<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>
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The correct answer is
When he tried to yell for help they shut him up so the people don't find out that the African-Americans are being kidnapped.We can see that it's not A because the two of them were not separated, and it's not C because they also took women. It's not D because there was often a lot of violence involved.
The Limbic system is located under the cortex and is involved in learning, emotion, memory and motivation. <span />
Robert Fulton built the first American steamboat.