2. (General Physics) of or concerned with a lens or lenses. 3. (Botany) shaped like a lentil seed. 4. (Celestial Objects) of or relating to a galaxy with a large central bulge, small disc, but no spiral arms, intermediate in shape between spiral and elliptical galaxies.
Beck collaborated with Maria Kovacs, PhD, in the development of the Children's Depression Inventory, which used the BDI as a model. Beck's work at the University of Pennsylvania inspired Martin Seligman to refine his own cognitive techniques and exercises, and later work on learned helplessness.
He encounteredââin a pretty cursory way,â as he explains itâwork on human motivation by Rochester experimental psychologists Edward Deci and Richard Ryan. Two years later, Pink began researching how people might be motivated to do creative work. He returned to the work of Deci and Ryan.