I find it interesting to see the parents side of this. A few years ago I did a survey asking young adults whether they felt the discipline they got growing up was abuse.
Some of the respondants who experienced the harshest "discipline" didn't realize that what had been done was abusive.
According to our definition, 15 (24.59%) respondents have been abused. Seven (6.66%) stated that they had been abused at the time of the punishment.
Of the 15 (24.59%) respondents who were abused, 7 (46.66%) or 11.47% of the total respondents said that they had NOT been abused; 8 of the fifteen (53.33%) or 13.11% of the total said that they had been abused.
Five respondents (8.20%) of the total (61) said that they had been abused but were not abused according to our definition.
Of the 11 respondents that stated that their punishment was "too much," 8 (13.11% of the total) had been abused. They all had been bruised as a result of their "punishments." The other three respondents (4.91% of the total) said that their punishments were "too much," but according to our definition they had not been abused.
http://members.shaw.ca/leemarsh/psa-abuse.html
Over the years I have heard many people say that the punishments the got were normal. But then they say they would not to the same to their child.
In some cases people have had their child removed from their homes because of repeating what they thought was "normal" discipline.
What I found most interesting was the one person who said she had been abused but recieved the one slap in the face. I suspect that since physical punishment was so rarely used that the one time slap was such a shock that she felt the slap crossed the line.
Too often people say that they deserved the discipline they got even when they later realize it crossed the line. I think we need a lot more research into both the short term and the long term effects of corporal punishment on children