Lihua Jin

Kahveci M, Jin L (2018)

This study presents the development stages and validity evidence of a new **two-tier diagnostic test** designed to conceptually assess **oxygen binding to hemoglobin and its delivery** from the lung to the tissues in a biochemistry course. The validity of the instrument relies on the input of **seven expert opinions** from biochemistry professors across the United States. The final instrument consists of **11 questions**. Analysis of preliminary data (expected to be about 30 undergraduates) will provide evidence on students’ conceptual patterns regarding this difficult-to-learn biochemistry topic. In conclusion, this study contributes a new validated instrument and preliminary results to chemistry education research.

Source: Paper presented at Biennial Conference on Chemical Education (BCCE). Notre Dame, IN, USA. July 29 – August 2, 2018.

Kahveci M, Jin L (2017)

This workshop focuses on measuring students’ **conceptual understanding** in an undergraduate biochemistry course at DePaul University, specifically targeting the complex topic of **oxygen binding to hemoglobin and its delivery** from the lung to tissues. This topic requires students to use complex **graphical representations and mathematical knowledge** to explain physiological phenomena. The proposed assessment method aims to move beyond rote learning by using a **two-tier diagnostic instrument** that assesses not only the correct answer but also the student's **reasoning** behind it. The content includes interpreting how oxygen pressure determines hemoglobin saturation, mapping saturation levels, understanding the correlation between tissue acidity/$\text{CO}_2$ level and oxygen release (the **Bohr effect**), and adapting to high altitude. The workshop introduces the development stages of this two-tier instrument and includes a group activity where attendees design their own diagnostic test.

Source: Paper presented at DePaul University Teaching and Learning Conference. Workshop. Chicago, IL, USA. May 5, 2017.