Creating a new variable to display during feedback

ashiyer17

Hello!

I have a question regarding creating a new variable that I can display during the feedback item at the end of a block.

About the experiment: This is a mate budgeting experiment. So participants are shown 10 traits (as form_base items) that people might prefer in potential partners. At the end of each form_base item I've created a trait_score (this is named differently for each of the 10 traits) variable. The experiment is counterbalanced between 3 blocks: low, medium and high budget with a set 'total score' that can be reached. When a new form_base item begins, I want to be able to show the remaining 'total_score' as a sort of countdown

i.e. if 'total_score' for a budget = 20, & someone selects a trait for 8 then the remaining score on the next form_base item should be shown as 20-8 = 12.

I also want to be able to show the 'total_score' at the final feedback item with individual trait_score(s)

I am quite new to opensesame and python in general so I couldn't wrap my mind around if I could simply create this variable as part of form_base or if I'd need a whole new inline_script. Please help out!

sebastiaan

Hi,

Yes, in general terms you need an inline_script for this.

if 'total_score' for a budget = 20, & someone selects a trait for 8 then the remaining score on the next form_base item should be shown as 20-8 = 12.

You would do this with something like the following code in the Run phase of an inline_script :

var.total_score = var.total_score - var.trait_score

Of course the details depend on what you want to do exactly. But it seems that you mainly want to do basic arithmetic, and that should be fairly straightforward.

• https://osdoc.cogsci.nl/3.3/manual/python/var/

Cheers!

Sebastiaan