子どもの頃の「読み聞かせ」が20％の子どもにとって殊更有益なワケ
Coursera 単元２
「ディスレクシアはデコーディングの問題だと概念化されますが、同時に並存して言語的な問題を伴います。発達の面から考えると時間が経つにつれてデコーディングの問題は言語的な発達そのものへの影響を持つことが考えられます。マシュー効果とも呼ばれています。」「読む量が少なくなり、新しい語彙に触れることも少なく、その語彙の獲得が徐々に遅れる。」
読み聞かせは、「新しい語彙」に触れる機会を増やし、様々な言い回しと同時に、理解の助けになる様々な概念（社会科学自然科学）を得ることができるから。日本はデコーディングの遅れがわかりにくいから、予防的にも有益だし、
もちろん、デコーディングだけでない、言語理解処理や情緒、社会性、知識に至るまで効果があるわけだが。
So this a context, so I think it's important to remember that although
dyslexia is often conceptualized as a specific problem with decoding,
that can also very much exist with accompanying language problems and
it also if we think about things developmentally, the decoding problems
can over time actually have an impact on language development itself.
This is sometimes called the 'Matthew effect' which you may have heard of.
This refers to a biblical reference actually, but
the concept is common across reading.
And the story here is that if a child has struggles to decode, they're going to
perhaps read less text over time, be exposed to less new vocabulary
and that gradual reduction of their vocabulary learning
can actually result in a lower ultimate vocabulary level compared to their peers.
So while their language might have started off at the level of their peers,
if they're not being exposed to enough print content, that can be an issue.
