It can be seen from Bar Graph 1 that the higher the grade level of
participants, the higher the vocabulary test scores. The graph reveals that the Thai-
English vocabulary translation scores of Matayom 4 participants were the lowest
(50%), those of Matayom 5 participants higher (59%), while those of Matayom 6
participants the highest (69%). The graph also indicates that the English-Thai
vocabulary translation scores of Matayom 4 participants were the lowest (44.33%),
those of Matayom 5 participants higher (63%), while those of Matayom 6 participants
the highest (74.33%). However, it can be noticed that Matayom 4 participants did
less well on English-Thai vocabulary translation than Thai-English vocabulary
translation, while Matayom 5 and Matayom 6 participants did slightly better on
English-Thai vocabulary translation than Thai-English vocabulary translation