There are several key cognitive shifts that every poker player should be alert to. The first is the fixation shift. This shift is manifested by the fact that if the mind is presented with a stimulus, even in an irrelevant context, subsequent cognition will be "pinned" to that stimulus. The statement is very abstract and therefore requires an example.
Let's say we are testing two groups and we ask each group to write down a number. Let's say it's the ID number of the experiment, which each person had to fill in on their sheet. The first group wrote 1000, the second 10. Then, we asked them to guess the average cost of a guided tour in London. The first group, which wrote a larger ID number, consistently guessed a larger number than the second, even though the original larger number was written in a completely irrelevant context. In other words, cognition was anchored closer to the numbers the subjects had encountered earlier. Remembering the structure of neuronal networks in the brain, this behaviour is logical - when certain neurons are activated, the neurons closest to them also tend to be more activated, and neurons that correlate with larger numbers are more closely connected to each other than those that correlate with small numbers. This shift shows that the order and manner in which neurons are activated has a very strong influence on your thinking.
One might ask, what does this have to do with poker? A lot, in fact - the entrenchment effect is very common in the language of poker, in the game and in the review. For example, imagine you are playing with a tilt player who is suicidal bluffing, wasting his stack in the most unorthodox places, and you easily call him down. You stack him, he exits and an aggressive reg joins in, and let's say the same situation happens again on the river, where the tilt player has made an absurd bluff. Guess what the positional shift of the setup has foreseen for your mind?
Of course, you can use your intuition. But you are more likely to call, even though what happened with the previous opponent is completely irrelevant to how the current opponent is playing. It's just that, for whatever reason, it's easier for you to imagine that he is bluffing. So it is easier to call. This is the cognitive shift in reinforcement.
Another, very common example of a shift in entrenchment is the review of the latest poker session. When you review the session's losses as soon as you have played them, you feel that you have played the best you can in that situation and that all your assumptions were correct. Even though you lost, your choice looks like the best possible decision. But if you go back and look at the same hands the next day, you realise how wrong your assumptions were and how unbalanced you were during the game. So your perception was "stuck" to the previous one, making it harder to be objective.
There are many ways to influence yourself in this way, such as analysing hands, talking about poker, imagining hands, reviewing an old session, watching a video, or even engaging in some other activity that prompts you to think about being aggressive or passive, all of which have the potential to influence your next decisions.
Of course, we can clear our minds of everything. But to do that, we first have to learn to live with those shifts. They are natural creations of our brain. If we are aware of them, we will be able to counteract them more consciously.
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