[2][3] Tweedie was born in Christchurch in 1953 and attended Rangi Ruru Girls' School.
[5][6] In 1992 Tweedie joined seven other artists (Kirsty Cameron, Judy Darragh, Gail Haffern, Giovanni Intra, Denise Kum, Lucy Macdonald and Daniel Malone) to open an artist-owned exhibition space in Vulcan Lane, Auckland, known as Teststrip, which ran until 1997.
[2][8][9][5] The installation, the fundamental practice, used sound, computers and mechanical devices and was designed to question the way people consume information and the media power structures of our societies.
[8] The selection of et al. to represent New Zealand was met with some controversy in the country as misinformation regarding the artist's identity, income and the use of public money was circulated in the media.
[9] However the installation was met with praise from international art critics and reviewers.