- The IKEA effect is a cognitive bias in which consumers place a disproportionately high value on products they partially created. [Wikipedia](https://en.wikipedia.org/wiki/IKEA_effect) - From [Phauer Code Review Guidelines](https://phauer.com/2018/code-review-guidelines/) - The effect was demonstrated by the following experiment: Two groups should price the value of IKEA furniture. One group got already assembled furniture, the other group had to assemble them first. The results showed that the second group was willing to pay 63 % more than the first group. - The IKEA effect let us place more value on things (furniture, code) we have created by ourself. - Applied to software development this means: We place more value into code that we have written. It might be harder for us to accept changes or removal of code that we have created. It’s important to be aware of this bias when we receive feedback because we might be influenced by the IKEA effect.