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Type: Posts; User: David McFarlane

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    Sticky: Jason, Thanks. I already saw that page, and I...

    Jason, Thanks. I already saw that page, and I know that *DirectRT* achieves millisecond-quality timing by means of DirectX. But that's not my question here. And I already know that *MediaLab* (as...
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    Sticky: MediaLab RT accuracy?

    OK, so RT accuracy in MediaLab is "not great". Could you provide some more quantitatiive estimate of "not great"? 100 millisecond accuracy? 10 ms accuracy? 1 s accuracy? 5 s accuracy?

    I...
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    Turns out that using a .html file with BackImage...

    Turns out that using a .html file with BackImage (as documented) does pretty much what I wanted to do with BackDoc. Still, it would be nice to clarifity what the BackDoc field does, or if that has...
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    Oh, in case it helps, this is with MediaLab...

    Oh, in case it helps, this is with MediaLab version 2008.1.11.
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    BackDoc?

    MediaLab .que files show a column (field) labeled "BackDoc". What exactly does this do? I ran a search for "BackDoc" on both the online Help and the .pdf manual and found nothing, and a search on...
  6. Thanks. I gave sampleinput2.csv a try, after I...

    Thanks. I gave sampleinput2.csv a try, after I made a couple slight revisions -- it had trouble with style 5, so I changed that to 1; and I do not have sound set up, so I had to delete the columns...
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    Just found this thread when doing a search for...

    Just found this thread when doing a search for "css". Looks like you might have made progress on this, at least when I look at the ml.styles.txt file in the Styles folder it sure looks like CSS...
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    I put this to the investigator, and she was very...

    I put this to the investigator, and she was very pleased with that solution, especially since then we could do the task plus questionnaires all in MediaLab without dropping into DirectRT. So I was...
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    OK, I stumbled across an example of a meta...

    OK, I stumbled across an example of a meta command here (http://www.empirisoft.com/Support/showthread.php?t=115&highlight=meta) and mention of a meta command sample here...
  10. For the record, it looks like this bug goes back...

    For the record, it looks like this bug goes back to at least 2006. Sorry I missed that in my ealier search, I just happened to stumble upon it today searching for other things. See...
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    rbg/rwg vs. bgr/wgr

    The DirectRt manual in my edition (2008.1) refers to RBG and RWG for Randomization Between Groups and Randomization Within Groups, respectively, and shows those columns as titled with "rbg" and "rwg"...
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    Thanks. Actually, once I looked back at...

    Thanks. Actually, once I looked back at DirectRT, I discovered that I can implement many randomization constraints by judicious use of input lists and rwg (or wgr). Of course I could do even more...
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    Thanks. I could ask the researchers, but that...

    Thanks. I could ask the researchers, but that may not fit their experimental design. However, I took another look at DirectRT and got this to work by combining stimulus lists with rwg (or wgr, as...
  14. No, they do not stay enabled once I enable them,...

    No, they do not stay enabled once I enable them, and they change only after the application is closed and then re-opened. I am using version 2010.1.101.0 under Vista in case it helps. Yes I know...
  15. Make Windowed Trials & Overwrite Warning persistent?

    How do I make the Tools > Windowed Trials and Overwrite Warning settings persist between sessions? I use one computer for development, and we use other computers for running subjects. During...
  16. Duplicating style colour (color for us Yanks)

    [Hmm, I thought I posted this here last night, I seem to be doing a lot of fumbling lately.]

    OK, I just want to add a style using the Style Editor, and I want that style to be exactly the same as...
  17. Input file key codes vs. data file Resp?

    Just curious -- the key codes used in input files do not seem to match up with the Resp codes reported in the data files, at least not for numbers. The Name column in the data file provides the...
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    Combining random subsets

    OK, I read through the manual and searched the forum and did not find an answer to this, so here goes...

    Sec. 5.17, p. 66 of my 2008.1 edition of the manual explains how to randomly present n of N...
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    Randomization with constraints

    Didn't find anything on this by searching the forum, so I hope I am not covering old ground...

    Does MediaLab (or DirectRT) have any way to do randomization with constraints? E.g., suppose I have...
  20. I am still thinking about this. As I understand...

    I am still thinking about this. As I understand from the manual (most of my knowledge of DirectRT comes from reading the manual rather than actual usage), all the stimuli for each trial are fully...
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    After all the glowing reports above, a note of...

    After all the glowing reports above, a note of dissent is in order. Let's see if Empirisoft dares to keep this in here.

    Shortcomings of DirectRT include:

    Cannot do loops. E.g., cannot repeat...
  22. Compressed vs. uncompressed image files

    You have already discussed in the User's Guide the the advantage of uncompressed over compressed image files, but I would like to know more. Sure, it takes extra processing to decompress compressed...
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    Thanks for the direct & frank answer. But...

    Thanks for the direct & frank answer. But doesn't DirectRT do disk I/O to read stimulus files during the ITI in order to prepare the next trial, without affecting performance during the trial? If...
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    Oops, that should be C:\Program Files. --...

    Oops, that should be C:\Program Files.

    -- David McFarlane, Professional Faultfinder (looking out for his own faults)
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    Thanks, I must have missed that step during...

    Thanks, I must have missed that step during installation since I just assume everything goes to C:\Progaram Files by default. I will look for this next time.

    -- David McFarlane, Professional...
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    LOL! Thanks. But your Canuck better look at the...

    LOL! Thanks. But your Canuck better look at the MediaLab User's Guide -- someone has been sneaking in the Yankee spellings over there.

    -- David McFarlane, Professional Faultfinder
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    Blank web pages

    Empirisoft Webmaster,

    About 20% of the time when I click a link on your web site I get a blank page. If I then do a reload on the blank page the requested page will appear. Have you ever noticed...
  28. In other words, you cannot do a loop in DirectRT....

    In other words, you cannot do a loop in DirectRT.

    (I added this comment to this thread just so that people like me who want to find out whether DirectRT can do loops can now find it by searching...
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    Why installed to C:\?

    [edited by moderator]

    I just installed MediaLab, and discovered that it got installed to C:\MediaLab. Is it possible to move the MediaLab application to a subfolder of C:\Program Files?
    ...
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    Documentation for meta commands?

    Where can I get documentation for the currently available meta commands (see User's Guide 8.16, p. 82)?

    Thanks,
    -- David McFarlane, Professional Faultfinder
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    British spellings?

    Isn't Empirisoft a US company located in New York City? So what's with all the British spellings (e.g, colour, favourite) in your materials? Just curious, I can't help noticing these sorts of...
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    Saving data in case of crash?

    Looking at the DirectRT output data files, I see that trial data are saved in the same order as in the input file. I don't see how DirectRT can do this unless it keeps all results in memory and then...
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    Source of Key Codes?

    I am reading through the DirectRT manual and did not find this answered there or here on the help forum... Where do those bizarre key codes in the table on p. 32 come from? They are not ASCII...
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    Thanks. Um, that e-mail address & link doesn't...

    Thanks. Um, that e-mail address & link doesn't work. Don't you mean sales@empirisoft.com?

    -- David McFarlane, Professional Faultfinder
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    DirectRT on Vista

    Ran a quick search on the support forum and did not see this answered...

    OK, DirectRT has not yet been revised for Vista (although a beta seems to be available, but I'm still waiting on that). ...
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