User`s guide

E-Prime User’s Guide
Chapter 2: Using E-Studio
Page 47
Figure 1. Two stimuli assigned
to a single attribute value.
Figure 2. Two stimuli assigned to
separate attributes.
2.6.6.2 Use of block Procedure to pass in the trial Procedure
Note: A finished version of Stage4-ChangeTrialProc-LexicalDecision001.es is located in the C:\My
Experiments\Tutorials\Using E-Studio Stages directory.
Run different trial Procedures during different blocks. To do this, the value for the Procedure
attribute in the BlockList must be varied. For example, assume we wanted to run a
PrimeTrialProc (as was developed as TrialProc in Stage 3) and add a MaskTrialProc, in which the
prime word is presented but masked after 50ms. The running of two Procedures could be
accomplished by calling two different Procedure objects from the DesignList object. However, if
the Procedure is to be randomized by block, the BlockList must be used to determine the
Procedure run by the DesignList. This can be accomplished by passing the Procedure as an
attribute from the BlockList to the DesignList. Open the BlockList and add an attribute called
TrialProcName. Enter PrimeTrialProc and MaskTrialProc as the values for this new attribute.
Rename TrialProc to PrimeTrialProc, and make a copy of PrimeTrialProc. A copy may be made
via the Browser. Display the Browser by selecting it in the View menu or by pressing Alt+2.
Select PrimeTrialProc in the Browser, right click to display the context menu, and select copy.
Right click to display the context menu again, and select paste to place a copy of PrimeTrialProc
in the Browser. Rename the copy (named PrimeTrialProc1 by default) to MaskTrialProc.