bws1Design {RcmdrPlugin.BWS1}

Design Choice Sets for BWS1

Description

Design choice sets for BWS1 with a balanced incomplete block design.

Details

This dialog box uses the functions find.BIB and isGYD in package crossdes to design choice sets for BWS1 with a balanced incomplete block design. For details on the results of this dialog box, refer to the help content for the functions find.BIB and isGYD.

GUI elements of this dialog box are as follows.

• Name for design: An R object name into which choice sets generated using this dialog box are stored. The default name ‘BWS1design’ can be changed following R's rules for naming objects. If changed, you should take note of the new object name, which will be used later.

• Name for items: An object name for items entered in the ‘Items’ table (explained later). The default name ‘BWS1items’ can be changed following R's rules for naming objects. If changed, you should take note of the new object name, which will be used later.

• Save to file: A check box for saving both the resultant design object and the items object to a single external file in RDA format (.rda). If necessary, check this box.

• Number of items: A total number of items to be evaluated in BWS1 questions.

• Number of questions: A total number of BWS1 questions.

• Number of items per question: The number of items that appeared in each BWS1 question.

• Items: Item names. As items typed into this table will be used as variables in the following process, item names must follow R's rules for naming variables. Type names without skipping from ‘Item 1’.

• Number of iterations: Total number of iterations for searching for a design that meets the design parameters assigned above. The default is 1000.

• Seed for random number generator (optional): An integer value used as a seed for generating random numbers. If reproducibility is required, type an arbitrary value into this box.