OPINION:
The other day I was chatting to a parent about the strife she was having with her 7-year-old son. I had asked her what she had already tried to manage his big anger outbursts, his hitting and his screaming. She told me that she had tried "everything".
Herein lies the problem. I suspect her son was experiencing a sense of bewilderment as he found himself in the midst of different rules and systems each day. Some days a threat, some days a sanction. Sometimes a growl, other times a reward chart, and some days nothing at all in his mum's efforts to ignore his behaviour.
This scenario is common today as parents have access to an endless catalogue of parenting advice. The challenge is that a lot of advice is contradictory, which means that parents can still feel uncertain about what they are doing in case they've picked the "wrong" strategy. Parenting is hard enough at the best of times, but when you are worried that there could be a "better" way, you often don't see something through.
The other common dynamic that takes place is that our robust and resilient children are looking to see if a parent really means what they are saying. They do their research and find out that Mum or Dad may mean it, but experience has told them that the rules are flexible and it might depend on how busy, tired or stressed their parent is as to whether today is the day the rule sticks.