Which of the following is not considered a type of experimental design?

Partial factorial design is often associated with experimental designs, as it involves a subset of the factorial combinations of factors, but does not encompass the full range of experimental designs typically categorized in formal studies. In contrast, one-factor experimental design focuses on the effect of a single independent variable on a dependent variable and is straightforward in its approach. Full factorial design examines all possible combinations of factors and levels, allowing in-depth analysis of interactions between variables. Block design organizes experimental units into blocks that are similar to control for variability, which is also a recognized experimental design methodology.

Since partial factorial design is a specific technique within the broader category of factorial designs rather than a distinct experimental design on its own, it does not fit the criteria as a standalone experimental design type compared to the others listed, which represent established methodologies in experimental research.