Final answer:
Boehm shifted from a lifestyle of hedonism and apathy to one exemplified by diligence, leading to academic success in his doctoral program.
Step-by-step explanation:
As opposed to the hedonism and apathy of his undergraduate years, during his doctoral program, Boehm became a model of diligence and his earnest devotion led to academic laurels. Hedonism refers to the pursuit of pleasure as the highest good and primary motivation for living, while apathy is a lack of interest, enthusiasm, or concern. Diligence, in contrast, is careful and persistent work or effort. Boehm's transformation from a state of seeking pleasure and showing indifference to his studies to one of earnest and persistent effort exemplifies a significant change in personal values and work ethic.