<span>This is continuous reinforcement, as opposed to intermittent reinforcement. The reinforcers can be apportioned based upon a fixed ratio (after every "x" responses, for example) or a fixed interval (every "x" seconds, minutes, days, or other time frame). As with any type of reinforcement, this can be either positive (in which something is given to the learner) or negative (in which something is removed from the learner).</span>
A simple majority of the U.S. House of Representatives (at least 218 votes) is required to impeach<span> a U.S. </span>President<span>, followed by a two-thirds majority vote in the Senate (at least 67 votes). The number of votes required make </span>impeachment <span>difficult. No American </span>President<span> has been removed from office by </span>impeachment<span>.</span>
Burgess Meredith was the man who played Penguin in the 1960's Batman TV show.
The main differences are that Paleolithic people lived in caves in nomadic hunter/gatherer societies, while Mesolithic and Neolithic people saw the birth of nations thanks to agricultural developments. The groups of people stopped being approximately 20 in size and people started living together on a larger scale.
