Randomizing instructions before picture presentation / rating screen

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Randomizing instructions before picture presentation / rating screen

Randomizing instructions before picture presentation / rating screen

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beccabos	beccabos posted 12 Years Ago HOT Topic Details Share Topic
Group: Forum Members Posts: 24, Visits: 59	I'm trying to program an experiment that includes multiple screens in a single "trial", e.g. an instruction screen, a picture, and rating screen. The instruction screen includes three different versions (NOW LATER STRATEGY) and then should present a randomly selected picture, and then proceed to a rating screen with a likert scale. I'm having trouble with a few things: 1) I don't know where to change the location of picture files / where to upload them to. 2) I don't know how to randomize the instruction screen... is that in the block section? another [1-4=noreplace(instructions)]? 3) I don't know how to make the likert scale without making it an image. thoughts? Thanks so much! See below... B **DEFINING EXPERIMENT <expt> /blocks = [1=practice; 2=1] </expt> <data> /columns =[date time subject blocknum trialnum trialcode response latency stimulus] /format=tab </data> <defaults> /fontstyle = ("Arial", 3.5%) /screencolor = (0,0,0) /txbgcolor = (0,0,0) /txcolor = (255, 255, 255) /minimumversion = "3.0.0.0" </defaults> INSTRUCTIONS * <instruct welcome> / txcolor = (255, 255, 255) / screencolor = (0, 0, 0) / nextkey = (" ") / prevkey = ("p") / nextlabel = "(Space) Next page" / prevlabel = "(p) Previous page" </instruct> <page welcome> Welcome to this experiment. </page> <instruct block> / txcolor = (255, 255, 255) / screencolor = (0, 0, 0) / nextkey = (" ") / prevkey = ("p") / nextlabel = "(Space) Next page" / prevlabel = "(p) Previous page" </instruct> <page block> Here are the instructions! </page> <instruct thankyou> / txcolor = (255, 255, 255) / screencolor = (0, 0, 0) </instruct> <page thankyou> Thanks!!!!! </page> * STIMULI **** <item imagelist1> /1 = "1.jpg" /2 = "2.jpg" /3 = "3.jpg" /4 = "4.jpg" </item> <item imagelist2> /1 = "5.jpg" /2 = "6.jpg" /3 = "7.jpg" /4 = "8.jpg" </item> <item instructions> /1 = "NOW" /2 = "LATER" /3 = "STRATEGY" </item> <item fixation> /1 = "+" </item> this will need to be set up as a likert scale or image <item rating> /1 = "1" /2 = "2" /3 = "3" /4 = "4" /5 = "5" </item> <text instructions> /items= instructions /select = replace /position = (50,50) /txcolor = (255,0,0) </text> <picture imagelist1> /items = imagelist1 /position = (50,50) /select = replace /size = (300,300) </picture> <picture imagelist2> /items = imagelist2 /select = replace /position = (50,50) /size = (300,300) </picture> <text fixation> /items = fixation /position = (50,50) /txcolor = (255,0,0) </text> defining trial <trial ROCprac> /stimulustimes = [1=fixation; 500=list.instructions; 3500=list.imagelist1; 9000=rating; 13000=fixation] /validresponse = ("1","2","3","4","5") /pretrialpause = 500 /timeout = 10000 </trial> <trial ROC> /stimulustimes = [1=fixation; 500=list.instructions; 3500=list.imagelist2; 9000=rating; 13000=fixation] /validresponse = ("1","2","3","4","5") /pretrialpause = 500 /timeout = 13500 </trial> *defining block <block practice> /trials = [1-4=noreplace(imagelist1)] /preinstructions = (welcome, practice_instructions) /postinstructions = (thankyou, practice_instructions) </block> <block 1> /trials = [1-4=noreplace(imagelist2)] /preinstructions = (block, 1_instructions) /postinstructions = (thankyou, 1_instructions) </block>
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Dave	Dave posted 12 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	I'm trying to program an experiment that includes multiple screens in a single "trial", e.g. an instruction screen, a picture, and rating screen. The instruction screen includes three different versions (NOW LATER STRATEGY) and then should present a randomly selected picture, and then proceed to a rating screen with a likert scale. All of this can be done via /stimulustimes in a single <likert> element. 1) I don't know where to change the location of picture files / where to upload them to. In case of a web experiment, you upload them to the millisecond server in step 2 of the Web Script Wizard when registering your script. 2) I don't know how to randomize the instruction screen... is that in the block section? another [1-4=noreplace(instructions)]? Depends on what you want to do. Normally you simply use the given stimulus element's (here: <text>) /select attribute. 3) I don't know how to make the likert scale without making it an image. thoughts? As already mentioned in response to Q1, see the documentation for the <likert> element. I would also recommend you give the tutorials in the documentation another look as these cover the basic aspects your questions touch upon.
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beccabos	beccabos posted 12 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 24, Visits: 59	I'm trying to program an experiment that includes multiple screens in a single "trial", e.g. an instruction screen, a picture, and rating screen. The instruction screen includes three different versions (NOW LATER STRATEGY) and then should present a randomly selected picture, and then proceed to a rating screen with a likert scale. All of this can be done via /stimulustimes in a single <likert> element. Does this mean that I would remove the <trial> element and replace it with the <likert> element? What if I only wanted the likert screen visible for the rating part (9000ms - 13000ms)? Would I use both then? Depends on what you want to do. Normally you simply use the given stimulus element's (here: <text>) /select attribute. What I want to do is have three different words/instructions appear on the screen before an image. Both the instructions and images would be randomized. I figured out how to randomize the images; is it the same for text (e.g. "replace"). Thanks!
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Dave	Dave posted 12 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	Does this mean that I would remove the <trial> element and replace it with the <likert> element? Yes. A <likert> is a special type of <trial>. What if I only wanted the likert screen visible for the rating part (9000ms - 13000ms)? The <likert> allows you to control that via its /responsetime attribute (details in the docs). Would I use both then? No, that should not be necessary here. What I want to do is have three different words/instructions appear on the screen before an image. Both the instructions and images would be randomized. I figured out how to randomize the images; is it the same for text (e.g. "replace"). Yes, the type of stimulus makes no difference as to how selection works.
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beccabos	beccabos posted 12 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 24, Visits: 59	Wonderful, thank you so much! The program is now running (yay!!!) but I have a few other questions that I can't find answers to in the help/tutorial. 1. How do I get the rating text "Answer this question" and the scale to sync? They are one after another now. <text rating> /items = rating /position = (50,50) /txcolor = (255,0,0) </text> ***defining trial <likert ROCprac> / stimulustimes = [1=fixation; 500=instructions; 3500=imagelist1; 9000=rating; 13000=fixation] / pretrialpause = 500 / timeout = 13500 / anchors = [1="not at all"; 2="not much"; 3="neutral"; 4="some"; 5="a lot"] / position=(50, 90) </likert> 2. How do I get an image to erase mid-trial? I can get it to disappear at the end, but not after it is presented. Thanks again!
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Dave	Dave posted 12 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	1. How do I get the rating text "Answer this question" and the scale to sync? As already mentioned in my previous reply, you need to specify the desired /responsetime. Here: / responsetime = 9000 2. How do I get an image to erase mid-trial? I can get it to disappear at the end, but not after it is presented. See the "How to erase stimuli" topic in the documentation.
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