Millisecond Forums

If you play back an animation (a video / a gif) as background stimulus, the screen portion displaying that animation has to be redrawn constantly (after all, an animation is nothing more than a rapid sequence of static images). Thus you cannot overwrite it with a simple static stimulus (such as a <shape>).

Depending on how you want your script to behave, you can either (1) overwrite the fixation animation using *another* blank gif-animation or (2) display the fixation animation via a <trial>'s /stimulustimes or -frames instead of /bgstim (which will stop the animation when the trial terminates).

Thanks a lot, you're right !
 refreshing - it is so simple.


But what can I do to erase this gif fixation point in target.trial?

Is there any way? Do you have any idea?

Thanks

I've listed two options in my previous reply (these were added for clarity).

Thanks
I try, but unfortunetly it does not work.

Option 1 I still have the same situation, I create white blank gif animation to erase fixation point, but fixation point is still on first plan,
then I create black gif  animation and black animation is unable to erase fixation point. It looks like video bgstim will be always before mask.



Option 2 in my sript trials are replaced very fast, one letter- one trial, and if i try set fixation poin as a stimuliframe/stimulitiem i have no smooth movement of gif animation. I have very short blinks.  Mayby I need to rewrite my script  to use animation as fixation point ;/

Thank you anyway.

I see. Consider doing something along the lines of:


<values>
/trial_no=0
/trial_max=6
/trial_set=0
/target1_in_sequence=1
/target2_in_sequence=3
/target1_position=0
/target2_position=0
/transorm_count =0
/timeout=100
/range=0
/position=0
/hposition=50
/vposition=50
</values>

<values>
/a=0
/b=0
</values>

<video video_fp>
/items=("fp200.gif")
/size = (100,100)
/erase = false
/loop=true
/hposition = values.hposition
/vposition= values.vposition
</video>

<text text_fp>
/items=("+")
/erase = false
</text>

<item stimulus>
/1 = "A"
/2 = "B"
/3 = "C"
/4 = "D"
/5 = "E"
/6 = "F"
/7 = "G"
/8 = "H"
/9 = "W"
/10 = "J"
</item>

<item set>
</item>

<list pos>
/items = (1,2,3)
</list>

<list stimulus>
/items = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
/replace = false
</list>

<text S1L>
/items = stimulus
/position = (90,50)
/fontstyle = ("Arial", 10%)
/select = list.stimulus.nextvalue
/size = (100,100)
/erase = true(255,255,255)
</text>

<text S2L>
/items = stimulus
/position = (75,80)
/fontstyle = ("Arial", 10%)
/select = list.stimulus.nextvalue
/ size = (100,100)
/erase = true(255,255,255)
</text>

<text S3L>
/items = stimulus
/position = (75,20)
/fontstyle = ("Arial", 10%)
/select = list.stimulus.nextvalue
/ size = (100,100)
/erase = true(255,255,255)
</text>

<text target1>
/ items = set
/ txcolor = (0,0,139)
/ fontstyle = ("Arial", 10%)
/select = values.target1_in_sequence
/size = (400,400)
/position = (50,50)
</text>

<text target2>
/ items = set
/ txcolor = (0,0,139)
/ fontstyle = ("Arial", 10%)
/ select = values.target2_in_sequence
/ size = (400,400)
/position = (50,50)
</text>

<text tak>
/items = ("tak  -> ")
/fontstyle = ("Calibri", 5%)
/position = (75,80)
</text>

<text nie>
/items = (" <-  nie")
/fontstyle = ("Calibri", 5%)
/position = (25,80)
</text>

<trial A>
/ontrialbegin=[values.trial_no+=1]
/ontrialbegin = [
if (list.pos.nextvalue==1) trial.A.setstimulustime(text.S1L,0);           
if (list.pos.nextvalue==2) trial.A.setstimulustime(text.S2L,0);
if (list.pos.nextvalue==3) trial.A.setstimulustime(text.S3L,0);]

/timeout = values.timeout
/ontrialend = [
if(trial.A.stimulustime(0)=="text.S1L") item.set.item = text.S1L.currentitem;
if(trial.A.stimulustime(0)=="text.S2L") item.set.item = text.S2L.currentitem;
if(trial.A.stimulustime(0)=="text.S3L") item.set.item = text.S3L.currentitem;
values.position=trial.A.stimulustime(0);
trial.a.clearstimulusframes(0)]

/branch = [if (values.trial_no<values.trial_max) trial.A]
</trial>

<trial target1>
/stimulustimes= [0=target1,nie,tak]
/correctresponse = (203)
/validresponse = (203,205)
</trial>

<trial target2>
/ontrialbegin = [values.a=0;
 values.b=0]
/stimulustimes= [0=target2,nie,tak]
/correctresponse = (205)
/validresponse = (203,205)
/branch = [trial.reset]
</trial>

<trial reset>
/ ontrialbegin = [item.set.clearitems(); list.stimulus.reset();list.pos.reset(); values.trial_no=0;]
/ recorddata = false
/ timeout = 200
</trial>

<block A>
/trials= [1=A]
/bgstim = (video_fp)
</block>

<block Atarget>
/trials= [1=sequence(target1,target2)]
</block>

<expt>
/ blocks = [1-10=sequence(a,atarget)]
</expt>

Yes!
Works perfect
Thank You ;)