Example "Transport" - Use of Random Parameters
As an example, a typical application task is created. The goal is to calculate the distance travelled by a vehicle based on speed and time. The speed is dependent on the vehicle type.
| In the example, the text variable {transport} will be randomly initialised with one of the following values: "bike", "bus", or "train". The numerical variable {speed} is randomly selected from a value range. Thus, the value range for the speed {speed} should be set in dependence of the selected vehicle {transport}, since a "bike" is generally slower than a "train". |
| For the dependent value setting, we use the variable condition. In the condition, we can define the value range for the variable {speed} depending on the selected value of the variable {transport}. For the bike ({transport}="bike"), for example, a value range of 10 to 30 (km/h) was set. |
| The given values of the task are integrated into the task text by specifying the variable name ({transport}, {speed}, and {hours}). In the example, the variable is included in a task of the type calculation interaction. The variable with the correct solution {distance} is bound to the gap. |
| One of the defined values will be randomly chosen for each participant and each test attempt. In the example, the value "bike" was randomly inserted, which is why a speed in the value range of 10 to 30 (km/h) was selected. |
