PHONETICS: Mispronunciations or speech errors can be divided into different types.
1 anticipations: 'a leading list' (for 'a reading list')
2 perseverations: 'at the beginning of the burn' (for 'at the beginning of the turn')
3 reversals or spoonerisms: 'heft lemisphere' (for 'left hemisphere')
(Examples are taken from V.A. Fromkin, 'Slips of the tongue', Scientific American 229, 1973, 114.)