Current and upcoming readings.
The hotlinks are to electronic
copies of papers in the ISU e-library. These are free if you access
them from on campus. A few are free from off campus. Please do not
pay for access to any of these! Instead, print it out the next time
you're on campus.
Week of Mar 31
- Repeated measures, concepts and details
Littell et al., Chapter 8, especially section 8.4 on use of proc
mixed. Skim or omit the mathematical details (e.g. 3rd paragraph on
p 282).
- Repeated Measures analysis using summary statistics:
Senn, Stevens, and Chaturvedi, 2000, Tutorial in Biostatistics. Repeated
measures in clinical trials: simple strategies for analysis using
summary measures. Statistics in Medicine 19:861-877. read
details on pp 861-863, 866(bottom) - 867(top), skim rest
Week of Apr 14
- Analysis of repeated experiments (e.g. multilocation studies):
McIntosh, 1983. Analysis of
combined experiments. Agronomy Journal
Presents F ratios for
various tests for fixed environments and for random environments.
Assumes you know whether env. is fixed or random.
- SAS for Analysis of repeated expts: Littell et al., read most of section
11.8, but skim 11.8.1 (no interaction, which is unlikely), omit
11.8.4 (location index models).
Week of Apr 21
- Incorporating baseline information:
Roberts and Torgerson, 1999, Understanding clinical trials: Baseline
imbalance in randomized clinical trials. British Medical Journal
319:185-186.
- ANCOVA or change scores: Cochran 1957 Analysis of covariance: its nature and uses. Biometrics 13:261-281.
Read pp 261-264, bottom of 269 and top of 270 (first part of
section 4), middle of 277 to middle of 278 (section 7). For the
rest, appreciate the value of computers.
- SAS for ANCOVA: Littell et al, Chapter 7, read sections 7.1-7.3,
skim 7.4 and 7.5, omit 7.6
Week of Apr 28, Practical advice:
- Dyke, G. 1997. How to avoid bad statistics. Field Crops
Research 51:165-187.
argues for clear thinking about the experiment and its goal(s),
appropriate statistical methods, and clear presentation of the
results.
- Riley, J. 2001. Presentation of statistical analysis.
Experimental
Agriculture. 37:115-123.
These are the recommendations of a statistical reviewer for a major
British Agronomy journal.