Two-level multilevel model using SPSS (chapter 3 v1)

This is the first of several videos illustrating how to carry out multilevel modeling involving two levels.

[RuaTheRapoet]

Classic statistics video comment template: [gracious thank you for the content in the video, claiming it was all learned successfully], followed by [specific question that usually could be answered by the commenter with some diving into it solo, but that they want you to give them a quick solution for]

[tingtingzhang]

Thank you for all helpful videos! I really learned a lot. When I was running multilevel modeling with my data, I got an error message "The final Hessian matrix is not positive definite although all convergence criteria are satisfied. The MIXED procedure continues despite this warning. Validity of subsequent results cannot be ascertained." Can I ask whether any of your videos covers the reason for this error? Thank you again!

[julia]

Is there an approximate number & lower of level 2 units where you would recommend using REML instead of ML? Also thank you for your videos, they are extremely helpful! :)

[jennifersweeney]

Hi Mike,
This is really great and so useful as I'm learning MLM. In this video when you are conducting the regression model you refer to centering, is this group mean centering or grand mean centering?
Many thanks in advance

[aparnasm]

Thank you so much sir.. for detailed explanation. It is really helpful. I am using HLM for my study and I was wondering whether we should perform model fit analysis (CFA)for multi-level models. If yes.. kindly give more insights or suggest some materials, sir.

[martamamyan]

Hello Mike, thanks a lot for the videos, they are really helpful. I have a question related to my data structure and the right methods to use with it. I am not interested in time trends, but I want to measure the effect of a country-level variable on an individual's probability to do something by taking advantage of using a bigger sample. My individuals are nested in 60 countries, and there are 2 time periods (2009 and 2015, but not all the countries are measured during both time periods and the individuals are not the same). When I run a multilevel model separately in time periods (one for 2009, another one for 2015), the results of my country-level variables seem logical and something that I would expect to receive but when I combine the two waves and add the year as a control variable in the multilevel model, the direction of my country-level variable changes (the coefficient becomes negative instead of being positive). Is this because I need to add the time variable as a level so that my time variable is my 1st level and the second block is the interaction of country and time?


Thanks a lot in advance!

[suzanneyanney]

Thank you for these helpful and informative videos! I was wondering what to do if the null hypothesis test comes back as non-significant for the level 2 variable? Am I right in thinking that this suggests that the variance in dependent variable is related to individual/level 1 predictors and not level 2 predictors, and therefore a multilevel model may not be the appropriate test for the second level with predictors of the dependent variable?

[matildablicher-hansen]

Thanks for this! It is really clear. I am early in my MLM learning, and wondering whether this would work for n-of-1 - multiple observations within-person - with multiple predictor variables?

[brittjane]

Hi Mike - just wondering if you have the slides for this series? I tried all the links but they don't work, probably because an old video. Thanks so much - I find MLM so hard to get my head around!

[maxwelldapaah]

Hi Mike, is it possible to do a hierarchical regression with fixed effects in SPSS? Will appreciate your thoughts or link to any videos you may have on this subject. I am working on testing the improvement or otherwise that occurs in health outcome x when you add two predictors (financial autonomy and accountability) to a first predictor (domestic government expenditure) in a panel data involving 39 countries over 15 years. I wanted to hold the country and/or year codes as fixed. Thanks

[ericnovotny]

Hello, thanks for the video. I did everything similar to you but got the error "The final Hessian matrix is not positive definite although all convergence criteria are satisfied. The MIXED procedure continues despite this warning. Validity of subsequent results cannot be ascertained." and "This covariance parameter is redundant. The test statistic and confidence interval cannot be computed." What can I do?

[footballsailors]

Thank you for what you are doing. I appreciate. I wish if you author a book.

[farnazmarianoshokrifard]

Can I do Multilevel nested model analysis on SPSS software when I don't have continuous variables?

[olgamolina]

Thanks for your kind tutorial! Could you please update the excel files links for generating plots? I wasn't able to download them :(

[ninjasrini]

It will be really useful if you show the code. Thank you.

[akpashtoon]

Hi dear Mike, can you please send me the power point slide that you are presenting in this video, it's quite informative. Thanking you in anticipation !

[oksaubercool]

You dont use the student ID for the random effects. I wonder if you could click in both the school ID and the student ID (as school*student) for the random intercept and would it make a difference?