Hello!
This is my first experience with repeated measures ANOVA and mixed linear models. Since I did not found an example that uses a design similar to my experiment, I hope I can get some help. I collected 3 soil samples (SAMPLE_ID) in 4 areas (SITE), totaling 12 samples. My objective is to show the effect of a modified protocol (TREATMENT) for soil samples, considering the variability between the different areas. Thus, each sample from each area was submitted to the original protocol and to the modified protocol. I have been thinking of using the TREATMENT as a fixed factor and the SITE as random because although I have chosen my sites to cover various types of soils, I do not have as much interest in the sites themselves. However, I do not know how to write the model considering my repeated measures (SAMPLE_ID). I would appreciate any advice. If there is anything that I should clarify, please let me know! Thanks!
This is my first experience with repeated measures ANOVA and mixed linear models. Since I did not found an example that uses a design similar to my experiment, I hope I can get some help. I collected 3 soil samples (SAMPLE_ID) in 4 areas (SITE), totaling 12 samples. My objective is to show the effect of a modified protocol (TREATMENT) for soil samples, considering the variability between the different areas. Thus, each sample from each area was submitted to the original protocol and to the modified protocol. I have been thinking of using the TREATMENT as a fixed factor and the SITE as random because although I have chosen my sites to cover various types of soils, I do not have as much interest in the sites themselves. However, I do not know how to write the model considering my repeated measures (SAMPLE_ID). I would appreciate any advice. If there is anything that I should clarify, please let me know! Thanks!