I am trying to run a reaction time task using the web version of Inquisit. For this task we have different pictures that the participant sees. We have to know which of the pictures each participant saw for the trials. In our data file, we specify in the experimental file
/columns =[date time subject blocknum trialnum trialcode response latency stimulusitem correct]
where "stimulusitem" I believe is what is supposed to tell us if they saw
/ 35 = "dotsame-dark--27.JPG"/ 36 = "dotsame-dark--33.JPG"
However, when we tested the data, the data file gave us "*" under the column "stimulusitem". Could someone please help us determine what we need to add in the experimental file program to maek ti record which picture they saw? It can be either the exact name fo the picture we give it, or just some way to identify the picture? Thank you so much,
-Claire
See https://www.millisecond.com/forums/Topic5105.aspx#5105 and the documentation for Inquisit's default data recording scheme.
Regards,
~Dave
Thank you so much for your response. We have the stimulusframes= [1=fixation} part in our program as you can see and it is still giving us the " * " error. <trial poswhitetrial>/ pretrialpause = 1000/ validresponse = ("q","p")/ correctresponse = ("p")/ stimulusframes = [1=fixation; 22=poswhite]/ posttrialpause = 200</trial><trial negwhitetrial>/ pretrialpause = 1000/ validresponse = ("q","p")/ correctresponse = ("q")/ stimulusframes = [1=fixation; 22=negwhite]/ posttrialpause = 200</trial>This is what the data file looks like:date time subject blocknum trialnum trialcode response latency stimulusitem1 correct102811 12:39 1 3 1 negwhitetrial 16 1603 1102811 13:11 9999 3 1 negwhitetrial 25 499 * 0102811 13:11 9999 3 2 negwhitetrial 16 265 * 1102811 13:11 9999 3 3 poswhitetrial 25 225 * 1102811 13:11 9999 3 4 poswhitetrial 25 218 * 1102811 13:11 9999 3 5 poswhitetrial 25 227 * 1102811 13:11 9999 3 6 negwhitetrial 25 204 * 0102811 13:11 9999 3 7 negwhitetrial 16 206 * 1102811 13:11 9999 3 8 negwhitetrial 16 216 * 1102811 13:11 9999 3 9 poswhitetrial 16 81 * 0I'm sorry to be so difficult, I just apparently don't understand exactly what we're supposed to fix in the script because I thought the "fixation" part was exactly what the solution was for the question you referred me to? Do we need to add "stiumulsitem" 72 times in the line where we list how many/what we want in the data columns line? They only see one picture at a time, with randomly selected pictures for each of the 72 trials. -Claire
Your trials display *two* stimuli:
/ stimulusframes = [1=fixation; 22=poswhite]
and
/ stimulusframes = [1=fixation; 22=negwhite]
respectively. Thus your /columns attribute must include *two* instances of 'stimulusitem':
/ columns = [..., stimulusitem, stimulusitem, ...]
With only *one* instance of 'stimulusitem' only the *first* stimulus (i.e., fixation) will be logged. It's not an error, it's the expected behavior (as detailed in the documentation topics and forum threads I referred you to).