1. 
   Carryover effect
   The carryover effect occurs when two experimental conditions are applied to the same sample or participant, and the effect of the first condition "carries over" to the second. Examples include the effect of practice or fatigue in experimental subjects. G Nahler, Dictionary of Pharmaceutical Medicin...
   Found op http://en.wikipedia.org/wiki/Carryover_effect
   
   
2. 
   Carryover effect
   This is a problem encountered in crossover trials. Sometimes the influence of the first treatment carries over when the second treatment is applied. Avoid this by having a long enough washout period before crossing over. The carryover effect makes crossover trials inappropriate for some disciplines....
   Found op http://www.conceptstew.co.uk/PAGES/s4t_glossary_C.html
   
   

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