The anchoring effect results from a judgment heuristic , an orientation mechanism that our brain uses to make decisions.
At an evolutionary level , the use of heuristics is advantageous . In many situations, there is no time to gather all the information or record it and weigh it to make the best possible decision. In prehistoric times, if a wild animal approached, there was no time to wonder if it is dangerous or not, because there was an imminent danger of death. To this day, thinking approaches and shortcuts have proven their worth in countless situations in our everyday lives.
These judgment heuristics allow us to save energy and willpower, since they take place as unconscious and effortless cognitive processes . Our brain only activates conscious and controlled thinking when something unexpected happens that attracts our attention. An experienced driver can walk the drive to work almost with his eyes closed. However, if a construction site blocks the usual route, it will keep your eyes peeled. Our brain also uses judgment heuristics when we are tired, distracted, or overloaded.
The anchoring effect is a cognitive bias resulting from this heuristic . Kahneman and Tversky theorized that this occurs because people are unable to correct a judgment made from an anchor. Later research contradicted the theory, so that today there are several explanations, but ultimately it is not clear why our brain is vulnerable to the anchoring heuristic.
One thing is certain: this is not the only cognitive distortion that influences our thinking. Other known distortions are the IKEA effect, the halo effect, the lure effect, the endowment effect, and the drag effect. Like the anchor effect, all of these phenomena can be used in marketing and sales.