This article examines the behavioral differences of essay scorers who
demonstrate different levels of proficiency for a psychometric scoring
task. The authors compare three proficiency groups to identify differ
ences in (a) essay features they consider, (b) their understandings of
the scoring rubric, and (c) their decision-making procedures. Results
indicate scorers with different levels of proficiency do not focus on
different essay features when making evaluative decisions but their u
nderstandings of the scoring criteria may vary Proficient scorers are
more likely to focus on general features of an essay when making evalu
ative decisions and to adopt values espoused by the scoring rubric tha
n are less proficient scorers. Also, proficient scorers make evaluatio
ns by reading the entire essay and then reviewing its content, whereas
less proficient scorers may interrupt the reading process to monitor
how well the essay satisfies the scoring criteria. Finally, the author
s discuss implications for scorer selection and training.