By Katlyn.Frey@ColoradoCollege.edu - 6/21/2016
When I run the code, all of the pictures pop up quickly and stay on the screen. I want the to pop up one at a time. The refresh rate on my computer is 60Hz. I'm assuming there is something wrong with my trials, but I'll include my coding for the pictures and blocks too.
<text fixation>
/items = ("+")
/color = (255, 255, 255)
/txbgcolor = (0, 0, 0)
/erase = false
</text>
<picture noisescreen>
/items =("noisescreen.jpg")
/position = (50, 50)
/valign = center
/halign = center
</picture>
<picture bascissors1>
/items = ("scissors1.jpg")
/position = (50, 50)
/valign = center
/halign = center
</picture>
<picture tiaosnake1>
/items = ("snake1.jpg")
/position = (50, 50)
/valign = center
/halign = center
</picture>
<trial Scissors1Snake1Scissors2practice>
/pretrialpause = 300
/validresponse = ("b", "a")
/correctresponse = ("a")
/stimulusframes = [1=fixation; 5=bascissors1; 7=noisescreen; 12=tiaosnake1; 14=noisescreen; 20=tiaosnake1]
/posttrialpause = 100
</trial>
//refresh rate is 60Hz (1 frame = 16.7 ms for 60Hz)
//fixation (1 frame, 16.7 ms); bascissors1 (4 frames, 66.8 ms); noisescreen (2 frames, 33.4 ms); tiaosnake1 (4 frames, 66.8 ms);
//noisescreen (2 frames, 33.4 ms); bascissors1 (i need to figure out how to make this last until they press a button)
<trial Scissors1Snake1Snake2practice>
/pretrialpause = 300
/validresponse = ("a", "b")
/correctresponse = ("b")
/stimulusframes = [1=fixation; 5=bascissors1; 7=noisescreen; 12=tiaosnake1; 14=noisescreen; 20 =bascissors1]
/posttrialpause = 100
</trial>
<block ABXpractice>
/trials = [1-4= noreplace(Scissors1Snake1Scissors2practice, Scissors1Snake1Snake2practice)]
/bgstim = (fixation)
/errormessage = (errormessage, 300)
/blockfeedback = (latency, correct)
</block>
<block ABXtrials>
/preinstructions = (begin)
/trials = [1-2= noreplace(Scissors1Snake1Scissors2practice, Scissors1Snake1Snake2practice)]
/bgstim = (fixation)
</block>
Please help me find my mistake!
Katlyn
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By Dave - 6/21/2016
Stimuli -- once drawn to the screen in a trial -- are supposed to remain on-screen for the duration of the trial (usually until a response is given). If you want to "remove" a stimulus during a trial, you have to cover it up with another stimulus (e.g. a <shape>) at the desired point in time. You will find this covered in the "How to erase stimuli" topic in the Inquisit documentation:
https://www.millisecond.com/support/docs/v4/html/howto/howtoerase.htm
Here's a very simple example to illustrate:
<block someblock>
/ trials = [1-4 = sometrial]
</block>
<trial sometrial>
/ stimulusframes = [1=a; 11=erase, b; 21=erase, c]
/ validresponse = (57)
</trial>
<text a>
/ items = ("A")
/ position = (25%, 25%)
</text>
<text b>
/ items = ("B")
/ position = (50%, 50%)
</text>
<text c>
/ items = ("C")
/ position = (75%, 75%)
</text>
<shape erase>
/ shape = rectangle
/ color = white
/ size = (100%, 100%)
</shape>
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By Katlyn.Frey@ColoradoCollege.edu - 6/22/2016
thank you! That fixed the problem.
one more question though.... I can't see the editor (that shows you the reasons why your script isn't run) at the bottom of my screen. How do pull this up again?
Thanks,
Katlyn
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By Dave - 6/22/2016
You should be able to display or remove the panels at the bottom of the editor via the View menu.
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