defining valid combinations

[Matt Lenhart]

Hi Tim,

The best way to approach the script for your experiment will depend on
exactly what you plan on doing. For example, a dynamic array would be
preferred if you are unsure of how many array slots will be needed
throughout the experiment. The dynamic array will allow you to assign
and re-assign slots throughout the experiment. A fixed array will be
better if you only need to keep track of a specific number of values.
So, in this experiment, if you only need to store the previous 5
responses, a fixed array with 5 slots will be fine (e.g., in the same
manner as a fixed array of 24 slots is fine for storing the possible
responses).

Once you have selected the appropriate type of array, you will need to
create a global counter variable to keep track of which slot you are
at in the array. For example, say you name this variable nCount. After
each response from the subject, you will need to check to make sure
the response is valid (i.e., by looping through the valid responses
array), then check to make sure the response has not already been made
(i.e., by looping through the distinct responses array), and then
finally increment the counter and add the response to the distinct
responses array if it meets the criterion:

For nLoopCounter = 1 To UBound(arrValid)
 'Check that we have a valid response...
Next

For nLoopCounter = 1 To UBound(arrDistinct)
 'Check that we have a distinct response...
Next

'If the response meets both criteria...
If boolValid = True And boolDistinct = True Then
 nCount = nCount + 1

 arrDistinct(nCount) = Stimulus.RESP
End If

Keep in mind that the only script within each loop is just comparing
the current response to each slot. If a match is found in the first
case, then boolValid would be set to True. If a match is found in the
second loop, then boolDistinct is set to false.

If any of this is not clear or you run into any further difficulty
with this task, I would recommend making a support request at:
http://www.pstnet.com/e-prime/support/  While I do try to respond here
as often as possible, only requests made at the link provided are
guaranteed to receive a timely response from PST representative. If
you choose to respond here, I will try to reply as quickly as
possible, but I cannot assure you of that as official support requests
are handled first.

- Matt
PST Technical Consultant
http://www.pstnet.com/


On Aug 29, 6:15 am, Victor <t1m... at yahoo.co.uk> wrote:
> Hi David
>
> I have been using the E-basic Help.  The problem that I have is not
> fully understanding VB. I have gotten away with bootstrapping until
> now by using other sample experiments.  With the current problem, I
> can not find an example, nor am I sure if what I am writing is
> affecting the program in the way I intend, so I could be cose to a
> solution but I am probably more likely to be a million miles away.
>
> David McFarlane wrote:
> > Tim,
>
> > >I have referred to the help section of E-studio but to no avail.
>
> > Just a general comment, that is the wrong help section if you want
> > help with E-Basic constructs.  For that you want to go to the E-Basic
> > Help, i.e., Help > E-Basic Help  (*not* Help Topics).
>
> > -- David McFarlane, Professional Faultfinder
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