These are Clutter Image Ratings that have been done from a previous study which are widely used across the world.
This shows the severity of the problem in many homes across the UK. 2.5 % of the UK suffer from this mental illness which is potentially 1.2 million.
Please click here to view the Clutter Image Ratings http://www.oxfordclinicalpsych.com/view/10.1093/med:psych/9780199334940.001.0001/med-9780199334940-interactive-pdf-004.pdf The rating are via The International OCD Foundation and were originally from a study by Frost RO, Steketee G, Tolin DF, Renaud S. Development and validation of the Clutter Image Rating. Journal of Psychopathology and Behavioral Assessment. 2008;32:401–417.