Reinforcement schedules are patterns that define how often reinforcement will occur for a desired behavior. 

For a variable-interval schedule in operant conditioning, the desired behavior is reinforced after what seems to be unpredictable amount of time. This resembles receiving a rewarding text message after persistently checking one's phone. There's no way of being able to determine how long the waiting period will be between texts. A simple way to remember the difference between ratio and interval schedules is to keep in mind ratio refers to number of responses while interval refers to time. These terms are modified by the schedule being specified as variable (varying) or fixed (specified).  

Classical conditioning was illustrated by Pavlov's dog experiment. Pavlov observed canine reflexively as they salivated at the site of food. He used an initial neutral stimulus and was able to condition the dogs to associate the once neutral (now conditioned) stimulus with the site of food. Ultimately the dogs would no longer require the actual site of food to salivate because the conditioned stimulus sufficed to induce the response. Conversely, operant conditioning was illustrated in Skinner and Thorndike's law of effect, where behaviors that were rewarded were more likely to be repeated than those that had negative consequences.

This is operant conditioning because behaviors are controlled through reinforcement. In this case, a reward, or positive reinforcement, is being presented. This is a variable-interval schedule because reinforcement is presented after varying intervals of time.

Scott decides to pinch Victoria every time she utters a swear word. In other words, Scott is administering an aversive stimulus (the painful pinching) in order to decrease the frequency of Victoria's swearing (an unwanted behavior in Scott's opinion). This is an example of positive punishment.

Generalization errors occur when a particular reinforced or conditioned behavior leads to a reaction to stimulus (or an attempt at behavior, for operant conditioning) that is superficially close to, but not actually, the desired condition. Examples of this are children overgeneralizing the rules of grammar, dogs learning to bark at (or be friendly to) everyone they meet rather than just the targeted individuals, and a person with a food aversion feeling sick when something smells vaguely like the food they had the reaction to.

Negative reinforcement occurs when a behavior is reinforced via the subtraction of something negative or undesirable from the organism's environment. This could mean the removal of pain or unpleasant labor, a reduction in stress, or an end to some ongoing negative experience. Note that, since the effect of this is to increase the likelihood of the behavior, rather than to decrease it, this is not the same as punishment.

B.F. Skinner based his research off of Thorndike's law of effect and is considered to be the father/founder of operant conditioning (the type of learning in which the effects of an action determine whether it will be repeated in the future). He is most famous for Skinner's box-- a box in which he placed animals to conduct operant conditioning experiments.  

Ivan Pavlov is one of the earliest psychologists known for classical conditioning and is particularly famous for his experiments in which he got dogs to associate food with sounds, leading them to salivate when there was a bell even when there was not food present. 

John Watson was a classical conditioning psychologist who is most famous for his "Little Albert" experiment in which he trained a young boy to be afraid of a rat (or anything like looked like a white rat) because he made an unpleasant noise while presenting the rat. This research indicated that humans too could be classically conditioned.

Edward Thorndike came up with the law of effect, which states that positive consequences increase the likelihood that an action will be repeated and negative consequences decrease the likelihood that it will.

Sigmund Freud is not a psychologist associated with conditioning at all. Instead, he came up with psychodynamic theories that explained people's actions in terms of conflicts in their unconscious. 

B.F. Skinner based his research off of Thorndike's law of effect and is considered to be the founder of operant conditioning (the type of learning in which the effects of an action determine whether it will be repeated in the future). He is most famous for Skinner's box-- a box in which he placed animals to conduct operant conditioning experiments.

Edward Thorndike came up with the law of effect, which states that positive consequences increase the likelihood that an action will be repeated and negative consequences decrease the likelihood that it will.

Ivan Pavlov is one of the earliest psychologists known for classical conditioning and is particularly famous for his experiments in which he got dogs to associate food with sounds, leading them to salivate when there was a bell even when there was not food present. 

John Watson was a classical conditioning psychologist who is most famous for his "Little Albert" experiment in which he trained a young boy to be afraid of a rat (or anything like looked like a white rat) because he made an unpleasant noise while presenting the rat. This research indicated that humans too could be classically conditioned.

Sigmund Freud is not a psychologist associated with conditioning at all. Instead, he came up with psychodynamic theories that explained people's actions in terms of conflicts in their unconscious. 

Carl Rogers is also not a psychologist associated with conditioning. He developed a person-centered method of therapy.

Edward Thorndike came up with the law of effect, which states that positive consequences increase the likelihood that an action will be repeated and negative consequences decrease the likelihood that it will.

Ivan Pavlov is one of the earliest psychologists known for classical conditioning and is particularly famous for his experiments in which he got dogs to associate food with sounds, leading them to salivate when there was a bell even when there was not food present. 

John Watson was a classical conditioning psychologist who is most famous for his "Little Albert" experiment in which he trained a young boy to be afraid of a rat (or anything like looked like a white rat) because he made an unpleasant noise while presenting the rat. This research indicated that humans too could be classically conditioned.

B.F. Skinner based his research off of Thorndike's law of effect and is considered to be the founder of operant conditioning (the type of learning in which the effects of an action determine whether it will be repeated in the future). He is most famous for Skinner's box-- a box in which he placed animals to conduct operant conditioning experiments.  

Sigmund Freud is not a psychologist associated with conditioning at all. Instead, he came up with psychodynamic theories that explained people's actions in terms of conflicts in their unconscious. 

B.F. Skinner is considered to be the founder of operant conditioning (the type of learning in which the effects of an action determine whether it will be repeated in the future). He is most famous for Skinner's box-- a box in which he placed animals to conduct operant conditioning experiments.

Classical conditioning can be thought of as learning through association and operant conditioning as learning through effect. Positive, negative, and punishment conditioning as methods do not exist.