Change associated with the passage of time per se is called maturation Changes participants undergo in an experiment that are due to maturation and not due to the treatment can threaten internal validity
Changes in subjects that take place during the experiment that are not related to the experiment but may affect their response to the experimental factor See also history
The maturation of something such as wine or cheese is the process of its being left for a time to become mature. The period of maturation is determined by the cellar master
(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level; "he proposed an indicator of osseous development in children"
The process of bringing, or of coming, to maturity; hence, specifically, the process of suppurating perfectly; the formation of pus or matter
Freshly-mixed Viscose cannot be spun immediately, but must age for a certain time at a certain temperature - "mature" The time and the temperature are important for the final condition, spinning maturity, and must be aadhered to precisely During the maturation period, the viscosity of the Viscose drops on the first day and in the followig days rises, first slowly, and then, after reaching spinning maturity, faster again The Viscose then goes into a gelatine-like condition At the same time as this physical change, a chemical one also takes place when the xanthate splits off carbon disulphide and the proportion of carbon disulphide to cellulose changes constantly
a mental evolution process enabling a person to see more and more human limitations and constraints that used to be invisible; a shift of mind-set from being eager to find out what-can-be-done to being more conscious of what-cannot-be-done
(medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus