After explaining how the errors can influence performance reviews please answer the below question:

Q : identify how below errors can be corrected/prevented?

Similar to me error. Similarity leads to attraction, so we tend to favor those who are similar to us. Consequently, in some cases, raters are more likely to give higher performance ratings to those employees who are perceived to be more similar to them in terms of attitudes, preferences, personality, and demographic variables, including race and gender.

Contrast error. Contrast error occurs when, even if an absolute measurement system is in place, raters compare individuals with one another, instead of against predetermined standards. For example, when a rater rates an individual of only average performance, the rating may actually be higher than deserved if the other individuals rated by the same rater display substandard performance levels: the average performer may seem to be much better in comparison to the others. This error is most likely to occur when raters complete multiple appraisal forms at the same time because, in such situations, it is difficult to ignore the ratings given to other employees.

Kindly, I would like a written answer, not a picture.

Thank you in advance for not copying other's answers. << important