- Javier Miguelena added an answer:ANCOVA or repeated measures ANOVA?
- Andrew Ekstrom added an answer:Any suggestion about using ANCOVA with repeated measures?
- Roshanak Soltani added an answer:When can I use ANCOVA?
- Roshanak Soltani added an answer:What is the exact name of my test in spss?
- Bruce Weaver added an answer:Can one use multiple logistic regression to estimate possible confounding effect?
- Emir Veledar added an answer:How can you compare two groups that are initially distinct in two moments of time?
- Simona Katholnig asked a question:What does it mean if a covariate turns the effect of an IV on DV from significant to insignificant in an ANCOVA?
- Juan Mielgo-Ayuso asked a question:ANCOVA for repeated measures
- John A. E. Anderson added an answer:Does anyone have suggestions for reporting a robust ANCOVA?

My experiments was mainly a split-plot design with water treatment as the main factor. Measurements were taken in 6 harvests from Dec 2012 to May 2013. In Dec, all plots under irrigation; from Jan to March, half plots under irrigation and the other half withholding water; from Apr to May, all plots under irrigation. In each harvest, plants were defoliated after other measurements were taken. I do not know whether I should do an ANCOVA with measurements in the first harvest as covariates, or do a repeated measures ANOVA?