The paper deals with the issues concerning specific influence of bilingual communicative parameters on the development of early childhood bilingualism observed in the context of simultaneous acquisition of Russian and English by children from several Russian families living in Russia. The author analyzes interrelation between principles of bilingual upbringing chosen by parents (a personal principle “one parent – one language”, a place-oriented principle “one place – one language”, a time-oriented principle, a message-oriented principle, “occasional listener’-oriented principle) and specific behavior of a bilingual child in various monolingual or bilingual communicative situations. It is shown how such parameters as interlocutors, place, time, code (codes) of communication, as well as the presence or absence of occasional listeners stimulate a bilingual child’s choice of his/her communicative strategies. The attention is also paid to the ways the child’s parents perceive and correct his/her strategies. The author shows, that each parameter of a communicative situation can stimulate such bilingual processes as interference and code-switching.