2 : material used to enclose or contain something â¦ the flashy packaging popularized by mass merchants. â Jan Stafford; also : a covering wrapper or container : 1package 3 the manufacture of food packagings.
experimental condition. n (Statistics) one of the distinct states of affairs or values of the independent variable for which the dependent variable is measured in order to carry out statistical tests or calculations, (Also called) condition.
Experimental research is conducted mostly in laboratories in the context of basic research. The principle advantage of experimental designs is that it provides the opportunity to identify cause-and-effect relationships. Non-experimental research, e.g., case studies, surveys, correlation studies, is non-manipulative observational research usually conducted in natural settings. While laboratory-controlled experimental studies tend to be higher in internal validity, non-experimental studies tend to be higher in external validity. One major limitation of experimental research is that studies are typically conducted in contrived or artificial laboratory settings. Results may not generalize or extrapolate to external settings. Two exceptions to this rule are natural experiments and field experiments.