Final answer:
Researchers have found support for the existence of both human and animal insight learning, especially in primates like chimpanzees, who demonstrate problem-solving abilities indicative of insight learning.
Step-by-step explanation:
In exploring the content loaded question of which of the following is true of research on insight?, we can confirm that researchers have found support for the existence of both human and animal insight learning. Although it was once believed that humans were unique in their ability to use insight learning for complex tasks such as tool-making, scientific research, including the work of Wolfgang Köhler with chimpanzees, has demonstrated that other animals, particularly highly intelligent primates, are also capable of such sophisticated behaviors. These studies reveal that insight learning is not limited to humans but is evident in animals with relatively great intelligence, like apes, who have been shown to use reasoning and past experience to solve problems.
Research on insight learning has shown that option b is true - researchers have found support for the existence of both human and animal insight learning.
Insight learning is a type of learning that involves coming up with new ways to solve problems based on past experiences and reasoning. It is not exclusive to humans, as some animals, like chimpanzees and gorillas, have demonstrated the ability to use insight learning to solve problems.
For example, chimpanzees have been shown to use insight learning to solve puzzles or learn behaviors from observing others.