The cognitive approach began to revolutionize psychology in the late 1950âs and early 1960âs, to become the dominant approach (i.e. perspective) in psychology by the late 1970s. Interest in mental processes had been gradually restored through the work of Piaget and Tolman.
poâ¢rosâ¢iâ¢ty. 1. the state or quality of being porous. 2. (in rock or other natural material) the ratio of aggregated pore space to the volume of the entire mass: used as a measure of the amount of fluid, as oil, that a geologic stratum might hold. [1350â1400; Middle English porosytee porÅsitÄs. See porous, -ity ].
Porosity and Permeability Lab. The terms porosity and permeability are related. ï· porosity â the amount of empty space in a rock or other earth substance; this empty. space is known as pore space. Porosity is how much water a substance can hold. Porosity is usually stated as a percentage of the materialâs total volume. ï· permeability â is how well water flows through rock or other earth substance.