RE: web study has very small ratio of people that seem to be able to do it

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web study has very small ratio of people that seem to be able to do it

web study has very small ratio of people that seem to be able to do it...

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audiosophy	audiosophy posted 9 Years Ago HOT Topic Details Share Topic
Group: Forum Members Posts: 62, Visits: 212	Hi, As someone who helped convince my department to get a perpetual license of Inquisit web, I am rather alarmed that for my first web study (which I have designed) I have had 13 participants logged as trying to do the study, but it is only showing 3 participants worth of data. I have tried contacting various participants as to why it failed. Although a couple said that they didn't want to download the plugin, others have said they did but that it wouldn't work for them (without being that specific although a couple said they downloaded the plug-in but it still doesn't work). I have tested it as working on my laptop (2014 mac book pro and some pcs) Can you please help me to understand why so few people are able to do it? My study is here: https://www.sussex.ac.uk/psychology/stell/1.php that link itself redirects to these three conditions: http://research.millisecond.com/astell/BatchFIleweb.web?group=1 http://research.millisecond.com/astell/BatchFIleweb.web?group=2 http://research.millisecond.com/astell/BatchFIleweb.web?group=3 Thanks in advance, Xander
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Dave	Dave posted 9 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	Your study is using an outdated Inquisit Web version (4.0.6.0). Since that version was released, several things have happened. Most significantly, Google has removed any and all support for NPAPI plugins from their Chrome browser. That affects both Inquisit native NPAPI plugin as well as the JavaWebStart launch method (since Java itself is an NPAPI plugin). Chrome will happily install the plugin but it will refuse to run it. https://www.chromium.org/developers/npapi-deprecation https://java.com/en/download/faq/chrome.xml For that reason, there is another launch method available in current Inquisit Web versions, the Web Player. Update your web experiment to use at least version 4.0.8.0 and make sure the Web Player is selected as one of the available launch technologies. Both of those things are done via your web experiment's settings.
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audiosophy	audiosophy posted 9 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 62, Visits: 212	Wow - reply on a sunday - your a legend Dave :) I will test this and see how we get on. Thanks again.
	Reply Like 73
audiosophy	audiosophy posted 9 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 62, Visits: 212	Ok yesterday after your recommendations I changed the version of Inquisit web to 4.0.8.0. Although I have only had 2 sign-ups today, neither of them have been able to get through the study. My participant has claimed the following "I downloaded the programme and it kept freezing at a certain point, saying error with the software." I am trying to press for more details but I was wondering if you had any other ideas?
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Dave	Dave posted 9 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	Freezing or a crashing would usually be due to some mistake in the script(s) you are running. Hard to tell without additional details. Have you been able to reproduce this yourself?
	Reply Like 78
Dave	Dave posted 9 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	Another, unrelated thing that's problematic with your script(s) is that you use a MOV video at some point. That'll work fine on Macs, but support for that format under Windows is sketchy. I'd recommend either switching to a different format (one equally well supported across platforms, such as MPEG-2) or administering different formats to participants on Macs (MOV) vs. participants using Windows (e.g. WMV). You'll find that covered in the documentation for the <video> element and the topic on conditional <include> elements. Other code examples can be found on the forum, e.g. here: https://www.millisecond.com/forums/FindPost9931.aspx
	Reply Like 59
audiosophy	audiosophy posted 9 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 62, Visits: 212	I changed the video to mpg and now, although the mpg plays fine from quicktime, I am just seeing a black screen where the video should be when the study is run?
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Dave	Dave posted 9 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	#1: Under OSX, Windows or both? #2: Black screen would normally indicate there's no suitable codec to render the video stream. Something might have gone wrong when transcoding the file. #3: Alternatively, explore the different formats for different platforms option.
	Reply Like 65
audiosophy	audiosophy posted 9 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 62, Visits: 212	So I have replaced the video elements with text and now there are a few more participants coming through. However, they all seem to coming through on condition 1, despite entering the study from a link that sequentially selects 1 of 3 conditions. Whilst I thought it could have been something to do with the link, I noticed that when I tested it to go to condition 2 (the link works fine for me), when my test data came through, I noticed it had recorded the build on that run as 4.0.6.0? Is there a chance some conditions are set as using 4.0.8.0 and some conditions are set as 4.0.6.0? And then that would explain why when participants are assigned to the other conditions I am not getting their data? If so, how can I insure all my conditions are using the 4.0.8.0 build Here is the link: https://www.sussex.ac.uk/psychology/stell/1.php
	Reply Like 57
Dave	Dave posted 9 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	> Is there a chance some conditions are set as using 4.0.8.0 and some conditions are set as 4.0.6.0? No. If you have 4.0.8.0 installed, that's what will be used. There actually would be no way to have different conditions use different versions. The only way that would be possible is using three separate web experiments, each with its individual launch page.
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