I recently submitted Why do Children abuse robots? (<a href="https://news.ycombinator.com/item?id=20195120" rel="nofollow">https://news.ycombinator.com/item?id=20195120</a>) which links this research <a href="https://rins.st.ryukoku.ac.jp/~nomura/docs/CRB_HRI2015LBR2.pdf" rel="nofollow">https://rins.st.ryukoku.ac.jp/~nomura/docs/CRB_HRI2015LBR2.p...</a> which has some relevance to this.