The selectionmode attribute determines the method by which individual items are selected for presentation on a given trial. The default is random selection of items without replacement with uniform probability.
or
/ selectionmode = expressionselectionmode |
One of the following values:
|
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expression | An valid expression that evaluates to an integer. |
The default value is random.
The following first selects Washington, then Adams, and then Jefferson:
<list presidents>
/ items = ("George Washington", "John Adams", "Thomas Jefferson")
/ selectionmode = sequence
</list>