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Display single letter of text phrase at a time in a single trial

asnuser — Fri, 06 Mar 2020 20:42:32 GMT

I have a series of text phrases, and I would like to present one letter at a time of that phrase in a single trial, and control the speed at which each letter is added on. Is there a way to loop through an item list and do this without building individual letter stimulus sets for each text item? The duration of the trial should therefore be based on the number of letters in the phrase presented.

[code]<text slow>
/ items = slowitems
/ color = black
/ position = (50, 50)
/ txbgcolor = transparent
/ txcolor = black
/ fontstyle = ("Arial", 24pt)
</text>

<item slowitems>
/1 = " slow1 "
/2 = " slow2 "
/3 = " slow3 "
</item>

<trial slowtrial>
/ validresponse = (" ")
/ correctresponse = (" ")
/ posttrialpause = 4000
/ stimulustimes = [1=slow]
</trial>[/code]

RE: Display single letter of text phrase at a time in a single trial

Dave — Fri, 06 Mar 2020 20:42:32 GMT

+x[quote]

[b]asnuser - 3/6/2020[/b]
+x[quote]

[b]Dave - 3/2/2020[/b]
+x[quote]

[b]Dave - 3/2/2020[/b]
+x[quote]

[b]asnuser - 3/2/2020[/b]
I have a series of text phrases, and I would like to present one letter at a time of that phrase in a single trial, and control the speed at which each letter is added on. Is there a way to loop through an item list and do this without building individual letter stimulus sets for each text item? The duration of the trial should therefore be based on the number of letters in the phrase presented.

[code]<text slow>
/ items = slowitems
/ color = black
/ position = (50, 50)
/ txbgcolor = transparent
/ txcolor = black
/ fontstyle = ("Arial", 24pt)
</text>

<item slowitems>
/1 = " slow1 "
/2 = " slow2 "
/3 = " slow3 "
</item>

<trial slowtrial>
/ validresponse = (" ")
/ correctresponse = (" ")
/ posttrialpause = 4000
/ stimulustimes = [1=slow]
</trial>[/code]

[/quote]

This can be done. You'll want to take a look at the self-paced reading script, which you can modify to do this.
[/quote]

A quick modification of that script to illustrate is attached.
[/quote]

I added an interstimulus trial with a fixed duration by changing endtrial to something like this:
[code]<trial endtrial_Cslow>
/ stimulusframes = [1=background, fixation]
/ validresponse = (0)
/ trialduration = 4000
/ branch = [
return (trial.getstim_Cslow);
]
</trial>[/code]

I want to have participants respond to a likert scale after they see each sentence. How do I build that as trial into the block, after the endtrial?

[/quote]

From the endtrial, /branch to the likert. From the likert then /branch to the getstim_Cslow trial.

RE: Display single letter of text phrase at a time in a single trial

asnuser — Fri, 06 Mar 2020 20:11:28 GMT

+x[quote]

[b]Dave - 3/2/2020[/b]
+x[quote]

[b]Dave - 3/2/2020[/b]
+x[quote]

[b]asnuser - 3/2/2020[/b]
I have a series of text phrases, and I would like to present one letter at a time of that phrase in a single trial, and control the speed at which each letter is added on. Is there a way to loop through an item list and do this without building individual letter stimulus sets for each text item? The duration of the trial should therefore be based on the number of letters in the phrase presented.

[code]<text slow>
/ items = slowitems
/ color = black
/ position = (50, 50)
/ txbgcolor = transparent
/ txcolor = black
/ fontstyle = ("Arial", 24pt)
</text>

<item slowitems>
/1 = " slow1 "
/2 = " slow2 "
/3 = " slow3 "
</item>

<trial slowtrial>
/ validresponse = (" ")
/ correctresponse = (" ")
/ posttrialpause = 4000
/ stimulustimes = [1=slow]
</trial>[/code]

[/quote]

This can be done. You'll want to take a look at the self-paced reading script, which you can modify to do this.
[/quote]

A quick modification of that script to illustrate is attached.
[/quote]

I added an interstimulus trial with a fixed duration by changing endtrial to something like this:
[code]<trial endtrial_Cslow>
/ stimulusframes = [1=background, fixation]
/ validresponse = (0)
/ trialduration = 4000
/ branch = [
return (trial.getstim_Cslow);
]
</trial>[/code]

I want to have participants respond to a likert scale after they see each sentence. How do I build that as trial into the block, after the endtrial?

RE: Display single letter of text phrase at a time in a single trial

asnuser — Mon, 02 Mar 2020 20:51:36 GMT

Thank you, this was an extremely helpful example!

RE: Display single letter of text phrase at a time in a single trial

Dave — Mon, 02 Mar 2020 20:08:11 GMT

+x[quote]

[b]Dave - 3/2/2020[/b]
+x[quote]

[b]asnuser - 3/2/2020[/b]
I have a series of text phrases, and I would like to present one letter at a time of that phrase in a single trial, and control the speed at which each letter is added on. Is there a way to loop through an item list and do this without building individual letter stimulus sets for each text item? The duration of the trial should therefore be based on the number of letters in the phrase presented.

[code]<text slow>
/ items = slowitems
/ color = black
/ position = (50, 50)
/ txbgcolor = transparent
/ txcolor = black
/ fontstyle = ("Arial", 24pt)
</text>

<item slowitems>
/1 = " slow1 "
/2 = " slow2 "
/3 = " slow3 "
</item>

<trial slowtrial>
/ validresponse = (" ")
/ correctresponse = (" ")
/ posttrialpause = 4000
/ stimulustimes = [1=slow]
</trial>[/code]

[/quote]

This can be done. You'll want to take a look at the self-paced reading script, which you can modify to do this.
[/quote]

A quick modification of that script to illustrate is attached.

RE: Display single letter of text phrase at a time in a single trial

Dave — Mon, 02 Mar 2020 19:57:40 GMT

+x[quote]

[b]asnuser - 3/2/2020[/b]
I have a series of text phrases, and I would like to present one letter at a time of that phrase in a single trial, and control the speed at which each letter is added on. Is there a way to loop through an item list and do this without building individual letter stimulus sets for each text item? The duration of the trial should therefore be based on the number of letters in the phrase presented.

[code]<text slow>
/ items = slowitems
/ color = black
/ position = (50, 50)
/ txbgcolor = transparent
/ txcolor = black
/ fontstyle = ("Arial", 24pt)
</text>

<item slowitems>
/1 = " slow1 "
/2 = " slow2 "
/3 = " slow3 "
</item>

<trial slowtrial>
/ validresponse = (" ")
/ correctresponse = (" ")
/ posttrialpause = 4000
/ stimulustimes = [1=slow]
</trial>[/code]

[/quote]

This can be done. You'll want to take a look at the self-paced reading script, which you can modify to do this.