How smart were they? The general answer is that every successful animal is just as smart as it needs to be. While that isn't very helpful if you're looking for an IQ score, it's significant for understanding. Big herbivores don't need particularly big brains because their need for intelligence is low: the eat, they mate, they flee from danger. The brain of a predator does need to be good and the brain of a small animal with many different predators trying to eat it hardly less good.
Tyrannosaurs had bigger brains than humans, but of course they were bigger creatures. Also, much of their brains were probably (we're guessing based on shape) devoted to sense of smell. Some man-sized dinosaurs like saurorthoides had brains as big as ostriches'.
Having a dinosaur mentality means someone who does not move with the times, who will not accept and use new or changing values or systems.
The plural form for the noun mentality is mentalities.
Thug Mentality was created in 1999.
Carry On Mentality was created in 1997.
Heaven's Mentality was created in 1997.
Rockstar Mentality was created on 2007-06-19.
Poisonous Mentality was created on 1992-04-07.
The Anti-Capitalistic Mentality was created in 1956.
I don't understand the mentality of the parents who do homework for their children.
Bunker Mentality is a golf clothing brand, they make 'fashionable' clothes.
The Anti-Capitalistic Mentality has 114 pages.
What Is Helping Mentality?I Think It Is Helping Others By Money Or Some Other Ways.