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| randomizing blocks and response choice display |
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Posted by: kolenorberg - 08-21-2023, 02:59 PM - Forum: Study Grammar & Management
- Replies (4)
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I have a study with three passages which fall in one of 4 conditions. I want participants to see each passage in one of the conditions but I want whether or not they receive all conditions across passages to vary randomly. Something like the below code which doesn't seem to work. How can I accomplish something like this? Specifying a condition for all possible combinations here is a little unwieldy and wouldn't replicate a prior experiment well.
"block_sequence": [{"$randomize":[
{
"A_C": ["A_full_control"],
"A_E": ["A_only_easy"],
"A_H": ["A_only_hard"],
"A_HE": ["A_full_manip"]
},
{
"C_C": ["C_full_control"],
"C_E": ["C_only_easy"],
"C_H": ["C_only_hard"],
"C_HE": ["C_full_manip"]
},
{
"D_C": ["D_full_control"],
"D_E": ["D_only_easy"],
"D_H": ["D_only_hard"],
"D_HE": ["D_full_manip"]
}]}
The other issue I'm having is more minor, but I'd like to have a passage and a comprehension question with answer choices on the same page. I want the passage below the question but that means I need to get the choice to appear between the two stimuli. Is there a way to do that?
Thank you
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| 2023 Fall Study Grammar Update |
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Posted by: Ting - 08-12-2023, 10:28 AM - Forum: New Study Grammar Features
- No Replies
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Dear Researchers,
The 2023 Fall Study Grammar Update is almost here! This update contains quite a few new features and improvements that we are really excited about!
Please note:
- Do you use the Keypress Response type? If so, please pay special attention to item #1, as it may affect any scripts you have for processing reaction time data.
- As always, you MUST preview your study in full to update to the latest grammar version in order to use these features.
FindingFive servers (US and EU, in their respective local times) will be updated on the early morning of August 14, 2023 to include the following changes:
1. Reaction time data for Keypress Responses now calculated from previous keypress!
Previously, reaction time data for all keypresses recorded in a Keypress Response were calculated from the onset of the response (when the response is rendered on the trial). Based on feedback, we have decided to instead calculate the reaction time of each successive keypress relative to the preceding keypress, with the first keypress reaction time calculated from response onset.
In other words, if a participant were to strike a key every 500ms, the old reaction time data would look like this: 500, 1000, 1500, etc. It will now look like this: 500, 500, 500, etc.
2. Choice Responses now support dropdown selection!
It is now possible to organize the options of a choice response in a dropdown menu by setting the “mode” property to “dropdown”. Dropdown mode supports feedback and resetting of the choice response, but does not presently support the “multi_select” parameter (this will be made available in a future release).
A big thank you to Dr. Ming Xiang of University of Chicago for requesting this feature!
3. Tokenized Text Stimuli now support bidirectional self-paced reading!
It is now possible for participants to move both forward and backward through tokenized text stimuli. Simply set the new “bidirectional” property to true. This feature is particularly useful for backward-masked and singleton self-paced reading setups.
Please note: This feature is only possible if “self_paced” is set to true. In addition, please see the new “key_reverse” property which supplements the “key_advance” property to support custom key bindings.
A big thank you to Dr. Jeffery Green of BYU Dept. of Linguistics for requesting this feature!
4. Changes to Tokenized Text Stimulus instructions
With the addition of bidirectional tokenized text stimuli, we are deprecating the old “key_advance_instruction” property in favor of a new “hint” property. This aligns key advance instructions across tokenized text and audio stimuli.
Please note: Studies employing the old property should continue to work for now, but we do not actively support deprecated features.
5. A bug fix affecting the recording of Response Mode in the results CSV
A bug affecting how “response_mode” was recorded in the results.csv file of a completed session or study preview from grammar version 3.5.0 has been fixed. The response mode is now correctly recorded.
Questions?
If you have any questions regarding this grammar update, please leave your comments below. Thanks!
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| Multiple stims on trial but presented sequentially |
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Posted by: atfrederiksen - 08-11-2023, 05:09 PM - Forum: Study Grammar & Management
- Replies (2)
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I would like to present videos in different length sequences. That is, on one trial, participants see one video before they respond. In another, they see 2 or 3 or 4 before responding. I tried grouping the vide stimuli within the trial template (e.g., [[vid 1, vid 2], [vid 3, vid 4, vid 5]], but then the first video stays visible when the next starts to play, which I would like to avoid. What other ways are there of achieving this?
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| Image overlay onto the another image |
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Posted by: sykim21 - 08-10-2023, 04:25 AM - Forum: Study Grammar & Management
- Replies (3)
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Hello,
I am trying to show image stimuli(i.e. a big scene image) that are superimposed by another image(i.e. smaller face image) in each trial.
Since I am planning to randomize scene-face pairs, making superimposed images in advance and uploading those images may not be available.
Could you suggest any useful grammar or method for this?
Thanks,
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| Experiment Won't Show Images |
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Posted by: NateHHeller - 08-05-2023, 03:20 PM - Forum: Study Grammar & Management
- Replies (8)
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An experiment that was working 5 months ago (when last I tried to run it) is now freezing at the first block of trials. The instruction page is presented correctly, but when it moves on to the section when stimulus images are to be presented, nothing happens.
This study was working perfectly fine 5 months ago. Any ideas what might have changed?
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| random item selection |
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Posted by: ytgu - 06-20-2023, 06:37 PM - Forum: Study Grammar & Management
- Replies (4)
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Hi!
I wonder if FF allows us to randomly select from a pool of sentences and administer them to each subject?
For example, for Block A & Block B, we have 36 items in total, and we'd like the program to randomly administer 12 sentences (6 go to Block A, 6 go to Block B, and we don't want repetition within these randomly chosen 12 sentences).
Please let me know if any of this doesn't make sense to you!
Thank you so much,
Yuting
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| reaction time logged between visual target and the key press |
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Posted by: ytgu - 05-30-2023, 10:56 PM - Forum: Study Grammar & Management
- Replies (6)
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Hi Ting,
For my study, participants first listen to an audio sentence, at the offset of the sentence, a visual target will appear on the screen, participants need to press a key to indicate if the visual target and the final word of the heard audio sentence is a match or mismatch.
When I looked at the data, I found that the actual RTs should equal to "trial_duration" minus the length of the audio file but not the values in the column "response_rt". Is there a way to directly log the actual RTs that I want onto the FF results spreadsheet?
Thank you!
Yuting
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