Student Question: Learned helplessness

[pamela]

Hello,

  This student question came up during the chapter on learning.
I don't have the original article and can't find further discussion of
LH in any of my texts.  

 Following Seligman's original experiments, were there conditions
under which the learned helplessness behavior was extinguished?
If so, how many unpaired trials before the dogs regained escape
behavior?  Were there attempts to carry the dogs over the divider
to "teach" the benefits of escape? 

Thanks,

Pam