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　　3.4 Design of the Study

　　This pilot study was both a correlational and an experimental one.

　　The Correlational study

　　The study investigated the relationship between the learners' metacognitive listening awareness and their listening comprehension, and the study also investigated the relationship between the learners' metacognitive listening awareness and their incidental vocabulary acquisition. The measures of the learners' reported use of metacognitive listening awareness were correlated with the scores of listening comprehension and incidental vocabulary acquisition. The measures of the learners' reported use of metacognitive listening awareness were obtained by using a Likert scale questionnaire. The measures of the learners' listening comprehension were obtained from two listening tasks, and the measures of the learners' incidental vocabulary acquisition were obtained from vocabulary posttests.

　　The Experimental study

　　In the experimental study, the effects of the three conditions for performing the listening tasks on the participants' metacognitive listening awareness, listening comprehension and incidental vocabulary acquisition were investigated. The three listening conditions were:

　　1. listening texts presented once (Group A) ;

　　2. listening texts presented three times at different speeds (Group B) ; and

　　3. pre-listening activity involving topic-familiarization plus listening texts presented three times at different speeds (Group C).

　　In other words, this design of the experimental study investigated the effect of the number of times the texts were presented and the effect of the pre-listening activity on the participants' metacognitive listening awareness, listening comprehension and incidental vocabulary acquisition. 元认知策略研究：二语听力理解与附带词汇习得（英文版）