Schachter (1959) defined the high-anxiety condition in terms of the presence of electrical equipment in the room, dr. zilstein’s ominous behavior, and the explicit statement that subjects should expect painful shocks. these were all elements of the

1. experimental operational definition.
2. hypothetical operational definition.
3. independent operational definition.
4. measured operational definition.

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.