1. Understanding of non-technical words in science;Cassels,1980
2. Training teachers to be aware of the student learning difficulties;Johnstone,1983
3. Some issues related to the use of justifications to multiple choice items;Tamir;Journal of Biological Education,1989
4. Planning the objective test;Tinkelman,1971
5. The processing of positive and negative information;Wason;Quarterly Journal of Experimental Psychology,1959