Experimental research in a broad sense refers to a situation in which some condition or conditions are deliberately varied in order that the effect of this variation may be studied often testing specified hypotheses.
A research design that involves random assignment of study participants to either an experimental or control group. This allows researchers to compare the outcome (e.g., test scores) of the experimental group to that of the control group, and to assess the effect of the treatment. The strongest research design for establishing evidence of effectiveness.
research based on, tested by, or having the nature of an experiment.
In this report, experimental reading instruction research includes studies that (1) objectively compare groups of learners receiving different forms of reading instruction and (2) use statistical procedures to help determine how likely it is that one approach is significantly different from another. These studies are designed to increase our confidence in drawing conclusions about the effectiveness of a particular approach to instruction.
A type of study design involving comparison of a group that receives an intervention (experimental or treatment group) and a group that receives standard care or no intervention (control group) in which participants are randomly assigned to one of these groups. This study design permits researchers to assess cause-and-effect relationships and can be used to determine intervention effectiveness.
A research technique in which variables of interest (such as drug treatment or diet) are deliberately manipulated by the researcher.
Scientific investigation in which an investigator manipulates and controls one or more independent variables to determine their effects on the outcome (dependent) variable.
Research that generates data by investigating biochemical substances or biological processes. Experimental research is often conducted in vitro, such as in test tubes. It is also conducted in vivo in both animals and humans.
A form of research (sometimes used in marketing research) where matched sets of people are controlled for certain variables (such as income, age, and so on) while other variables (such as products offered) are varied to test research questions. See: marketing research.