items attribute

Member of

<list>

Syntax

/ items = (number, number, number, number, ...)

or

/ items = (string, string, string, string, ...)

or

/ items = (extent, extent, extent, extent, ...)

or

/ items = (value, value, value, value, ...)

or

/ items = [expression; expression; expression;...]

Parameters

Name	Type	Description
number	number	Any number to be included in the list.
string	string	Any string to be included in the list.
extent	extent	Any extent to be included in the list.
value	value	Any value string, number, property, or numeric range to be included in the list.
expression	expression	Any valid expression to be included in the list.

Remarks

The item pool can consist of any valid expression, including numbers, strings, properties, and numeric ranges.

When specifying complex expressions such as equations or function calls, the list of expressions must be enclosed in square brackets '[]' and separated by semicolons ';'.

For simple items such as numbers, strings, properties and numeric ranges, items can be enclosed in parentheses and separated by spaces or commas. Note, when specifying a numeric range (e.g., 1-100), the characters within the range must NOT be separated by spaces.

Examples

The following randomly selects the name of a president:

<list presidents>
/ selectionMode = uniform
/ items = ("George Washington", "John Adams", "Thomas Jefferson")
</list>

The following selects a countdown of numbers:

<list countdown>
/ selectionMode = sequence
/ items = (3 2 1)
</list>

The following selects a value of 2 for odd numbered trials and 1 for even numbered trials:

<list evenodd>
/ selectionMode = sequence
/ items = [if ( floor(mod(block.test.currentTrialNumber, 2)) == 0 ) 1 else 2]
</list>

The following randoly selects from two ranges of numbers without replacement:

<list countdown>
/ items = (1-10, 20-21)
</list>