Hello.

I need help to create a 3x3 factorial design with repeated measures.

General lines:

Soil samples to evaluate partial and total soil loss. Can I analyze both (partial - after each time measurement, and total soil loss - cumulative at last measurement) at same time or need different codes?

**1st scenario: **

Partial soil loss (DV) with repeated measurement

Factor 1 at 3 levels: soil stabilizer (S = IV1) = cement (Ce), lime (Li) or mechanical compaction (Mc)

Factor 2 at 3 levels: road grade (RG = IV2) = 2%, 4% or 8%

Samples: randomly receive one stabilizer and then randomly receives one road grade

Test: same sample will be under a constant test, where after each time measurement (1 minute, 5 min, 15 min, 25 min) the soil loss is collected.

Each combination of S & RG have 3 replicates. All samples are tested under all time measurements.

**2nt scenario: **

Total soil loss (DV) - no repeated measurement

Factor 1 at 3 levels: soil stabilizer (S = IV1) = cement (Ce), lime (Li) or mechanical compaction (Mc)

Factor 2 at 3 levels: road grade (RG = IV2) = 2%, 4% or 8%

Samples: randomly receive one stabilizer and then randomly receives one road grade

Test: same sample will be under a constant test, where the soil loss is collected at the time of 25 minutes (sum of all partial soil loss)

Each combination of S & RG have 3 replicates.

Can someone guide me to how to build these codes, to evaluate both scenarios?

Thank you so much, in advance.

Best regards, Carla