Millisecond Forums

/ aoidurationthreshold determines the time a given participant must gaze within a specific area of interest before a hit is scored / that gaze is scored as a response.

> I'm trying to use the preferential looking script but I want to record the total looking time to each image on each trial rather than
> having it time out after a threshold is reached.

The problem with this idea is: How is the given trial supposed to terminate, i.e., accept a gaze at an object as a response if there is no threshold of any kind specified?

<trial puppypuppy>
/ ontrialbegin = [values.marker = (picture.puppyleft.currentindex * 100) + picture.puppyright.currentindex;]
/ ontrialbegin = [port.marker.setitem(values.marker, 1);]
/ stimulustimes= [1=puppyleft, puppyright, marker]
/ inputdevice = eyetracker
/ validresponse = (puppyleft, puppyright)
/ screencapture = true
/ draw = pen
/ showmousecursor = true
</trial>

Hi,

The trial duration is set to 2500 milliseconds. A correct look is marked when the participant looks longer to the target image than the distractor image on a given trial.

-SD

Then -- unless I'm missing something -- you should simply be able to set /aoithresholdduration to a value equal or greater to /trialduration.

I am wondering though, if something along the lines of

<eyetracker>
/ aoidurationthreshold = 1251
...
</eyetracker>

<trial mytrial>
/ stimulusframes = [1=target, distractor]
/ validresponse = (target, distractor)
/ correctresponse = (target)
/ inputdevice = eyetracker
/ trialduration = 2500
...
</trial>

would work...

I thought of the same thing, except that this assumes that the participant will look at the screen for the entire trial length. Because we are working with children, they often look off screen. So, for example, you might have someone look at the screen for 2000 out of the total trial duration of 2500 ms. In this case, they could have looked at the target for 1100ms, and the distractor for 900 ms, and we would want to credit them for looking at the target longer than the distractor. There is a minimum looking time, of course, since we would want gaze durations <500 ms to be counted.

The /aoidurationthreshold attribute must be tracking gaze to each picture to evaluate whether a given threshold is reached, the question is whether I can record this.

Hi there, 
I am currently working to set up a script for an eyetracking experiment where I want to be able to record the time that the participant spends looking at different stimuli (as seems to be detailed above). I'm wondering if there have been any updates that allow this to be possible?
Thanks!
Liz