On 2014 Aug 22, Hilda Bastian commented:

It's great to see such a thorough and rigorous body of work on this subject. This group provides a good overview of the portion downsizing issue, and the limited evidence base on interventions, at Vermeer WM, 2014.

A key part of the intervention in this trial (Poelman MP, 2015) is the interactive web-based PortionSize@warenessTool. Its development and trialing is described at Poelman MP, 2013, with these elements: background reading, an interactive flash game with photos of popular food products in the Netherlands, a flash game where you can upsize/downsize portions on screen, self-test score, information on portions for children and more.

It would be helpful if details about the availability of this intervention could be provided (e.g. where it can be viewed, if the code is open source, and if the license allows translation). The TIDieR checklist (Hoffmann TC, 2014) - the template for intervention description and replication - is a good framework for this. More details on the components of interventions is important for enabling better practice (Glasziou P, 2010).

On 2014 Aug 22, Hilda Bastian commented:

It's great to see such a thorough and rigorous body of work on this subject. This group provides a good overview of the portion downsizing issue, and the limited evidence base on interventions, at Vermeer WM, 2014.

A key part of the intervention in this trial (Poelman MP, 2015) is the interactive web-based PortionSize@warenessTool. Its development and trialing is described at Poelman MP, 2013, with these elements: background reading, an interactive flash game with photos of popular food products in the Netherlands, a flash game where you can upsize/downsize portions on screen, self-test score, information on portions for children and more.

It would be helpful if details about the availability of this intervention could be provided (e.g. where it can be viewed, if the code is open source, and if the license allows translation). The TIDieR checklist (Hoffmann TC, 2014) - the template for intervention description and replication - is a good framework for this. More details on the components of interventions is important for enabling better practice (Glasziou P, 2010).