so the only way someone else would know about it is if you talked to them about it," he says, "so it's an interesting test of the social interaction model." The researchers found that, as they had hypothesized, Caucasians' average age for their first remembered dream was almost one year younger than that of Asians--5.6 years old compared with 6.4 years."

http://www.apa.org/monitor/sep05/culture.aspx
http://www.sciencedaily.com/releases/2008/02/080220104244.htm