i was smacked as a child and was very scared of my dad as a result, once he left(when parents split up whne i was 10) i think i got a more acurate version of a good clip round the ear from my mum, there fore i do believe that smacking(in the right circumstances) cant be harmful.
but saying that when i was going through very bad depression a couple of yrs ago i seemed to recall smacking my poor dds night and day almost, after a short while i realised what i was doing (thank god) and also relised by this point smacking was becoming pointless ie, my children became immune to it in a way (the same way as they had to my shouting) it had no effect it just went over their head IYSWIM.
thank goodness i got help and changed my behaviour(the childrens behaviour also changed as a result) and hopefully the effects wont be too much as they were quite young at the time 18mths and 4 yrs
im not saying i never smack them now that would be a lie, but they have to have done something truly bad to result in smacking (which means it has an effect of shock now becuse its few and far between) as well as the fact i have found more effective ways of punishment ie no puddings/or no tv
but things have also changed with age they are 7 and almost 5 now and i feel much more in control now dd2 has a rigid routine of school, and find im much better able to cope with her difficult behaviour ,now im not with her 24 hrs a day as well, and i can now talk to dd2 and get her to undrstand such and such is wrong, and theres compromise on both sides where there wasnt before.
i truly believe you get stuck in a vicous circle, which is very hard to get out of im still not sure how i changed my behaviour, other than being around much more positive ppl, and consulting my health visitor who became good friend through, her regular visits helped me to feel empowered and in control enough to feel i could change if iwanted to and that by me changing the children would follow, which they did
i sound a bit richeous and up my own arse now i know but beleive me my house wasnt a nice place to be some time ago and i now beleive my home is an enjoyable place to be, and most of all me and the kids have crossed words like evryone else but we all smile and laugh alot more now
i do really hope this helps and you have some good support you can lean on even if only for a short while
sorry for whitttling on