The next time someones scribbles on your work in a red pen, don’t be surprised by your reaction . . .

A 2007 study found that exposure to red was associated with a significantly worse performance than exposure to green.  A reason for this wasn’t conclusive, but may be that we’ve learnt to associated red with poor performance because red is traditionally the colour used to correct homework.

I now feel entirely justified in asking an organisation many years ago to spend a few extra pence on sourcing green biros for me to use to mark students’ assessments.

I always knew red was too harsh.