This is the report of a tentative empirical research in Chinese ESL learners productive vocabulary.

Researches into L2 learners productive vocabulary are scarce.

Fossilization in second language productive vocabulary acquisition is caused by various factors: lack of motives in learning,poor quality of language input,lack of positive feedback and improper use of learning strategies.

The productive vocabulary ability of L2 learners stops developing after reaching a certain stage.

Based on the theoretical foundations of propositional analysis of semantic content and Gravitational Model of Linguistic Availability, the present study intended to investigate the effect of productive vocabulary ability on word-accuracy in C-E CI, and the possible explanations.

Both receptive and productive vocabulary knowledge was studied.

Many problems have emerged in college non-English majors’vocabulary learning, such as small vocabulary size, the students’receptive vocabulary and productive vocabulary knowledge do not develop in a balanced way and their productive vocabulary size lags far behind the receptive vocabulary size.

By administering a battery of vocabulary tests,collecting empirical data,and making statistical analyses,the following results were attained: 1) College students\' receptive and productive vocabulary knowledge developed in their first two years of English study.

However, research on productive vocabulary development is still scanty, and many questions about productive vocabulary remain unsolved, for example, do genders affect the development of productive vocabulary? Do different majors affect the development of productive vocabulary? Little research has been done in the t.