Ethan McCormick's Avatar

Ethan McCormick

@emccormick.bsky.social

Asst Prof. in Methods & Stats. Study longitudinal quantitative methods, learning, development, neural networks. ๐Ÿณ๏ธโ€๐ŸŒˆ

1,266 Followers  |  91 Following  |  51 Posts  |  Joined: 19.09.2023  |  1.8419

Latest posts by emccormick.bsky.social on Bluesky

Jacobs Foundation Research Fellowship Program - Jacobs Foundation

Applications are open for the Jacobs Foundation fellowship program โ€” in addition to $$$ from Jacobs, new fellows also get to hang with the previous fellows, & we are fun

jacobsfoundation.smapply.org/prog/jacobs_...

25.11.2024 19:09 โ€” ๐Ÿ‘ 59    ๐Ÿ” 21    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 2

I can't tell if this is compliment or insult Daniel

21.11.2024 16:29 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Without being anti-prereg (I'm not), I think this is exactly what people are worried about, no? The thesis/dissertation process takes a year+ and people feel like they don't want to do that for every paper. Poor incentive alignment perhaps?

21.11.2024 16:28 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Just logged back on, so would appreciate being added. Thx

16.11.2024 21:48 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

10 hours of the full soundtrack of LotR

10.09.2024 16:32 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Profit

12.12.2023 15:31 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I mean honestly it would save me lots of time and worry haha

12.12.2023 15:22 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Level 5 is this
(From a paper a colleague reviewed; N = 11 btw)

12.12.2023 15:17 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Shameless self promotion but if you want an automated way to generate the expansions for SEM growth models, github.com/E-M-McCormic...

12.12.2023 15:04 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

๐Ÿ’™๐Ÿ’™๐Ÿ’™

11.12.2023 23:30 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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I also lay out an approach for estimating any nonlinear function as a linearized SEM through the use of Taylor series expansions. And so you don't have to do the math, I did it for you! With automatic {lavaan} syntax generation using the {leni} package function leni_sem().

11.12.2023 09:31 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Which let's you do all sorts of cool things, like test whether boys really are developmentally delayed compared with girls. Or using a multiphase version, to model puberty or cortical thinning.

11.12.2023 09:27 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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General approach is to define a set of transformations for a linear function to a corresponding set of nonlinear parameters that more closely match developmental features of interest. For instance, the timing of developmental transitions or the height of a quadratic peak. See a cubic example below.

11.12.2023 09:25 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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New paper+package combination for linear estimation with nonlinear inference (LENI) - methods to obtain the results of a nonlinear model without the hassle of nonlinear estimation. Presented this at Flux this fall and really excited to see it out!

osf.io/preprints/ps...
github.com/E-M-McCormic...

11.12.2023 09:20 โ€” ๐Ÿ‘ 25    ๐Ÿ” 10    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1

Agree with Ashley - they are a lot of fun. Lots of thoughts, so happy to message/email or chat/practice over zoom. Fingers crossed for you!

06.12.2023 00:23 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Exactly. And I need commitments around regular water delivery while Iโ€™m in meetings.

06.12.2023 00:21 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I now require 8 pubs minimum to consider an application - seems only fair because I have many myself now and I donโ€™t want a trainee to slow me down, you know?

05.12.2023 21:51 โ€” ๐Ÿ‘ 10    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

PhD vacancy to work with my better half at Leiden University (note - Dutch required because of testing) www.universiteitleiden.nl/vacatures/20...

03.12.2023 10:15 โ€” ๐Ÿ‘ 10    ๐Ÿ” 12    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Fair warning, maybe save it for a time youโ€™re not already a bit emotionally stressed. Like not between tough paper revision and grant admin hell (not at all a specific example lol)

03.12.2023 22:21 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I just finally got around to reading A Little Life. Definitely needed a big hug after, but so good if youโ€™ve not read it before

03.12.2023 22:19 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

A great visual but might be nice to highlight for people that the (eyeballing it) within-person slopes can be partialed out so within subject variance isnโ€™t inflated due to the trend. This of course generalized to other predictors but time trends are often treated with โ€œspecialโ€ consideration

03.12.2023 17:42 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Drop the reading list haha. I need more suggestions for the new year

03.12.2023 17:39 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Happy to chat over email e.m.mccormick@fsw.leidenuniv.nl if of interest

01.12.2023 16:05 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Are additional people being sought? Longitudinal methods is an area of interest for me and would like to see more of

01.12.2023 15:11 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Happy whamagedden to all who celebrate. I feel like the gays self-disqualify en masse with Mariah. People started posting her one minute after Oct 31

01.12.2023 06:41 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

If you figure out how to do that, can I pay you an enormous sum (or at least a sum) to teach me??

01.12.2023 06:38 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Come on, we arenโ€™t like that. We break it a fourth time and tell you that you should have learned better in grad school.

29.11.2023 23:46 โ€” ๐Ÿ‘ 7    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Post image 29.11.2023 23:44 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Is there a submission portal for these requests? And do we get to help (I can definitely write at least one sentence in 90 days - or pitch title ideas)?

29.11.2023 23:29 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Looks great - looking forward to reading it!

29.11.2023 23:27 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

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