The Beatles recorded "Think for Yourself" in November 1965, towards the end of the sessions for "Rubber Soul". In a departure from convention, the track includes two bass guitar parts – one standard and one played through a . Performed by McCartney, this fuzz bass serves as a lead guitar line throughout the song and marked the first time that a bass guitar had been recorded using a fuzzbox device, as opposed to manipulating equipment to achieve a distorted sound. The group overdubbed their harmony vocals during a lighthearted session that was also intended to provide material for their 1965 fan-club Christmas disc. A snippet from this session was used in the Beatles' 1968 animated film "Yellow Submarine". The song has also appeared on the 1976 compilation "The Best of George Harrison" and on the 1999 "Yellow Submarine Songtrack" album.