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4 views

Are these CFA models nested?

I am currently fitting and comparing models with ordinal DV. I want to test the following two models: 2factor <- f1 =~ item1 + item2 + item3 + item4 f2 =~ item5 + item6 + item7 3factor <- f1a ...
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21 views

How to test whether my models are nested or non-nested?

I have built two models (linear probabilty and logit) in order to decribe certain variable. How can figure out whether they are nested or not? UPD The idea that I am pursuing is to measure how ...
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1answer
34 views

How to specify a simple model in lmer/lme4: do I need explicit nesting?

I am measuring response time RT_log for 3 experimental manipulations (Conditions), and there are 4 ...
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1answer
18 views

Binomial test for nested data

I have 100 subjects who were scored on their performance in a series of trials (binary outcome for each trial: "hit" or "miss"). I want to find out whether overall there are more "hit" than "miss" ...
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1answer
21 views

Random effects, fixed effects, or perhaps nested fixed effects?

Simple question (I hope). I have the following experimental design: Two groups: A, B (let's say they represent the two sexes), where I randomly sampled 4 subjects from each group, and measured blood ...
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24 views

What analysis is appropriate for binary outcomes nested within individuals?

I'm working on my FYP & want to find out if my manipulation (condition: priming v.s. no priming) has any effect on distribution outcome (binary outcomes: 1-1 FAIR split; 2-0 UNFAIR split). Each ...
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0answers
14 views

Performing a 2-1-1 multilevel mediation in r

I'm interested in the relationships between the following three variables: religiosity, teleological explanations of daily events, and gratitude resulting from those events. I have collected data ...
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0answers
3 views

nested logit interpret coefs

how do I get the odds ratio from a coefficient of a nested logit. I know for multinomial logit, the exp of the coeff of a binary independent variable is the odds ratio. is that true for nested logit?
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31 views

Linear Mixed Model with 3 variables

I would appreciate some assistance with setting the statistical analyses of my experiment. During my experiment 14 participant's motor responses (ptp) were tested ...
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1answer
67 views

Crossed fixed effects model specification including nesting and repeated measures using glmm in R

Background: I am interested in looking at the effects that Culture, Treatment and Time ...
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0answers
20 views

Using nested CV

Of I use a nested CV for a especific dataset, can be possible a MSE selection (MSE obtain from the inner loop) be lower than the MSE assessment (MSE obtain from the outer loop using the model selected ...
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1answer
113 views

Nested random effects in lme4 R

Background: I have data on time to infection across multiple sites across a gradient. The design involves 2 latitudes (In and Out) with sites 1 and 2 nested within “In” and sites 3 and 4 nested within ...
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1answer
56 views

Interpretation of two glm model summaries

I am using the Titanic dataset to understand glm model. These are the two models, ...
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2answers
135 views

mixed effects and lme4: Do I need nesting?

I am analyzing data from a field experiment, and I am interested in the effects of fauna and altitude (fixed). Altitude has two levels, and at each site I have 5 blocks for the three levels of fauna ...
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0answers
25 views

How can you interpert the percent of variance explained by additional values with Nagelkerke's r^2

I have Nagelkerke's R^2 for two Poisson regression models, model A contains several predictors while model B contains all the predictors of A plus a couple extra. Would it be correct to say that the ...
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0answers
20 views

Trying to analyze a blocked, multilevel design with unbalanced, repeated measures

The research question(s): Do road crossings over streams influence the abundance of stream-dwelling salamanders (SDS)? Do these road crossings influence SDS abundances differently downstream than ...
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1answer
35 views

Why is this nested?

Is it fair to compare two models one with one of the predictors treated as a continuous variable and in the other, you treat it as categorical variable using ANOVA? Can we call the first model nested ...
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0answers
9 views

Syntax for unbalanced block design with nesting

I am trying to run a model in which I have site as a blocking factor, and two layers of nested random effects due to sub-sampling. The nesting layers are-> plant[flower[robbing status]]. My response ...
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0answers
20 views

help with lme() for nested random effects factors [duplicate]

this is a fairly basic question, but I have spent all day trying to figure it out (including reading other questions on this page), and I could really use some help. I am trying to run a simple mixed ...
2
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1answer
37 views

Nested Cross-Validation for fitting methods that use CV themselves

tl;dr: If I am using fitting methods that use CV to set their hyper-parameters, is nested CV actually 3 loops deep? Imagine you have two very simple OLS candidate models: $Y \sim X$ and $Y \sim X + ...
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1answer
56 views

Mixed model with partial nesting/partial repeating

Imagine this structure of data: Each row contains a value for: student_ID, class_ID, teacher_ID, student_Gender, teacher_Gender, submitted_Evalution The DV of interest is submitted_Evaluation, a ...
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0answers
27 views

Multilevel Analysis and Nested effects in lme4 package

I have a question regarding multilevel analysis and nested effect. I have an ordinal score from a single item questionnaire from each participants in line that I would like to correlate to the GINI by ...
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0answers
21 views

Fitting a nested model in SAS: maximum likelihood vs method of moments

I'm analyzing a nested design model in SAS (using proc mixed), but I'm not sure if I should be using restricted maximum ...
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0answers
11 views

How do I test for separate means in a small nested data set?

My observations are grouped into 3 groups, each of these 3 groups has 2 subgroups, I have 2 observations from each subgroup. Each group appears quite well divided from each other group, and each ...
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0answers
30 views

How to structure dataset and write syntax for mediation model with clustered data?

I have a dataset of 300+ students with teacher-reported data. There are 17 total teachers that reported data on the students. I would like to run a model that tests mediation where the mediator is a ...
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0answers
21 views

Correct specification of a nested mixed effect model in lmer

I have experiments where we tested 4 substances at different days. We have substance 1 tested 10 times at day 1, substance 1 tested 10 times at day 2, substance 2 tested 10 times at day 3, etc. We see ...
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1answer
24 views

Three stage nested design with one replicate runs out of degrees of freedom

I am trying to use a three stage nested design to do an analysis on incomes for different households. The data can be visualized as follows: ...
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0answers
31 views

Help with linear mixed model with nested factor

I would appreciate some assistance with setting the statistical analyses of my experiment with fish. The experiment was the following: Fish larvae of approximately the same weight from four different ...
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0answers
25 views

Coding two binary factors in a mixed model in a nested design

This is a hypothetical example but the idea is identical to the analysis I want to run. Imagine I’m exploring how diet and exercise influence weight loss. I have two factors: Diet (Yes/No) and ...
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2answers
616 views

How to interpret an ANOVA table comparing full vs reduced OLS models?

I found this online and it is a good example of the problem I am having. In a case like this I am unsure what the first line is referring to. It is saying there are 15 DF and the RSS is 8.18. Is ...
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0answers
26 views

how to model a repeated measures anova equivalent using lmer?

I am trying to compare means of reaction time scores for patients tested at time1 (pre-stimulation) and at time2 (post-stimulation). Also, within the stimulation paradigm, patients either received ...
0
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1answer
45 views

Nested fixed effects in a GLMM, hypothesis testing

I am attempting a GLMM with nested fixed effects. Most examples of nesting that I see deal with random effects, but my experimental design is hierarchical by nature and I am interested in making ...
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0answers
37 views

Paired design and building a GLM

I am blocking a bit on the choice of a model for my data. The study is applying 2 different stimuli (S1 and S2) on some animals. Each stimuli has two 'treatments': either 'on' or 'off' (off being the ...
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2answers
52 views

Double (nested,wrapper) CrossValidation - final trained model

I'm performing a study where I'm selecting kernel type and hyperparameters in an inner CV loop and an outer loop doing 10-fold CV (using SVR). The output is 10 trained models and performance measures. ...
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1answer
43 views

Using bootstrap for non independent measurements

I want to assess the statistical significance between the difference in the mean of two datasets D1 and D2. However, I each data set, the measurements aren't independent: one data set is the ...
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0answers
54 views

Nesting in mixed effect models

I am interested in how a response varies between time periods, and regions. My question revolves around nesting of random effects, specifically putting site (unique within each region) as a random ...
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0answers
22 views

Power calculations in R [duplicate]

I need to use R code to calculate the power of a Nested ANOVA. I want to detect a 3% difference between two consecutive tests between a stage in a process. The tests are identical and material has ...
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0answers
13 views

When nesting within two factors must the GLM contain their interaction?

I am running a general linear model with repeated measures - individual is a random factor, which should be nested within both treatment and family (also random). In the past, my statistics package ...
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0answers
52 views

Cox Time Series Data — Analysis of Interaction Terms

In a time series data set using Cox Proporational Hazard Rate, I am testing a model with interaction terms. I am worried that my interaction term is biased by several specifications of my model and I ...
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1answer
33 views

How to derive formula for marginal probability of choosing nest in nested logit model?

I am trying to understand all the details of the nested logit and what confuses me is the formula for marginal probability of choosing the nest. In more details: the joint probability of individual n ...
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0answers
28 views

Repeated measures mixed model with nested data

I have been trying to figure out how to run the stats I need for this study for weeks and despite reading endless amounts of information am not much the wiser! If anyone can help, I would be hugely ...
0
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1answer
50 views

Dependent questions in SPSS [closed]

I have questions in a survey that are dependent on other questions, i.e. nested questions. How do I enter those into SPSS? Example: ...
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1answer
73 views

Repeatability estimation using a mixed model with repeated measures by four raters

I am a medical doctor and definitely not an expert in statistics, although I think I do okay and I am familiar with R. I have discussed the following issue with a statistician but I am still not sure ...
3
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1answer
210 views

Repeated-measures linear mixed effect model

I have used a repeated-measures ANOVA in SPSS to analyse some of my data. It's the typical approach in my area, but I think it might be more appropriate to use a mixed effect model. However, I ...
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0answers
115 views

Stata nlogit and nlogitrum for the nested logit model.

In stata 12, do nlogit and nlogitrum estimate the same model. I understand before stata 10, nlogit estimates the non-normalized nested logit. That one is not consistent with utility maximization . In ...
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0answers
20 views

What will be the best test to determine the significance in this study?

The project does not have a simple design. It is planned as follows: It is a longitudinal observation during 120 days in 48 subjects (with repeated measures using multiple tests); The subjects were ...
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0answers
20 views

Nested ANOVA for species, genera, etc in R

I am wondering how to set up a nested ANOVA in R that will show me whether the greatest variance in genome size is found at the order, family, etc. level. My data would be in columns with the ...
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0answers
30 views

Weighted nls fit of multiple datasets with nested paramaters

I have a number of datasets that I'd like to fit with a model of the form a*(x+b)^c where b, c are common to each dataset with only the amplitude changing. I currently have this working in r, but I ...
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0answers
38 views

How to define random effects for nested LMM

I investigated the behaviour of 125 individuals in 25 groups of 5 individuals across 4 days. The data is structured as follows (only showing 2 dummy groups and 2 individuals in each group): ...
3
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1answer
62 views

The valid variance components to include in a generalizability theory model (anova) involving nesting? Are these correct interactions?

My question is about generalizability theory. A study by Bergeron, Floyd, McCormack, and Farmer (2008) is only adding to this confusion. Basically, in G-theory you want the first model you run to ...