master go’s Reviews > Stolen Focus: Why You Can't Pay Attention— and How to Think Deeply Again > Status Update

As he described what happened to these horses, he used a phrase that struck me. He said these horses are suffering from ‘frustrated biological objectives’. Horses want to roam and run and graze. When they can’t express their innate nature, their behaviour and focus go awry, and they start to act out.

It is a good book about focus