Advertising agencies have developed a number of techniques to influence people’s emotions.

Our moods and feelings are also continuously changing, making it more difficult to predict how we feel at different times. Sometimes, an emotion can descend upon us but disappear shortly afterward.

Automatic emotions tend to be slow to develop and equally slow to dissipate, and they are often the result of a conscious cognitive behavior, such as weighing the odds, reflection, or contemplation

Conscious emotions happen rapidly, typically within a fraction of a second and, likewise, may dissipate just as quickly

This level is where parts of the brain that are prewired to respond automatically to events happening in the physical world.

This level is where next level are the brain processes that control everyday behavior.

This level is where the brain processes involved in contemplating

This level responds rapidly, making judgments about what is good or bad, safe or dangerous, pleasurable or abhorrent

Examples of this level are the following: well-learned routine operations such as talking, typing, and swimming

This level entails conscious thought where people generalize across events or step back from their daily routines.

One way of using the model is to think about how to design products in terms of the three levels.

Refers to making products look, feel, and sound good.

is about use and equates to the traditional values of usability

is about considering the meaning and personal value of a product in a particular culture

In many situations, interfaces may inadvertently elicit negative emotional responses, such as anger

Affective computing is concerned with how to use computers to recognize and express emotions in the same way as humans do

Affective computing involves designing ways for people to communicate their emotional states, through using novel, wearable sensors and creating new techniques to evaluate frustration, stress, and moods by analyzing people’s expressions and conversations

emotional AI has emerged as a research area that seeks to automate the measurement of feelings and behaviors by using AI technologies that can analyze facial expressions and voice in order to infer emotions.

Technology interventions have also been developed to change people’s behaviors in other domains besides commerce, including safety, preventative healthcare, fitness, personal relationships, energy consumption, and learning.

The global concern about climate change has also led a number of HCI researchers to design and evaluate various energy-sensing devices that display real-time feedback. One goal is to find ways of helping people reduce their energy consumption, and it is part of a larger

research agenda called sustainable HCI.

Anthropologymorphism is the propensity people have to attribute human qualities to animals and objects.

Furnishing technologies with personalities and other human-like attributes can make them more enjoyable and fun to interact with. They can also motivate people to carry out various activities, such as learning.

Well-designed interfaces can elicit good feelings in people.

Expressive interfaces can provide reassuring feedback to users as well as be informative and fun.