The research showed that 90 per cent of those surveyed thought the profession had become "quite a lot more" to "very much more" stressful in the past five years.
Fourteen per cent - made up of 18 class teachers and 40 middle managers - reported particularly high levels of stress that might need therapeutic intervention.
Indiscipline was seen as the main source of stress; 62 per cent of teachers said this was a chief cause. More than half the respondents also blamed an excess of paperwork and lack of time.
The research, based on a survey of 407 teachers in 18 schools, was presented by Edinburgh Univer-sity's Rosie Mulholland at the annual conference of the Scottish Educational Research Association. But she cautioned that the results were based on self-reporting, and that the survey took place in April 2003, a particularly pressured time in the school year. In addition, all who took part chose to do so; the teachers surveyed represented a 68 per cent response rate.