Across the Many fields Concerned with interactivity , Including information science , computer science , human-computer interaction , communication , and industrial design , there is little agreement over the meaning of the term interactivity , ALTHOUGH all are related to interaction with computers and other equipment with A user interface .
Multiple views on interactivity exist. In the “contingency view” of interactivity, there are three levels:
- Not interactive, when a message is not related to previous messages;
- Reactive, when a message is related only to one previous message; and
- Interactive, when a message is related to a number of previous messages and to the relationship between them. 
One body of research has made a strong distinction between interaction and interactivity. As the suffix ‘ity’ is used to form nouns that denote a quality or condition, this body of research has defined interactivity as the ‘quality or condition of interaction’.    These researchers suggest that the distinction between interaction and interactivity is important since interaction may be present in any given setting, but the quality of the interaction varies from low and high.
man to human communication
Human communication is the basic example of interactive communication which involves two different processes; Human to human interactivity. Human-Human interactivity is the communication between people.
On the other hand, people communicate with new media . According to Rada Roy, “The Human Computer Interaction model may consist of 4 main components which consist of HUMAN, COMPUTER, TASK ENVIRONMENT and MACHINE ENVIRONMENT. A computational model of a computer system that can be used to compute a computer system.  Human to Human Interactivity, which is based on anthropomorphic definitions. For example, Complex systems that detect and react to human behavior are sometimes called interactive. Under this perspective, interaction includes responses to human physical manipulation and movement, body language, and / or changes in mental states .
Fernando Arturo Torres defined interactivity as, “a particular medium’s ability to facilitate the properties necessary in an ideal conversation” (“Towards A Universal Theory of Media Interactivity: Developing A Proper Context,” 1995, “Definition of Interactivity,” para. 1). His research determined that interactivity should be defined by “how well a medium facilitates two-way communication rather than by the technology of the medium.”
Human to artifact communication
In the context of communication between a human and an artifact , interactivity refers to the artifact’s interactive behavior as experienced by the human user. This is a translation of the original text of the article. For example, the interactivity of an iPod is not its physical shape and color (its so-called ” design “), its ability to play music, or its storage capacity-it is the behavior of its user interface as experienced by its user. This includes the way the user moves their finger on his input.
An artifact’s interactivity is best perceived through use. A bystander can imagine how it interacts with the use of it, it is only through experienced use that its interactivity is fully experienced and felt. This is due to the kinestheticnature of the interactive experience. It is similar to the difference between watching and driving. It is only through the driving that one can experience and “feel” how this car differs from others.
New Media academic Vincent Maher defines interactivity as “the relationship constituted by a symbolic interface between its referential, objective functionality and the subject.” 
The term ” look and feel ” is often used to refer to a computer system’s user interface . Using this metaphor , the “look” refers to its visual design, while the “feel” refers to its interactivity. Indirectly this can be regarded as an informal definition of interactivity.
For a more detailed discussions of how interactivity has-been conceptualized in the human-computer interaction literature, and how the phenomenology of the French philosopher Merleau-Ponty can shed light on the user experience, see (Svanaes 2000).
In computer science , interactive refers to software which accepts and responds to input from people-for example, data or commands. Interactive software includes most popular programs, such as word processors or spreadsheet applications . By comparison, noninteractive programs Examples of these include compilers and batch processing applications. If the response is complex enough it is said that the system is conducting social interaction and some systems try to achieve this through the implementation of social interfaces .
Also, there is the notion of user interaction, like the Rich UI .
Various authoring tools are available for creating various kinds of interactivities. Some of the most common platforms for creating interactivities include Adobe Flash and Microsoft Silverlight . Harbinger’s Elicitus and Articulate’s Engage. ELearning makes use of a concept called an interaction model . Using an interaction model, any person can create interactivities in a very short period of time. Some tools like Harbinger’s Raptivity come with readymade interaction models that can be customized easily without any programming.
Some of the interaction models presented with authoring tools fall under various categories like games, puzzles, simulation tools, presentation tools, etc., which can be completely customized.
- Haptic (disambiguation)
- Human factors
- Interactive art
- Interactive computing
- Interactive media
- Interaction design
- Sonic interaction design
- Interaction Model
- Virtual reality
- Jump up^ Sheizaf Rafaelidefined Interactivity as an expression of the extent that in a given series of communication exchanges, any third (or later) transmission (or message) , 1988
- Jump up^ Sedig, K .; Parsons, P .; Babanski, A. (2012). “Towards a Characterization of Interactivity in Visual Analytics” (PDF) . Journal of Multimedia Processing and Technologies, Special Issue on Theory and Application of Visual Analytics . 3 (1): 12-28 . Retrieved July 29, 2013 .
- Jump up^ Parsons, P .; Sedig, K. (2014). “Adjustable properties of visual representations: Improving the quality of human-information interaction”. Journal of the American Society of Information Science and Technology . 65 (3): 455-482. Doi : 10.1002 / asi.23002 .
- Jump up^ Liang, H.-N .; Parsons, P .; Wu, H.-C .; Sedig, K. (2010). An exploratory study of interactivity in visualization tools: ‘Flow’ of interaction ‘ (PDF) . Journal of Interactive Learning Research . 21 (1): 5-45 . Retrieved July 29, 2013 .
- Jump up^ Rada, R .; Michailidis, Antonios (1995). Interactive media . New York: Springer-Verlag. p. 12. ISBN 0-387-94485-0 .
- Jump up^ Vincent Maher – Media in Transition »Towards a definition of interactivity for Critical Theory