Data Description THE RESEARCH FINDING

21 As seen from the table, the noun words that appear 3 times on the test are the nouns mouse and person. The noun word mouse shows its number of errors as 11 on the first test part, 11 on the second part, and 13 on the last part of the test. In other words, it shows its quite constant level, if not the decrease one. Similarly, the noun word person has its relative stable value from the first part through the third part of the test, i.e. 10, 10, and 9.

B. Data Identification

The students‟ test result of the incorrect forms of the irregular plural nouns are identified and classified first before knowing the causes of those errors, as follow: Table 4.4 First Identification of the Students’ Error test-1 Test item Identification of Error Classification of Error’s Description Explanation Correction Causes of Error 2. Childs are Word order The word „childs‟ should be replaced by „children‟ Children are Inter- lingual transfer 6. Some mouses Word order The word „mouses‟ should be replaced by „mice‟ Some mice Inter- lingual transfer 10. Many persons Word order The word „persons‟ should be replaced by „people‟ Many people Inter- lingual transfer 11. 20 toothes Word order The word 20 teeth Inter- 22 „toothes‟ should be replaced by „teeth‟ lingual transfer 13. Womans are Word order The word „womans‟ should be replaced by „women‟ Women are Inter- lingual transfer 14. Sheeps are Add a word addition The word „sheep‟ should be replaced by „sheep‟ Sheep are Context of learning 15. Mans always think Word order The word „mans‟ should be replaced by „men‟ Men always think Inter- lingual transfer 23 Table 4.5 Second Identification of the Students’ Error test-2 Test Item Identification of Error Classification of Errors types of error Explanation Correction Causes of Error 9. Childs Word order The word „childs‟ should be replaced by „children‟ Children Inter- lingual transfer 10. Mans Word order The word „mans‟ should be replaced by „men‟ Men Inter- lingual transfer 11. Mouses Word order The word „mouses‟ should be replaced by „mice‟ Mice Inter- lingual transfer 12. Tooths Word order The word „tooths‟ should be replaced by „teeth‟ Teeth Inter- lingual transfer 13. Deers Add a word addition The word „deers‟ should be replaced by „deer‟ Deer Context of learning 14. Persons Word order The word „persons‟ People Inter- lingual 24 should be replaced by „people‟ transfer 15. Womans Word order The word „womans‟ should be replaced by „women‟ Women Inter- lingual transfer 16. Stimuluses Word order The word „stimuluses‟ should be replaced by „stimuli‟ Stimuli Inter- lingual transfer 19. Gooses Word order The word „gooses‟ should be replaced by „geese‟ Geese Inter- lingual transfer 20. Sheeps Add a word addition The word „sheeps‟ should be replaced by „sheep‟ Sheep Context of learning 23. Crisises Word order The word „crisises‟ should be replaced by „crises‟ Crises Inter- lingual transfer 24. Bacteriums Word order The word „bacteriums‟ should be replaced by „bacteria‟ Bacteria Inter- lingual transfer