using rshuffle when pulling items from csv file

[cassandra]

Hi Jeremy,

Me again! Almost there with this experiment. I know that “randomize” works in the PennController.Sequence when pulling items from a csv file. However, this seems to show all my items in complete random order which means that more than one test item will be shown in a row, which is not ideal for me. I used to use rshuffle in ibex but it’s not clear to me if this can still be done when items are being drawn from the csv file. I do have items labelled in my spreadsheet but I seem to only be able to specify the column using randomize, not the individual labels within that column.

Thanks so much!
-Cassandra

[Jeremy]

Hi Cassandra,

The labeling and sequence order system did not change in PennController, the only difference is that you no longer have to write var shuffleSequence = seq( ... ), you can use PennController.Sequence( ... ) instead. Items are labeled using the first argument of the PennController function that creates them (if provided as a string). Here’s an example (I use AddTable for the sake of illustration—using a CSV file works just as well):

PennController.AddTable( "myTable" , `Column1,Column2
UpperCase,Hello
LowerCase,hello
UpperCase,World
LowerCase,world`
)

PennController.Sequence( rshuffle("UpperCase","LowerCase") )

PennController.Template( "myTable" ,
  row => PennController( row.Column1 , // Using Column1 to label the trials
      newButton( row.Column2 )
        .print()
        .wait()
  )
)

Let me know if the example is unclear

Jeremy

[cassandra]

Oh great! Thanks! This helped a lot.

[Author]

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