err here's where you've lost me. I know slope can be carried out for regression because its based on a linear assumption. Not sure about ANOVA -my advice would be to google!
hi sneaks! its just this paper which I am reading says they calculated slopes for each day but didnt say how they did it. I'll have a look round google then. thanks :-) satchi
hi sneaks; yes its not regression; I've just figured it out, I think they used the maximum value (of the data) minus minimum divided by times of exposure; and not done with spss. Then after that compared this value for the days. :-) satchi