A group representing some survivors of mother and baby homes is to meet the head of an independent working group following a landmark report last week.
Birth Mothers and their Children for Justice NI will on Monday meet retired senior police officer Judith Gillespie, who led the working group into the homes.
The report found that more than 10,000 women and children, including rape and incest victims and a girl as young as 12, were sent to mother and baby homes in Northern Ireland between 1922 and 1990.
The Executive has ordered a "victim-centred" independent investigation to be set up following a six-month consultation with survivors.
However, campaigners have reiterated calls for a full statutory inquiry.
Solicitor Claire McKeegan, of Phoenix Law, representing Birth Mothers and their Children for Justice NI, said any inquiry "must have full powers of compulsion in terms of witnesses and documents in order to have the confidence of this group of survivors".
Ms McKeegan claimed there were gaps in the report because "so many of the institutions just couldn't be looked at in terms of the timescale, the access to witnesses and documents, and the limited scope that the research team (were given)".
She said only a few survivors were involved and many were not aware the research was being carried out.
"The report, whilst it's helpful, is an academic piece of research," she said.
Many survivors are concerned that sensitive paper records about women sent to the homes and their children are deteriorating and have not been properly archived.
Ms McKeegan added: "We intend to seek a commitment from the department that all documents are secured."
