RE: trials within block start after 15 seconds

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RE: trials within block start after 15 seconds

trials within block start after 15 seconds

Author	Message
ChristineH	ChristineH posted 11 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 6, Visits: 21	I have a several blocks that look kinda like this <block n_back_Excavator> / preinstructions = (n_backExcavator, n_backExcavatorHartslag, n_backExcavatorStart) / bgstim = (komatsu) / trials = [1-5 = falseE; 6 = trueE; 7 = falseE; 8 = trueE; 9-10 = falseE; 11 = trueE; 12-15 = falseE; 16 = trueE; 17-18 = falseE; 19 = trueE; 20-22 = falseE; 23-24 = trueE; 25-29 = falseE; 30 = trueE; 31-33 = falseE; 34-35 = trueE] /postinstructions = (n_backExcavatorStop) </block> The page " n_backExcavatorStart" is the last page shown before the trials start. I would like this page to be shown for 15 seconds, and than the trials should automatically start. How can I achieve this without changing too much of my script (it's veeeery long)? Also, my pages have, as a standard, buttons to go to the next page or previous page. I would like to cut these from the " n_backExcavatorStart" page (but not from the others!!), since the trials should start automatically after this. Thanks!
	Reply Like 24
Dave	Dave posted 11 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	You can't do this using instruction pages (i.e. <page> or <htmlpage> elements run via /pre- and /postinstructions). What you have to do is implement a different way to display your instructions, i.e., using standard <text>, <picture> and <trial> elements. In summary, get rid of the 'n_backExcavatorStart' page, set up a <trial n_backExcavatorStart> displaying the same information instead <trial n_backExcavatorStart> ... / validresponse = (noresponse) / trialduration = 15000 </trial> and do <block n_back_Excavator> / preinstructions = (n_backExcavator, n_backExcavatorHartslag) / bgstim = (komatsu) / trials = [1=n_backExcavatorStart; 2-6 = falseE; 7 = trueE; ...] /postinstructions = (n_backExcavatorStop) </block>
	Reply Like 22
ChristineH	ChristineH posted 11 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 6, Visits: 21	Thanks for your reply! The problem, however, is that I have a sound starting with the actual task, and the 15s waiting period is not part of the task. Thus, now I hear the sound while waiting for the task to start, which is not what I want. Ideally, the sound should start with my second trial, which is the first trial of the task. Is there a way to achieve this? Best, Christine
	Reply Like 20
ChristineH	ChristineH posted 11 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 6, Visits: 21	Wait, I just need to make two blocks, one for the pages, and one for the actual task.
	Reply Like 21
Dave	Dave posted 11 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	Yes, splitting things up into separate <blocks> is probably the best option here.
	Reply Like 22