Gwybodaeth ychwanegol a anfonwyd wedi’r sesiwn dystiolaeth ar 2 Mai 2019	Additional information sent following evidence session on 2 May 2019
Oddi wrth: Byddwch yn Rhesymol Cymru	From: Be Reasonable Wales

Does rejection hurt? An FMRI study of social exclusion (Eisenberger NI1, Lieberman MD, Williams KD): https://www.ncbi.nlm.nih.gov/pubmed/14551436

"That's not just beautiful--that's incredibly beautiful!": the adverse impact of inflated praise on children with low self-esteem: (Brummelman E1, Thomaes S, Orobio de Castro B, Overbeek G, Bushman BJ.): https://www.ncbi.nlm.nih.gov/pubmed/24434235

A meta-analytic review of experiments examining the effects of extrinsic rewards on intrinsic motivation (Deci EL1, Koestner R, Ryan RM): https://www.ncbi.nlm.nih.gov/pubmed/10589297

Comparing child outcomes of physical punishment and alternative disciplinary tactics: a meta-analysis (Larzelere RE1, Kuhn BR): https://www.ncbi.nlm.nih.gov/pubmed/15898303