If you had been one of the original inventors of the WIMP interface, and engineers on the technical team had been sceptical about the advantages that it would bring, then:

(i) What two pieces of empirical evidence could you have presented to sceptics to help convince them? (ii) Describe the technique that you would use to collect data for each of these. (iii) Describe the technique that you would use to analyse each of those data sets.