A chronic shortage of Tasmanian school psychologists means students are not getting help soon enough, according to parent groups.

The Tasmanian Association of State School Organisations is worried students with learning difficulties and emotional problems are waiting up to a year to see a school psychologist.

The organisation welcomed extra funding for psychologists in schools which was announced as part of the State Government's new family violence package.

But president Jenny Eddington said there was only one psychologist for as many as 1,000 children in Tasmania, while in other states the ratio was more like one for every 500 kids.

"Because there's such a waiting list, the problems are actually escalating before they are receiving support where an earlier intervention may have been much more beneficial," she said.

Ms Eddington feared children with learning difficulties or emotional disorders were slipping through the cracks.

"Some children are waiting the best part of a year sometimes to get assessment," she said.

The issue will be raised at the organisation's annual conference in Hobart today.