[solved] Lexical decision with different exposure time of stimuli response timeouts

Comments

• Edwin

  April 2014 edited 12:45PM

  Welcome to the forum!

  Although I can appreciate your urge for a quick answer (we've all been under deadline stress), what you seem to be asking is "please tell me exactly what to do". I strongly encourage you to do one (or several) of the tutorials, which can be found here. This will not take long, and will increase your understanding of the software a great deal!

  What you want to do is possible. In fact, it should be quite easy once you've familiarized yourself with OpenSesame a bit. A few pointers:

  1) You can define variables within a loop item. In your case, you could define a variable called stimword for the stimulus (the word itself), a variable called stimtype for the stimulus type (i.e. "word" or "nonword"), a variable called exptime for the exposure time, and a variable called resptimeout for the maximal response time. Please read this page for more information on loop items.

  2) Feedback is usually given using feedback items (what's in a name?). You can add multiple feedback items to a sequence, and run only one (or none) of them depending on what happens in a trial. You can do so using Run if statements. Please read this page for more information on this. An example: use [response] = None as a Run if statement for the timeout message, and [correct] = 0 as a Run if statement for incorrect responses.

  Please do not hesitate posting further questions that you cannot answer yourself after familiarizing yourself with OpenSesame.

  Good luck!
• eloel

  May 2014 edited 12:45PM

  Hi Edwin,

  Thank you very much for your response! As i feared, my english was once again a barrier for me to communicate the problem i had. I apologize once again. I wanted to ask if it was possible to make experiment like the one i wanted in opensesame or not. I didnt want you to make me a experiment , just to tell me was it possible or not, so i could know if it was smart for me to invest time in learning the program.

  So i read manuel, well most of it, and i menaged to make basic experiment but i still had some problems.
  In feedback, is it possible for me to> if participant didnt respond in time, or didnt respond correctly, to present them the same word they got wrong or took to much time to respond to? And how could i do that ?
• eloel

  May 2014 edited 12:45PM

  And to be honest, i didnt understand how making var exptime and resptimeout could help me to make stimuli that is presented for 150 ms, but for which participant has 1500 ms to respond
• eloel

  May 2014 edited 12:45PM

  Ok i solved the problem. Sry for the wall of text. Dunno how to make thread "solved".
  For everyone who has the same problem, i just found some inline_scripts that work wonders, cause parallel widget crushed my PC.
  So this may help :
  http://www.cogsci.nl/forum/index.php?p=/discussion/535/solved-how-to-repeat-a-particular-trial-until-correct-before-moving-on-to-next-trial
• Edwin

  May 2014 edited 12:45PM

  Excellent! Glad you figured it out! I will mark this as solved

  (FYI: click Edit on the original post, then you can adjust the title to say [solved])