Several reports of visits to the Institute made in 1966 give no name to the system, (Bobath, K.; Bobath, B.) but do mention ‘conductors’, (Parnwell; Seglow), ‘the Budapest method’ and ‘Pető’s training method’ (Parnwell). Seglow did report that ‘Pető regards his education as a conditioning process’. In 1967, Ester Cotton published an article in Nursery World which used the term ‘Conductive Education’ and another article with Margaret Parnwell in Special Education which mentioned the ‘State Institute for Conductive Education of the Motor Disabled’. These were both published after the death of Pető in the September of that year. In 1968 James House, an American professor who visited the Institute, talked only of ‘conductors’ and ‘the Budapest method’ in an interview, not ‘Conductive Education’ (Maas, 1968). In 1971, James Loring, head of the Spastics Society (UK) reported on a visit with no mention of ‘Conductive Education’.
James House went on to initiate a research project at Wisconsin University reported by Laird Heal in 1972 also referred to ‘Conductive Education’. From this time ‘Conductive Education’ seems to have become the term of choice in material held in this library and not other phrases, until the 1980s onwards, when ‘conductive therapy’ and ‘Pető therapy’ started appearing.
This is the result of a very limited and fairly quick search of the items in English held in the library. Searching in other languages may produce different results and further investigation would make an interesting research project for someone.
Other reports, articles, papers etc not held here may shed further light on the subject, so if you know of, or have any information please let me know!