In his 1967 paper, Arbitrary and Natural Reinforcement , Charles Ferster proposed classifying reinforcement into events that increase frequency of an operant as a natural consequence of the behavior itself, and events that are presumed to affect frequency by their requirement of human mediation, such as in a token economy where subjects are "rewarded" for certain behavior with an arbitrary token of a negotiable value. In 1970, Baer and Wolf created a name for the use of natural reinforcers called "behavior traps".  A behavior trap requires only a simple response to enter the trap, yet once entered, the trap cannot be resisted in creating general behavior change. It is the use of a behavioral trap that increases a person's repertoire, by exposing them to the naturally occurring reinforcement of that behavior. Behavior traps have four characteristics:
On the other hand, there are instances which show the problems with improved and advanced technology or the solution for one problem with the help of technology is giving rise to another problem. Instead of taking care personally we are sending sms or giving a call on important occasions which were attended personally in olden days. With the use of same internet children are getting addicted to online games and their physical activities and exercises are becoming considerably less. The same social networks are creating rivalry between best friends and couples are getting divorced. The same aviation technology is giving health problems for their workers and creating serious environmental threats. With the heavy usage of fertilizers soil is losing its natural fertility and several varieties of plants became extinct.