0 votes
in SoSci Survey (English) by s276086 (110 points)

Hi everyone!

I have a problem with image randomisation.

  • I have 4 experimental groups and 2 treatment conditions (set of image and text);
  • 2 sets of images with 10 images per set (20 images in total);
  • each experimental group I show randomised questionnaire;
  • a questionnaire consists of several pages including 3 pages with images and questions about it;
  • I want to show 3 random pictures out of 10 images per experimental group/questionnaire.

I already added randomisation for questionnaires (it works) and randomisation for images: 3 codes per interview without returning and sequential assigning (it doesn't work).

The problem is that images repeat in pages and a participant sees not 3 different pictures but 2 same and 1 different (for example). I guess that it counts pictures per page and not per questionnaire.

I hope that I explained well :)

Could anyone suggest a solution for that?

1 Answer

0 votes
by SoSci Survey (304k points)

I want to show 3 random pictures out of 10 images per experimental group/questionnaire.

Okay, this is something you can easily tell the random generator. You only need a bit PHP code to actually display the three images, then.

Do you already have some PHP code? Please post it. If not, get a first inspiration here: Texts in the Random Generator and Placeholders.

And to vary the sets of images, you can, of course, draw from different random generators, depending on the group assignment.

Willkommen im Online-Support von SoSci Survey.

Hier bekommen Sie schnelle und fundierte Antworten von anderen Projektleitern und direkt von SoSci Survey.

→ Eine Frage stellen

Welcome to the SoSci Survey online support.

Simply ask a question to quickly get answers from other professionals, and directly from SoSci Survey.

→ Ask a Question