You may find these interesting,
although not related to your actual question but more like a qualification of your initial statement, and because you seem interested in these things.
In particular this one:
Reading vs. listening for vocab acquisition
Interesting excerpt
It therefore appears that,
not surprisingly, the written form is significantly easier to acquire from written input than spoken
input while, interestingly, the spoken form is acquired with similar ease from written and spoken
input.
But also this:
Reading and vocab acquisition
Theres hardly anything surprising about the findings, but theyre worth a read regardless.
In particular i find this very relevant for us wanikaniers (also from the reading vs. listening study)
Interesting excerpt:
beyond the first few thousand most common words in an L2, most vocabulary is acquired incidentally from context (Ellis, 1994; Huckin & Coady, 1999). Exposure to large amounts of written and spoken input enriches and consolidates knowledge of partially-known words and can also develop knowledge of new words (Brown, Waring, & Donkaewbua, 2008). Researchers therefore emphasize that incidental vocabulary acquisition is necessary for any well-balanced L2 vocabulary learning program (Nation, 2001; Schmitt, 2008).
But also this is not particularly surprising
For further reading theres also
A comparison of reading, listening and reading while listening.
It shows a slight increase of vocab acquisition when comparing reading while listening to reading-only,
meanwhile listening-only lacks significantly behind in most respects.
(This seems to indicate that watching shows/movies with subs in the target language or audiobooks with a written copy to be the best vocab method, altough it only appears marginally better than simply reading, at least for the tested results)
Disclaimer:
As with all studies, there are limitations to consider and some caveats to the results that must be taken into account, thankfully the researchers of these papers have done a good job at dealing with those considerations.
Also might i suggest renaming the title to
āwhat are the effects of listening/reading on language learning appart from vocabulary acquisition?ā