[SRD] 3-monitor booth studies
This page describes how to run a 3-monitor HPP study in our lab (written by SD for the SRD study specifically).
Last updated
This page describes how to run a 3-monitor HPP study in our lab (written by SD for the SRD study specifically).
Last updated
Turn the computer and all 3 monitors on.
Open Habit.
You need to set the computer up to run the specific study.
Open Preferences.
Next, set the "Monitor assignments" to the correct monitors.
"Control" should always be monitor 0.
The other monitors may change! "Single stimulus" should be the large TV. "Dual stimulus" should be the left and right monitors, respectively.
If you're not sure, you can choose "Identify Monitors" which will make a pop-up window appear on each monitor labeling it. Hit Enter on the keyboard to advance through each monitor.
Next, you need to test the study.
Select the study you're running and click the "Run" symbol.
On the next screen, enter "Test" for the subject ID and your initials for observer. Select "default order" for both orders.
Make sure the study is running properly!
SRD: The attention-getter (smiley face) should appear on/play from the center TV. The checkerboard and audio stimuli should appear on/play from the side monitors (one at a time, alternating sides).
Listen to the auditory stimuli to make sure they're coming from the correct sides, i.e. the same monitor the visual stimulus is on.
Turn on the GoPro and make sure that it has enough memory and battery life, and that it's set up properly to stream a good image to the monitor outside the booth.
Make sure the chair is lined up correctly with the tape on the floor.
Turn the booth fan fully off and turn the lights on, dimmer all the way down.
Check that the monitors are set up correctly.
In Habit, select the study and click Run.
Enter the subject ID and your initials, and select the appropriate order.
SRD: "Default Order" for Prac Phase; Order1 or Order2 for Test Phase.
Test phase information can be found in the Participant Notes sheet on the Desktop.
When the family is ready in the waiting room, explain the procedure to the parent.
RAs: Complete the lab visit as usual.
Experimenters:
Greet the family and make sure they've filled out the relevant paperwork (consent, demographics, babbling/feeding, vocab exposure, CDI).
Consent and vocab exposure must be completed before the study. All other paperwork can be done after if necessary.
Explain the procedure to the parent:
"During this study, your job is to be a really comfortable chair for your child. We will go into a sound proof booth, and you will sit in a chair with your child on your lap. You'll see three monitors. We'll show your child some pictures and play him/her some sounds.
During the study, we are interested in what your child is interested in attending to, so there is no need to direct their attention. If they are not interested in what is on the screen, that tells us something too. That being said, we ask that you try to keep your child facing forward as much as possible. If they need a hug or a kiss, feel free to do that and then turn them back around so they can see what is on the screen if they want to. During the study, you will be wearing headphones and listening to some music, so you are not hearing exactly what your child is and you can't subconsciously influence what he/she is interested in. The whole study only lasts about 2-3 minutes. I can see what is going on inside the booth (via a camera), but I can't hear anything, so if you think your child is totally done, or you'd like to stop for any reason, please wave your hand or stand up and walk out of the booth. We get data from any part of the experiment, so it's no problem if your child doesn't like it or wants to stop. Do you have any questions?"
If parents ask what the study is about, tell them that generally we are interested in what kids know about words, but that we will tell them a lot more about the study after it's done.
Bring parents into the room and have them sit in the chair.
Remind the parents (as much as you need to):
Try to keep your child centered/facing forward
It's fine if they're fussy, don't direct their attention
It only takes 2-3 minutes, you can just wave or get up and leave if you want to stop at any time
Play the masking music on the iPod and put the headphones on the parent.
Turn on the GoPro and start the recording.
Leave the booth and close the door, making sure you can't hear anything from inside the booth.
Run the study!
Click "Start Trials" to begin the experiment.
Click space to advance from the attention-getter when they look at it.
Code only the target monitor on/off. That is. code "Look left" only when the child is looking at the left monitor with the target stimulus. Don't code if they look at any non-target monitors.
Looks Right = 6 on the keyboard
Looks Left = 4 on the keyboard
When the study is done, enter the booth. Take the headphones off the parent, stop the iPod, and stop the GoPro recording.
As you walk back to the waiting room, debrief and thank the parent!
"That was great! In this study, we're interested in kids know how words are related to each other. Some words kids know are similar in meaning (like foot and hand– both body parts), while others aren't related in meaning (like bottle and car). We have some evidence from previous studies that babies do know how words are related to each other, but those studies showed babies pictures of the objects. Related words like foot and hand tend to look similar in addition to meaning something similar, so we can't tell if those effects were just from the pictures. So in this study, we're asking if babies know how words themselves are related to each other, without seeing any pictures. So they heard pairs of related words on some trials, and pairs of unrelated words on others."
After you bring the parents back to the waiting room, fill out the Participant Info sheet.
