There is only one emotion that is good for learning: happiness and all its derivations.  Joy is a derivation of happiness.  Joy is pleasurable.  Humans are rewarded by their emotions for doing things that bring them joy.  They tend to repeat these behaviors.  Fear keeps us from doing certain things.  Fear of failure.  Fear of humiliation.  Also, things that make us sad or unhappy keep us from doing certain things.  Being forced to sit in a chair and perform like a trained seal creates sadness, boredom, and frustration. The SoR zealots fail to realize that we’re teaching children who just happen to be developing human beings, who happen also to be emotional and social beings existing in a sociocultural context.  We read and emote with the same brain.  It’s silly to think that one would not impact the other.  Positive emotions enhance learning, and negative emotions impede learning.  Take that to the bank, baby.  We’ve got plenty of research to support this.  So, we can say with some confidence that creating a positive emotional environment in which there is social interaction, safety, and joy is a research-based strategy.