Final answer:
The error of being influenced mainly by information gathered during the last portion of the review period is true.
Step-by-step explanation:
The statement given is true. This error is known as the recency effect. It refers to the tendency of raters to rely heavily on the most recent information they have been exposed to when making judgments or evaluations.
For example, if a teacher is evaluating a student's performance over a semester and only focuses on the last few assignments, ignoring the earlier ones, this bias can occur. The recency effect can influence the rating or evaluation process and may lead to inaccurate assessments if the entire review period is not considered.