The specific choice task is described as follows: ‘You are re-evaluating your
mode options from [origin] to [destination] for your shipments this month. You
have recurring shipments of non-bulk cargo (a shipping container or truckload
equivalent) of 20 tonnes for delivery on this corridor. [Percentage indicated
in background screens] of these shipments involve perishable items, and
[Percentage indicated in background screens] of these shipments must reach the
destination within 3 hours of the scheduled delivery time.
‘Given the mode service offerings in this corridor, how much of 100 per cent
of your cargo would you allocate to each of the modes?’
The interviewer guides the respondent through the use of a practice game,
before the respondent goes on to make decisions on the eight choice sets with
which he/she has been presented. An illustration of the practice game is found
in Figure 1.