The term âcarrier oilâ encompasses hundreds of different oils and butters. In the most basic sense, the word âcarrierâ serves to distinguish oils that are not âessentialâ oils. Common carrier oils include olive oil, coconut oil, shea butter, cocoa butter, grapeseed oil, canola oil, sweet almond oil, walnut oil, and more. The oils in this category vary wildly in terms of texture, colour, thickness, nutritional composition, and scent, but generally they are our base oils/butters.
In order to proceed with his research, Ebbinghaus had first to invent stimulus materials. These needed to be relatively simple, neutral as to meaning, and homogeneous. They needed to be available in large numbers and to allow quantitative manipulation of the amount of material to be retained.
The aufbau method was originally proposed by the great Danish physicist Niels Bohr who was the first to bring quantum mechanics to the study of atomic structure and one of the first to give a fundamental explanation of the periodic table in terms of arrangements of electrons (electronic configurations).