growth model

  1. R

    [R – lme function] Comparing curves in longitudinal data (growth curves)

    I think my problem is best solved by the use of multi-level models. However, I’d like to confirm if what I’m doing is right, and the use of the function is right too. I work with cells (biology), by doing electrophysiology. I apply to each cell a series of currents, in 20 pA steps, ranging from...
  2. B

    HLM-Longitudinal Analysis: Moderation in level 2 variables?

    Hi, I am creating a growth model using HLM 7 where Level 1 is Occasion and Level 2 is Person. I am trying to see if I can test the moderation effect of one level 2 variable on another level 2 variable (does propensity for excitation (L2) moderate the effect of mood (L2) on arousal over...
  3. S

    Growth Curve But Not Repeated Measures Analysis

    I woke up this morning realizing that repeated measures was incorrect but my revelation did not go as far as to what was. Here is my experiment: I had 7 groups of 3 varieties of seedlings (experiment repeated twice). After approximently a month I would take data on one group of seedlings...
  4. J

    Linear mixed model without random or repeated effects? GLMZ?

    Hi, I'm working on a dissertation, of which many chapters have longitudinal data and I've been using linear mixed models to estimate growth. I also have some non-longitudinal data (i.e. cross-sectional) that I'd like to estimate growth with in a similar way. The cross-sectional data spans a...