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Old 03-18-2016
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Default sensitivity vs. specificity tradeoff

you may have seen the usmle biostats question that involves a graph with two histograms and a line (cut-off value) down the middle. the question then asks what happens to the sensitivity of the test if you shift the line to the left. well, if the answer isn't really clear to you, i explained it with the help of animations in this youtube video.... Sensitivity vs. Specificity

in addition to discussing what happens to the specificity and sensitivity when the threshold for a positive test changes, i discussed the significance of the overlap between the group of patients with the disease and the group without it. if you have any comments, please feel free to make them.... criticisms are appreciated.
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Last edited by Kruno; 04-09-2016 at 08:58 AM.
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Old 03-19-2016
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heres the youtube thumbnail for the video...



unfortunately the image is small, but you can get an idea. that yellow line is the cut-off level of the test and it shifts right to left.. and then back to right... meanwhile the white and red bars on the sides (which represent specificity and sensitivity), move accordingly. later on the two histograms move while the cut-off level stays in the same spot...
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Old 03-19-2016
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So are you Paul Bolin or the app creator or both?

It's obvious from your posts around here

The content is good but maybe you should be clear on letting others who read these posts and the site administrators know the nature of how these things are marketed, especially since you have in-app purchase.

I'm not saying you shouldn't be credited for the time and work but there should be transparency when posting across different usmle forums.
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Old 03-19-2016
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i dont know paul bolin or anything, but the videos are great so i recommend them to everyone. he has a lot of subscribers so im surprised that most people on this forum dont know about him. especially when you compare his material to the videos that ppl actually watch when preparing for the usmle. i wasted a lot of time studying material that i saw recommended on forums which didnt help (i.e., mtb, kaplan qbank, usmle consult, etc.). thats why i tell ppl what worked for me.

as for the app, i helped make it... i mentioned that in most of my posts about it. but i got bored of repeating that so i stopped. i didnt mention the app in this thread because of it. there is an in app purchase, but thats not going to me. these posts on the videos are just to let people know its up there.
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