The Hick-Hyman law states that as N increases, RT increases logarithmically (a+blog(N)). Log (10) =1 and 2log(5)=2x0.7 = 1.4. It will be faster therefore for people to make 1/10 choices than 1/5 choices twice. The second menu structure is faster.

This would be a 4 mark question. Explaining what the Hick-Hyman law states is worth 1 mark. 1 mark for having the formula correct. 1 mark for working out the numbers correctly. 1 mark for getting the right conclusion.