Final answer:
The technique used by Jamaican DJs that involved talking over records is called toasting, which affected the development of hip hop. 'Rapper's Delight' by the Sugarhill Gang exemplifies stimulus diffusion in hip hop's evolution. Hip hop's spread and adaptation to local cultures underscore the principle of stimulus diffusion.
Step-by-step explanation:
Jamaican DJs used to entertain crowds by maintaining a steady stream of patter while changing records, and speaking over the records as they played. This technique is referred to as toasting. Toasting is a practice that influenced the development of rap music and hip hop culture. Hip hop music originally did not feature musicians playing traditional instruments, instead relying on a DJ to manipulate vinyl records on a turntable. The background music and beats in early hip hop tracks were often provided by these DJs rather than by trained musicians.
The song "Rapper's Delight" by the Sugarhill Gang is an example of how hip hop evolved through stimulus diffusion. The group from New Jersey adopted the style they had encountered in the Bronx, but made significant modifications, such as using trained musicians for background music. As hip hop has spread to various regions, including Los Angeles with the rise of "gansta rap," the genre has undergone numerous changes, reflecting local conditions and preferences. This evolution of hip hop illustrates the concept of stimulus diffusion, where the core idea spreads, but adapts uniquely in different contexts.