Research Design: Experimental Research (Components of experimental…
Research Design: Experimental Research
Components of experimental research
This refers to anything done to groups in ordert to measure its effect.
Type and number of groups
Groups can be formed especially for the purposes of the experiment or they can be natural in the sense that they already exist prior to research.
Measurement or observation
It refers to how the effects of the treatment will be avaluated
Single groups designs
One shot design
In this desing a single treatment is given to a single group or individual.I t is aldo apilot study.
One group pre-test + post test
This design attepmts to use the subjects as their own controlls and to eliminate the need for a control group design.
Time- sampling design
These are also reffered to as time-series designs beacuse a number of samples or observations are taken over a period.
Desings using control groups
Static group or pre-experimental desingn
It allows us to utilize groups which already exist, such as classes found in school.
Pre-test/post-test with randomization of groups
It is a precedure with which to reduce the amount of systematic error that might result from biasis in the assignment of subjects to groups.
This are similar to the true experimental designs discussed above and include all of the element foun in those designs such as grouping by randomization, pre and post- testing, and treatment.
It is often used in second language research with a minor variation on the classical factorial design described above.
Quasi -experimental design
These are constructed from situations which already exist in the real world, and are probably more representative of the conditions found in educational contexts.
eparate sample design
This design is useful for those situations in which the researcher has acces to only one group os subjects at a time.
It allows for a larger population to be treated
It overcones the problem of lack of acces to large enough groups of subjects at any one time.
It allows us to control for changes due to history and in that sense, becomes like a time-series study with one group.
Rosibel Sánchez 4-750-1962