Experimental Design Diagram (EDD) is a diagram

Diagram

A diagram is a two-dimensional geometric symbolic representation of information according to some visualization technique. Sometimes, the technique uses a three-dimensional visualization which is then projected onto the two-dimensional surface...

 used by scientists, to design

Design of experiments

In general usage, design of experiments or experimental design is the design of any information-gathering exercises where variation is present, whether under the full control of the experimenter or not. However, in statistics, these terms are usually used for controlled experiments...

 an experiment

Experiment

An experiment is a methodical procedure carried out with the goal of verifying, falsifying, or establishing the validity of a hypothesis. Experiments vary greatly in their goal and scale, but always rely on repeatable procedure and logical analysis of the results...

. This diagram helps to identify the essential components of an experiment. It includes a title, the research hypothesis

Hypothesis

A hypothesis is a proposed explanation for a phenomenon. The term derives from the Greek, ὑποτιθέναι – hypotithenai meaning "to put under" or "to suppose". For a hypothesis to be put forward as a scientific hypothesis, the scientific method requires that one can test it...

 and null hypothesis, the independent variable

Independent variable

The terms "dependent variable" and "independent variable" are used in similar but subtly different ways in mathematics and statistics as part of the standard terminology in those subjects...

, the levels of the independent variable, the number of trials, the dependent variable, the operational definition of the dependent variable and the constants.
The EDD stands for experimental design diagram.

External links

• http://www.fcps.edu/MTS/TMPC/Aids/elementary/science/pdf/Expermential%20Design%20Vocab.pdf
• http://www.fcps.edu/PoplarTreeES/images08/Blank_EDD.pdf
• http://www.pwcs.edu/science/science_fair/blank_experDesignDiagram.pdf
• http://www.pwcs.edu/science/science_fair/experDes.htm