1. The study examined the effects of different types of listening support (topic preparation, vocabulary instruction, repetition of input, and preview of questions) on the listening comprehension of English language learners at two proficiency levels.
2. Results showed that repetition of input benefited higher proficiency learners more by allowing them multiple exposures to the material. For lower proficiency learners, topic preparation was most effective as it activated background knowledge.
3. The researchers concluded that topic preparation and repetition of input can help both higher and lower proficiency learners, but repetition works best for higher levels when combined with vocabulary support or topic knowledge for lower levels. Using topics already covered in class also facilitates listening comprehension.