Figure 6. Thorndike's normalized results seem to be closely similar to exponential time decay

From

On Comparative Analogy between Ant Colony Systems and Neural Networks Considering Behavioral Learning Performance

Hassan M. H. Mustafa, Ayoub Al-Hamadi, Mohamed Abdulrahman, Shahinaz Mahmoud, Mohammed O Sarhan

Journal of Computer Sciences and Applications. 2015, 3(3), 79-89 doi:10.12691/jcsa-3-3-4