Primary reinforcers are stimuli that are naturally rewarding and do not need to be learned. Food, water, and sex are all primary reinforcers, while money is a secondary reinforcer, which means that it is rewarding because it can be exchanged for primary reinforcers.

The limbic system is a complex network of brain structures that is involved in emotion, motivation, and memory. The amygdala, hippocampus, and hypothalamus are all part of the limbic system, while the thalamus is not.

Dopamine is a neurotransmitter that is involved in reward and motivation. It is released when we experience something pleasurable, such as eating a delicious meal or winning a game. Dopamine also plays a role in attention and focus.

Cortisol is a hormone that is released in response to stress. It helps to mobilize the body's resources to deal with the stressor. Cortisol also plays a role in motivation, as it can increase arousal and focus.

The hypothalamus is a brain structure that is involved in a variety of functions, including hunger and thirst. It contains neurons that are sensitive to changes in blood sugar levels and other factors that indicate the body's need for food and water.

Intrinsic motivation is the desire to engage in a behavior for its own sake, rather than for an external reward. Studying for a test because you want to learn the material is an example of intrinsic motivation, while working a job because you need the money is an example of extrinsic motivation.

Extrinsic motivation is the desire to engage in a behavior in order to obtain an external reward. Working a job because you need the money is an example of extrinsic motivation, while going to the gym to lose weight is an example of intrinsic motivation.

Drives are internal states that motivate an organism to engage in certain behaviors. Hunger, thirst, and sex are all examples of drives.

Incentives are external stimuli that motivate an organism to engage in certain behaviors. Food, water, and money are all examples of incentives.

Drive theory, incentive theory, and Maslow's hierarchy of needs are all theories of motivation. Drive theory states that drives are internal states that motivate an organism to engage in certain behaviors. Incentive theory states that incentives are external stimuli that motivate an organism to engage in certain behaviors. Maslow's hierarchy of needs states that humans have a hierarchy of needs, and that the most basic needs must be met before the higher needs can be met.

Biological motivations are motivations that are based on the body's needs. Hunger, thirst, and sex are all examples of biological motivations.

Psychological motivations are motivations that are based on the mind's needs. Achievement, power, and affiliation are all examples of psychological motivations.

Social motivations are motivations that are based on the need to interact with others. Affiliation, altruism, and competition are all examples of social motivations.

Cognitive motivations are motivations that are based on the need to learn and understand. Curiosity, exploration, and learning are all examples of cognitive motivations.

Emotional motivations are motivations that are based on the need to experience emotions. Love, hate, and anger are all examples of emotional motivations.