Diakmo stated that technological advancements have given scientists more resources to understand the lives and habits of dinosaurs. "Not all dinosaurs were very intelligent, nor were all dinosaurs stupid." "Their intelligence was sufficient to adapt to the environments they lived in."
Barrett stated that some dinosaurs were "actually quite intelligent," especially some smaller carnivorous dinosaurs. "Some smaller dinosaurs may have known to be nocturnal to avoid competing with larger dinosaurs. If that's the case, you need a smarter brain to handle more information, as well as better hearing, vision, and smell."

Small carnivorous dinosaurs like Troodon are believed to be quite intelligent.