def __init__(self, parent, session, responseCallback, **kwds):
wx.Panel.__init__(self, parent, -1, **kwds)
self.sizer = wx.BoxSizer(orient=wx.VERTICAL)
self.SetSizer(self.sizer)
self.stimulus = StimulusPanel(self, session, self._onTrialEnd)
self.sizer.Add(self.stimulus, 0, wx.EXPAND)
self.response = ResponsePanel(self, session, responseCallback)
self.sizer.Add(self.response, 0, wx.EXPAND)
