Millisecond Forums

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patkelly2000 - 6/15/2022

Hello. So, I have zero experience with coding and I am doing the best that I can to use the Subliminal Priming Procedure (Bona Fide) by Dr. Katja Borchert as a framework for creating a subliminal priming task using an image prime. Dr. Borchert uses text primes, however, I would like to use image primes and I do not know how to set it so that the image disappears after a certain amount of time (ex. 100ms) before the mask, then target prime appear. Right now I have gotten the image to show up, but it remains on screen as the rest of the process unfolds. I am hoping that someone with coding experience can help me figure out if I have programmed this script correctly.

Gratefully,
Patrick Kelly

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Dave - 6/15/2022

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patkelly2000 - 6/15/2022

Hello. So, I have zero experience with coding and I am doing the best that I can to use the Subliminal Priming Procedure (Bona Fide) by Dr. Katja Borchert as a framework for creating a subliminal priming task using an image prime. Dr. Borchert uses text primes, however, I would like to use image primes and I do not know how to set it so that the image disappears after a certain amount of time (ex. 100ms) before the mask, then target prime appear. Right now I have gotten the image to show up, but it remains on screen as the rest of the process unfolds. I am hoping that someone with coding experience can help me figure out if I have programmed this script correctly.

Gratefully,
Patrick Kelly

(1) You need to use <picture> elements, not <image> elements. The latter are for use on surveypages only.
(2) Erasing stimuli is detailed in documentation: https://www.millisecond.com/support/docs/current/html/howto/howtoerase.htm
It works the same way, not matter whether it's <text> or <picture> stimuli.
(3) You'll want to work through the subliminal priming tutorial in the documentation, pay particular attention to how the trials are set up:
https://www.millisecond.com/support/docs/current/html/tutorials/subliminal/subliminalcreatingtrials.htm

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patkelly2000 - 6/15/2022

I followed the steps and came up with the error: ""item.primes.item(values.selectprime1)' Expression contains an invalid identifier"

I changed:
<item primes>
/1 = "Metapod"
/2 = "Shelder"
</item>

<text prime1>
/items = primes
/select = values.selectprime1
/ fontstyle = ("Courier New", parameters.fontheight, false, false, false, false, 5, 1)
/ txcolor = white
/txbgcolor = black
/position = (50%, 50%)
</text>

to

<picture primes>
/ items = ("BLM_Prime.jpg")
/ items = ("Neutral_Prime.jpg")
</picture>

<picture prime1>
/items = ("BLM_Prime.jpg")
/position = (50%, 50%)
</picture>