Learn how to identify and control extraneous variables and confounding factors in your usability testing research design, and how to evaluate and improve your design quality.

Learn about planning experiments and variables when working scientifically with these interactive learning resources for KS2 Science students aged 7-11 from BBC Bitesize.

axes variables. For a scatter plot, at least two axes variables are required : one independent (x) and one dependent (y). For a surface plot, all three axes variables (x, y, and z) are required, and ...

'Votes' of sub-cellular variables control cell fate Date: May 16, 2010 Source: Baylor College of Medicine Summary: Members of a population of identical cells often "choose" different fates, even ...

where H ’ is the linearization of non-linear observation operator H in Eq. 1, and d = y o − H x b is the innovation vector. The transformed B matrix is given implicitly in the control variable ...

The variables of temperature, water chemistry, particle size distribution, ratio of water to coffee, time and, perhaps most importantly, the quality of the green coffee all play crucial roles in ...