Merve Sarac

College Board · Psychometrics

In October 2021, the Graduate Student Issues Committee at NCME called their graduate students to create a study group about the current edition of The Standards for Educational and Psychological Testing (Standards). During this study group, we studied eachchapter of the Standards and consulted with different Experts about its content and potential...

In this study, we investigated prospective secondary mathematics teachers’ development of a meaning for the Cartesian form of complex numbers by examining the roots of quadratic equations through quantitative reasoning. Data included transcripts of the two sessions of classroom teaching experiments prospective teachers participated in, written arti...

Functional distractors (the incorrect options in a multiple-choice question) should draw attention from those test-takers who lack sufficient ability or knowledge to respond correctly. Unfortunately, previous research on distractors has demonstrated the unsettling reality that this rarely occurs in practice leading to recommendations for creating i...

This study is an exploratory analysis of examinee behavior in a large-scale language proficiency test. Despite a number-right scoring system with no penalty for guessing, we found that 16% of examinees omitted at least one answer and that women were more likely than men to omit answers. Item-response theory analyses treating the omitted responses a...

This study investigated a prospective secondary mathematics teacher's development of the meaning of the Cartesian form of complex numbers during a teaching experiment. We illustrate that through shrinking/stretching of the distance(s) between the roots and the x-coordinate of the vertex of any quadratic function one might conceptualize complex numb...