Pictograms should be used with care. Pictograms should be supported by written or oral communication. Pictograms should be performance tested on the population they are meant for.
Ros Dowes and Tina Ehlers at Rhodes University, South Africa have made very important research on pictograms and medicine. They presented their results at the FIP congress in 1999. Pharmaceutical Journal wrote an article about it. Link Article
Ros Dowse, South Africa.
Presentation FIP congress Nice, September 2002
Literature on research about pictograms
Regis Vaillancourt, Canada.
Presentation FIP congress New Orleans September 2004
Regis Vaillancourt, et al
Presentation FIP congress Cairo September 2005