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Linear mixed effects models 

Matthew E. Clapham
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When to choose mixed-effects models, how to determine fixed effects vs. random effects, and nested vs. crossed sampling designs. Requirements and assumptions of mixed-effects models, and how to evaluate them. How mixed-effects models can improve parameter estimation with partial pooling/shrinkage.

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7 авг 2024

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Комментарии : 49   
@fiore1394
@fiore1394 9 месяцев назад
Oh my goodness, thankyou for making a video that actually explains statistical content clearly! If I had a dollar for every video with a title like, "such and such analysis method, CLEARLY EXPLAINED!" then goes on to dive into the most complex content imaginable without proper explanation I'd be a very rich man. Sorry about this vent, I'm just very appreciative. Keep up the good work.
@animamundii
@animamundii 3 года назад
By far the best explanation on LMM. Thanks
@nicolasmellalopez3684
@nicolasmellalopez3684 2 года назад
Great explanation man, I really appreciate the effort! Although there is a lot of information available and also a lot of sources where to find them, it takes a lot of effort to explain these kind of models graphically. I've read about these models from 2 or 3 different sources in order to get a general picture, but this one is a nice and clear explanation, besides been shown as figures
@zheyuanpei5543
@zheyuanpei5543 Год назад
I am new to this model and I have to say that this video is really helpful! Thanks!
@muffinsniper
@muffinsniper 3 года назад
Studying psychology and this was super helpful!! Thanks
@Maicolacola
@Maicolacola 3 года назад
This was incredibly helpful. Thank you!
@kersting1712
@kersting1712 Год назад
this is the best explanation I saw so far! thank you so much!
@huijunzhao9822
@huijunzhao9822 12 дней назад
Thank you for sharing this complete explanation of LMEM! Super helpful!
@gisellechuwen2236
@gisellechuwen2236 2 года назад
thank you so much! this is so helpful and you are great at explaining.
@gavinaustin4474
@gavinaustin4474 4 года назад
Thanks Matthew. Very good explanation.
@sean_gruber
@sean_gruber 3 года назад
Great video, thanks!! Just enough information to get me started without going into full-blown detail.
@amalnasir9940
@amalnasir9940 2 года назад
Thank you sir! Even with this simple explanation the topic is still complicated. I wished the examples were simpler.
@mallorythomas725
@mallorythomas725 Год назад
Really good explanation! Helping me write my first manuscript :)
@srishtigureja6534
@srishtigureja6534 2 года назад
This was really helpful. Saved my day!!
@ernstpaulswens
@ernstpaulswens 3 года назад
thanks! very clear visualisations
@multitaskprueba1
@multitaskprueba1 Год назад
Fantastic video! Thank you so much! You are the best!
@stevenash2869
@stevenash2869 Год назад
The bext explanation I've found, thank you!
@rohanshinkre
@rohanshinkre 3 года назад
Sir thank u so much 😊 best explanation period
@DeepakChaudhary-oj6ot
@DeepakChaudhary-oj6ot 5 дней назад
This the man part of the linear in tha potential formation in my he please farmive
@lintonfreund
@lintonfreund 2 месяца назад
this video is incredible, thank you so much!
@jcmt8178
@jcmt8178 3 года назад
Thanks Matthew. In a longitudinal design, let's say 5 Time Points, 20 subjects what would be the optimal way to set up the random effects? I feel like whenever I include the intercept or any interaction with tie TIME POINT factor it explains almost all variance in the dependent variable (as it changes from time point to time point, but I want to study the effects of the independent variables changing over time on the dependent variable). Should I just ignore the TIME POINT (or "visit "1, 2, 3 4, 5) factor, as it's implicitly related to the values both in the dependent and independent variables? And just include the "SUBJECT" as a repeated measures account?
@marco.miglionico
@marco.miglionico Год назад
Great video
@user-mh7px2uy1k
@user-mh7px2uy1k 8 месяцев назад
Excellent work
@bezaeshetu5454
@bezaeshetu5454 4 года назад
nice explanation. Thank you for posting. Can you share some materials on GLMM please? Thank you so much it really helps.
@y37chung
@y37chung 4 года назад
Great video. I have a question, what would make more sense to be used for accounting inherent agricultural field variability (having spatially separated block on a larger field)? A fixed or random effect?
@francycharuto
@francycharuto 3 года назад
Random
@driouechehocine535
@driouechehocine535 2 года назад
Hello and thank you for the video I would like to use GLMM multinomial logistic regression mixed model for repeated data with R software, response ~ trt + period + seqTrt + (1|id) do you know a package or a function for this model thank you in advance
@milanfilipovic3648
@milanfilipovic3648 3 года назад
how is partial pooling or shrinkage model different then running a fixed effect model on that subset of observations?
@JinaneJouni
@JinaneJouni 2 года назад
Can someone help me to do the plot where we visualize the lines with different intercept and slope? I'm using Rstudio
@will74lsn
@will74lsn 3 месяца назад
can I find somewhere examples of random coefficient models where the variable of the random coefficient is not continuous but categorical? ideally written with STATA or SPSS?
@Jillllllllll
@Jillllllllll Месяц назад
SUPER nice!! one question, i have a LMM with df what do they mean?
@chacmool2581
@chacmool2581 Год назад
Country X has 30 states with repeated observation measures of X across 15 years for each state. Is Mixed Effects appropriate to model Y from X with states as random effects?
@divyaagrawal6740
@divyaagrawal6740 Год назад
if I have the more than 3 datasets with different x and y axis then how statistically it can be compared??
@maxgav13
@maxgav13 4 года назад
Thanks! Great explanation and summary. I wanted to ask if there's a source (paper, book, books) you could point to for this topic? Thanks again
@madisonlong3182
@madisonlong3182 3 года назад
Just to update anyone else who comes looking for a citation, the manuscript Naseem linked was recently published in Advances in Methods and Practices in Psychological Science! journals.sagepub.com/doi/10.1177/2515245920960351
@ericdoe1129
@ericdoe1129 3 года назад
Great
@ufoisback5088
@ufoisback5088 3 года назад
The R code for all this stuff would be great
@ghadaelkhawaga7081
@ghadaelkhawaga7081 2 года назад
How can I write a comment on mixed linear model plz
@a.s.3874
@a.s.3874 4 месяца назад
Are LMM and LMEM the same thing?
@ViriatoII
@ViriatoII 3 года назад
Awsome explanation. But wait, I just can't get p-values? How do I know which fixed effects are relevant?
@MatthewEClapham
@MatthewEClapham 3 года назад
It may depend on the program you're using, but the authors of the lmer function (lme4 package in R) chose not to give p values. However, there are standard errors for each coefficient and you can get the 95% confidence interval on each fixed effect by running the confint() function on the model output.
@marinadh4402
@marinadh4402 3 года назад
how to add the fixed effect: shape, in the formula for nested random effect please?
@binjieli7971
@binjieli7971 Месяц назад
where is gray and green?? Am I color blind
@statisticsappliedmathemati810
@statisticsappliedmathemati810 3 года назад
can we make a collab video?
@danparish1344
@danparish1344 Год назад
Did you get that collab?
@danhelll8768
@danhelll8768 3 года назад
it was great up until like 16:12 when suddenly randoms graphs from god knows where
@Breizh1999
@Breizh1999 8 месяцев назад
6:45
@andrewchen7342
@andrewchen7342 2 года назад
Terrible explanation, just making a simple concept become ultra complex.
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