When the dog is repeatedly teased with the sight of objects inducing salivary secretion from a distance, the reaction of the salivary glands grows weaker and weaker and finally drops to zero.
Interpretation
This quote illustrates the concept of habituation, where repeated exposure to a stimulus reduces the response over time.
Ivan Pavlov's quote reflects his findings in classical conditioning and physiological responses, specifically how an organism's reaction diminishes when exposed to the same stimulus without reinforcement. In this scenario, the salivary glands of a dog eventually become less responsive to cues that previously triggered its salivation, highlighting the importance of consistency and expectation in learning and behavioral response.
In practice
In a psychology lecture about conditioning, you could use this quote to demonstrate how repeated exposures affect behavior.
If we could look through the skull into the brain of a consciously thinking person, and if the place of optimal excitability were luminous, then we should see playing over the cerebral surface, a bright spot with fantastic, waving borders constantly fluctuating in size and form, surrounded by a darkness more or less deep, covering the rest of the hemisphere.
From the described experiment it is clear that the mere act of eating, the food even not reaching the stomach, determines the stimulation of the gastric glands.
It is not accidental that all phenomena of human life are dominated by the search for daily bread - the oldest link connecting all living things, man included, with the surrounding nature.
Science demands from a man all his life. If you had two lives that would not be enough for you. Be passionate in your work and in your searching.
Learn the ABC of science before you try to ascend to its summit.
Do not become archivists of facts. Try to penetrate to the secret of their occurrence, persistently search for the laws which govern them.
I met with amnesiacs and savants, educators and scientists, to try to understand what memory is, why it works, why it sometimes doesn't, and what its potential might be.
Evolution is a process of constant branching and expansion.
As those who have seen Jurassic Park will know, this means a tiny disturbance in one place, can cause a major change in another. A butterfly flapping its wings can cause rain in Central Park, New York. The trouble is, it is not repeatable. The next time the butterfly flaps its wings, a host of other things will be different, which will also influence the weather. That is why weather forecasts are so unreliable.
Philosophy of science is about as useful to scientists as ornithology is to birds.
Science fiction [is] the kind of writing that prepares us for the necessary mutations brought about in society from an ever changing technological world and as a result. The mainstream hasn’t excluded SF; the mainstream has excluded itself. No one told Jules Verne he was a science fiction writer, but he invented the 20th century.
I tried out various experiments described in treatises on physics and chemistry, and the results were sometimes unexpected. At times, I would be encouraged by a little unhoped-for success; at others, I would be in the deepest despair because of accidents and failures resulting from my inexperience.
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