How to generate moving stimuli on E-Prime?

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José Á. Muñoz Garrido

May 26, 2021 17:01

We are currently trying to create an experiment on E-Prime based on the main principles of Time Estimation paradigms, i.e., by means of a simple stimulus (such as a simple point or small circle) that moves across the screen at a certain speed. Eventually, this stimulus can either disappear, remain visible untill it reaches the limit of the screen, or even get invisible by getting 'underneath' a superimposed surface (located at a certaint position within the screen). The key task here is to make an estimation about the time it will take for the point (due to its speed of motion) to reach such possible instants in each situation.

We are finding it a bit difficult to bring this kind of paradigms into E-Prime, since this suite appears to be more versatile for 'slide-like' objects (by means of succesive presentations of static images) rather than for actually moving objects.

We'll be thankful to receive any suggestion or info concerning this subject. Thank you very much in advance!

J. Ángel

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  David McFarlane June 01, 2021 14:47

  I think that the Examples on the PST website has an example or two of making animations.  You might also try searching the E-Prime Google Group, groups.google.com/group/e-prime.

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  José Á. Muñoz Garrido September 02, 2021 13:42

  Thank you very much for your answer! I am not sure where I can find those examples. Do you think you could help me find them? Sorry in advance. I don't have enough experience in this website yet.

  Anyway, you've already helped enough! Thank you again!

  We keep working.

  J. Ángel

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  José Á. Muñoz Garrido September 03, 2021 14:54 (Edited September 03, 2021 14:55)

  UPDATE: Just in case someone is interested on this small thread, I just want to share this experiment I've finally been able to find on the net. It is not exactly what I am after, but it is obviously closer than I had previously found around.

  https://support.pstnet.com/hc/en-us/articles/115001911488-Simple-Animation-Apparent-Motion-30066-

  The motion of the stimuli (i.e. lines, in this case) appears to get a bit flawed either by the refresh rate of the screen or the motion coding itself, and I have not yet fully understood the way they make the lines come into motion. However, I am not very familiar with the EBasic coding language, so that might be causing my 'slowness' at figuring out the meaning of the code.

  Special acknowledgement to the user D. McFarlane for his former answers.

  I keep an eye on this issue.

  J. Ángel

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