Pseudorandomization of text

Builder
1

WHAT ARE YOU TRYING TO ACHIEVE?
I want to present 2 types of text stimuli in a pseudorandomized order. The two types are “Visualizar” (presented 60 times) and “Reavaliar” (presented 30 times).

WHAT DID YOU TRY TO MAKE IT WORK?
I created blocks of 10 instructions, in which 6 are gonna be “Visualizar” and 3 are gonna be “Reavaliar”. In order to do so, i created a code component in the routine and had put this in the “Before experiment” tab:

#Create lists of instructions:

useRows_inst =

Visualizar = [‘Visualizar’ * 60]
Reavaliar = [‘Reavaliar’ * 30]

#Pseudorandomize instructions (I created a block of 10 instructions, in which 6 are gonna be “Visualizar” and 3 are gonna be “Reavaliar”):

for blockinst in range(10):
blocklist_inst =
for idxinst in range(6):
blocklist_inst.append(Visualizar.pop())
for idx in range(3):
blocklist_inst.append(Reavaliar.pop())
shuffle(blocklist_inst)
useRows_inst.extend(blocklist_inst)

In the builder, i created a text component, and in the text box i typed “$useRows_inst”.

WHAT SPECIFICALLY WENT WRONG WHEN YOU TRIED THAT?:
When i run the experiment, the text shown is the complete list of instructions, not even randomized.
What i want is that text shows one instruction per time, in the pseudorandomized order i created.

2

I’m not sure how your code relates to your request, or whether you want blocks of 9 instructions or 10 (since 6+3 = 9). However, is this any help?

blocklist_inst = []
for Idx in range(6)
     blocklist_inst.append('Visualizar')
for Idx in range(3)
     blocklist_inst.append('Reavaliar')
shuffle(blocklist_inst)

To pick one from the list you could pick:

useRows_inst = blocklist_inst.pop()
if len(blocklist_inst) ==0:
     for Idx in range(6)
          blocklist_inst.append('Visualizar')
     for Idx in range(3)
          blocklist_inst.append('Reavaliar')
     shuffle(blocklist_inst)
3

I tried your solution. Now my hole code is:

Instruction_Code:

#Define lists and shuffle:
blocklist_inst =
for idx in range(6):
blocklist_inst.append(‘Visualizar’)
for idx in range(3):
blocklist_inst.append(‘Reavaliar’)
shuffle(blocklist_inst)

#Pick one from list:
useRows_inst = blocklist_inst.pop()
if len(blocklist_inst) ==0:
for idx in range(6):
blocklist_inst.append(‘Visualizar’)
for idx in range(3):
blocklist_inst.append(‘Reavaliar’)
shuffle(blocklist_inst)

And the text box of the text component is now “$useRows_inst”.

However, now what this code is doing is to pick between “Visualizar” or “Reavaliar” and only shows this one instruction through all the 90 trials.

4

Which tabs are these code snippets in?

5

Before experiment tab.

6

Most of it should be Begin Experiment. Stuff that you want to change each repeat needs to be in Begin Routine.

7

I moved the second part of the code to the begin routine tab and it worked perfectly!

Thank you!

8

Just one more question:

How should i save data manually, since the text component is not taking it’s values from a loop?

I know it should be something like this:

thisExp.addData(useRows_inst, name_of_the_text_component)

Is this right?
And should this be at the begin routine tab?

9

thisExp.addData(‘Instruction’,useRows_inst)
In the begin routine tab

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