What have I learnt from this video

I learnt that pigeons learns to pick a reward which best fit its actions. If the bird only have to peck once, the bird, in my opinion, thus think it doesn't have to work hard for a quick reward. As a result, the bird learns that pecking red is more rewarding than pecking green and wait 5 seconds for twice the reward. However, forcing the bird to peck 15 times, the bird has worked harder and might have learnt that green with its 5 second delay but giving twice the food is more promising than red. Thus proves the ablilty that animals can think. Humans, being an animal too, must be able to think too.

I also learnt that one stimuli can have multiple UCSs. These UCSs can even be the shut down of the immune system. This proves that psychological attributes like fear can kill you.

I also learnt that experimenting like the case of Little Albert is now ban. This is because it is every unethical to hurt animals or put fear in little children.