You can download the default XML on the downloads page. In this section I will point out the customisation options at your disposal by modifying values in the XML.

Under task settings there is a section of code where we tell the application where to find the executable that handles the digit span task. The property name/value keys here are where we can set task-specific properties.

Number of trials

You can select how many trials of each span size you want. The properties to edit here are:

• 'spanTwoTrials'
• 'spanThreeTrials'
• 'spanFourTrials'
• 'spanFiveTrials'
• 'spanSixTrials'
• 'spanSevenTrials'
• 'spanEightTrials'
• 'spanNineTrials'

The default values for these properties are "3" for spans 2 through 7 and "0" for spans 8/9. Therefore as it stands the module will administer 3 trials at each list length up to 7 and none at list length 8 or 9. Simply change the integer values within the quotes for each span*Trials property to get the desired number of trials.

Sequential/Randomised trial order

This property decides if the trials are administered in sequential order or not with regards to the list lengths. If sequential then all list length 2 trials are given, followed by all list length 3 trials, and so forth. However, it is often the case that a researcher may wish to administer these trials in a random order so that the participant is not aware on any given trial how many digits they will have to store/recall. The property to edit is:

• 'randomisedTrials'

The default value is "0" which is the code for sequential order. The alternative is "1" which is the code for random order.

Digit range

Controls the range of digits that the application uses to select digits as stimuli in the trials. The properties to edit are:

• 'minDigit'
• 'maxDigit'

The default values are "1" and "99" respectively meaning that any presented digit can range from 1 to 99 (inclusive).