Counterbalancing more than 3 conditions - "item.get() has been removed in OpenSesame 4"

ns111021

I followed the counter-balancing tutorial, and the error code is in response to "MainSequence" where you put =self.get('b1') == self.get('count_mainsequence')

How should I substitute this?

Thanks!

Nate

sebastiaan

Hi @ns111021 ,

Using self.get() to access experimental variables was already deprecated for a long time, and has now been completely removed in OpenSesame 4.0. Experimental variables are simply global variables, which means that you should be able to use the following run-if expression: b1 == count_mainsequence.

See also:

• https://osdoc.cogsci.nl/4.0/manual/variables/

Hope this helps!

— Sebastiaan

ns111021

Hi sebastiaan,

Thank you for the quick response. Ultimately I want to counterbalance 4 blocks: It won't let me attach photos here so here is my code pasted below. It says there is an issue with the " :" in subject_nr % 4 == 1:

Code for in-line script placed in same spot as video:

subject_nr % 4 == 1:

b1 = 0

b2 = 1

b3 = 2

b4 = 3

elif subject_nr % 4 == 2:

(same notation as above but b1=1, b2=2, b3=3, b4=0)

elif subject_nr % 4 == 3:

(same notation as above but b1=2, b2=3, b3=0, b4=1)

else:

b1 = 3

b2 = 0

b3 = 1

b4 = 2

b1 = 'b1'

b2 = 'b2'

b3 = 'b3'

b4 = 'b4'

Then under MainSequence I followed your recommendation:

Block1 (run if column-->) b1 == 'count_MainSequence'

Block 2 (run if column-->) b2 == 'count_MainSequence'

Block 3 (run if column-->) b3 == 'count_MainSequence'

Block 4 (run if column-->) b4 == 'count_MainSequence'

Thank you so much!

Nate

sebastiaan

Hi @ns111021 ,

The example that I gave is for a run-if expression, which is the short one-line Python expression that you can use in sequence items to indicate whether or not an item should be run. Your example seems to refer to an inline_script , which is a full Python script. My recommendation would be to take a step back and walk through he intermediate Python tutorial. All of the concepts that you are running into now are explained there.

• https://osdoc.cogsci.nl/4.0/tutorials/intermediate/

See also:

• https://osdoc.cogsci.nl/4.0/manual/python/about/

Once you have familiarized yourself with the basics of inline_script and run-if expressions, don't hesitate to post further questions here!

— Sebastiaan