DETERMINATION OF THE UNIVERSITY STUDENTS’ MISCONCEPTIONS ABOUT THE TOPIC “PASSAGE OF SUBSTANCES THROUGH CELL MEMBRANE” BY TWO-TIER TEST

Year 2019, Volume: 6 Issue: 2, 275 - 286, 28.02.2019

Sevil Özcan

Abstract

Information that is contrary to the scientific reality is called
misconceptions, and students gain them as a result of their past experiences. Learning
new and correct information becomes more difficult or even hamper due to
misconceptions. This study was conducted to determine the misconceptions of the
health-care technician students related with the passage of substance through
cell membrane. It was performed with 335 students. The research subject was explained
to the students in a two-hour course by a researcher in the human physiology
course. One week later, a two-tier diagnostic test consisting of seven
questions was applied.

It was seen that diffusion was the most known subject by the students and
the correct answer rate was 77.9% (n:261). On the other hand, the least known
subject was the calculation amount and the direction of the passage matter's
(plasmolysis and deplasmolysis events) depending on ambient density (number of
correct answer: 9.3%, n:31). Some misconceptions that were identified are the
following: 1- 33.7% of students thought that the active substance transport occurred
only from low density medium towards high density medium. 2-36.1%of students
thought that pure water was isotonic. 3-53.7% of the students thought that the
large molecules such as starch could pass through the membrane until the
density to equal in both side.

The data were compared in SPSS 15.0 program depending on whether students participated
in the training programs that was given as a research subject or not.  The correct response rate for questions was
significantly different between participating and nonparticipating groups (p =
.01 for multiple choice questions and p = .003 for open ended questions), and
most successful training program was physiotherapy.

Keywords

health technician, misconceptions, passage of substances through cell membrane

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