The Commission for Social Care Inspection is to investigate whether severely disabled people are benefiting from Valuing People.
The study, revealed in a report published last week, will respond to concerns that this group is not doing as well out of Valuing People as people with less severe needs.
The CSCI also plans a study on home care, which will look at expanding and improving services to help people remain at home and focus on council commissioning.
And it will respond to plans in January's white paper on health and social care for a national framework for risk management in services, with an inquiry into attitudes to risk among service users.
Last week's report outlines the health and social care studies planned by the CSCI, the Healthcare Commission and the Audit Commission in 2006-7.
The Audit Commission may carry out a study into the performance of health and social care bodies in integrating care for people with long-term conditions, and the extent to which existing policies support this.
Health and Social Care Review and Studies Programme from www.audit-commission.gov.uk