Intermixing stimuli from two loops randomly in OpenSesame
I’m developing a slightly tricky design in OpenSesame (a Python-based experiment builder). My stimuli comprise two kinds of sentences that contain different elements, and different numbers of elements. These sentences must be presented word by word. Furthermore, I need to attach triggers to some words in the first kind of sentences but not in the second kind. Last, these kinds of sentences must be intermixed within a block (or a sequence) of trials, because the first kind are targets and the second kind are fillers.
I need to present stimuli randomly from either of two loops within a sequence. Currently, when I try this arrangement using the interface, the resulting script ends up with run loop1 followed by run loop2, but I can’t find a way to ensure that the overarching sequence pulls randomly from either loop over successive trials. In other words, my goal is to intermix the stimuli from both loops.
I have searched for clues in the OpenSesame tutorials, in the OpenSesame forum, and elsewhere online, but to no avail.
Solution
Finally, I solved this by first distributing all the words in each sentence across different columns in the stimulus file, yielding ‘word1’, ‘word2’, etc. Next, in OpenSesame, I created a sketchpad for each word. Last, to prevent showing any words that were blank, I entered conditions such as [word7] != NA in the Run if field of the sequence.
Comments are provided by Disqus and are not loaded automatically. Loading them connects your browser to Disqus, which may use cookies and process data under its privacy policy. See this site's privacy notice for details.