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Messages - BabyScientist

#1
HO / Re: Simple Train for Infant Research Study
November 08, 2023, 02:46:01 PM
Thank you all for your input!  I have definitely learned a lot these past few weeks.

I have the original train box with lever (as seen in the pictures) and I verified the measurement. The diameter (as measured from the interior portions of the circle/track) is 18.7 inches (47.5 cm), making the radius 9.35 inches.  I have also verified that the gauge of the tracks is standard HO size.

Is there any sort of resource that states which HO-scale locomotives, cars, caboose, etc. handle tighter radii better than others?  I've been searching online; I found this youtube video https://www.youtube.com/watch?v=JKGaw3Wfamw of a minimum radius test track, but I went to the website and emailed them to see if there was a spreadsheet with testing information, with no luck.  Essentially I am looking for cars/locomotives that aren't too long, but any other suggestions of what to avoid or try are welcome.  Is there a resource that compares the length of different cars/locomotives/etc.?

I will definitely look into the leads here about which potential trains were used in these photos from 20 years+ ago.  We are aiming to use the same parameters as already be used in research--so that is the challenge that we are working with.  It might just involve a lot of trial and error in determining what will work for our purposes!

I really appreciate you all taking time to read and share your ideas!
#2
HO / Simple Train for Infant Research Study
November 02, 2023, 09:21:37 PM
Hello Everyone:

I study infant learning and I am reaching out for help in recreating a train set from research done 20+ years ago. 

Essentially an HO-scale train consisting of an engine and three brightly colored railcars went around a circular track (47.5 cm diameter).  I am trying to find HO-scale engine and railcars that are small enough in length that they can seamlessly go in a circle with such a small diameter.  I am having a hard time finding out the dimensions of engines and cars included in sets, etc.

Any help would be greatly appreciated!  Thank you for your time.

I have included links to 2 image below but if you use google images "operant train task" you can find more.


Pic1
https://drive.google.com/file/d/1MzxjsaxCSutxbSQe0f83jm5POIy75tAb/view?usp=sharing

Pic2
https://drive.google.com/file/d/18SOeIKmGDqgS9dvr6rEm75KK3IZLWwiv/view?usp=sharing