[solved] Choosing items based on values of a variable

Borisko

Hey everyone,

I am still new to OpenSesame, so sorry if my question is silly!

In my procedure I am prerating 48 stimuli on the scale from 1 to 9 and wanted to choose only 12 stimuli which I will show in the next loop. The condition here is that the 12 stimuli I want to pick will be rated as closest to the value 5 on the scale from 1 to 9 as possible and have no idea how to do it.

#I set a dictionary for preratings 

ratings = {} 

#I am presenting the stimuli from the list 'CS.txt'

CS_item = CS.pop()
exp.set('CS_item', CS_item)

#Then, I get the ratings here

ratings[self.get("CS_item")] = self.get("response")

# I sorted them according to the ratings

sorted_ratings = sorted(ratings, key=ratings.get) 

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And here I am stuck...does anyone have an idea how to select only 12 stimuli that were rated as closest to the value 5 as possible on the 1-9 point scale?

Would really appreciate any feedback.

Thank you in advance!

Cheers,
Bori

eduard

Hi Bori,

If you have your list with ratings, you can subtract 5 from each of them. What you get is a new list with values distributed between -4 and 5 centered around 0. Next, you can take the absolute values from each of those ratings and sort them. What you get is a list with the ratings sorted by their distance from 5 (from small to big).

Does this help?

Eduard

Borisko

Hi Eduard,

Thanks a lot!
I did exactly that and worked out perfectly!

Many thanks ☺️

Cheers,
Bori