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This information is not held centrally. This is because most diagnoses will be made in community and outpatient settings and information services division do not hold the relevant information from those settings.

The Scottish Government expects NHS boards to provide safe, effective care and services which support and respond to the needs of the individual. This includes the recognition and treatment of attention deficit hyperactivity disorder in line with evidence-based practice.

The Scottish Government has worked with NHS Education for Scotland to produce the psychological therapies Matrix - a guide to planning and delivering evidence-based psychological therapies within NHS boards in Scotland. The ‘Matrix’ dedicates a section to attention deficit hyperactivity disorder.

An increase in the tax free personal allowance for income tax as announced by the UK Government in respect of 2017-18 will result in reduced income tax receipts for the Scottish Government. There will be a corresponding reduction in income tax receipts for the rest of the UK. This will result in a reduction in the block grant adjustment applied to the Scottish budget. The net effect of the change in tax receipts and in the block grant adjustment is expected to be zero or close to zero.

Any consideration of policy spill over effects as set out in paragraphs 44 to 53 of the fiscal framework agreement will be undertaken on a case by case basis. Paragraph 52 requires that any decision or transfer relating to a spill over effect must be jointly agreed by the Scottish and UK Governments.

The Scottish Government set out its proposals for the use of new Scottish income tax powers on 22 March 2016. The accompanying policy document provided estimates of the likely financial impacts on individual taxpayers of the proposal, and of expected additional revenues.

Under new income tax powers set out in the Scotland Act 2016, all Scottish non-savings and non-dividend income tax will accrue to the Scottish Government from the tax year 2017-18 onwards. The Scottish Government set out its proposal for the use of these powers on 22 March 2016, including an estimate of the increased revenue expected as a result of increasing the threshold for the higher rate of income tax in Scotland at a lower rate than in the rest of the UK from 2017-18 to 2021-22. The estimate provided included behavioural effects.

It is not expected that increasing the threshold for the higher rate of income tax in Scotland at a lower rate than in the rest of the UK will have any effect on the payments that the UK Government would provide to Scotland under the fiscal framework provisions covering ‘no detriment due to policy spill over effects’ described in paragraphs 44 to 53 of the agreement.

The process for adjusting the Scottish block grant in respect of the newly devolved taxes and other powers will take place on an annual cycle. Separate adjustments will be calculated in respect of each tax and other relevant power. The fiscal framework and accompanying technical annex sets out how calculations will be carried out.

Paragraphs 44 to 53 of the fiscal framework agreement set out arrangements for further adjusting the block grant in respect of policy spillover effects. As explained in the answer to question S5W-00400 on 15 June 2016, consideration of these effects will be undertaken on a case by case basis, and any decision or transfer relating to a spillover effect must be jointly agreed by the Scottish and UK Governments.

All answers to written parliamentary questions are available on the Parliament's website, the search facility for which can be found at: http://www.parliament.scot/parliamentarybusiness/28877.aspx