Stimulus Organism Response (S-O-R) Model
As you may already have realised, the S-R model is applicable to humans, S-O-R model is like an update to the same and introduces the idea that the organism may choose to respond to the same stimulus in different ways depending upon its state of mind.
For example a child who loves playing video games generally responds by playing (response 1) when is presented by the stimulus of a video game in front of him. If when the child plays the game, the mother gets mad at him then this response of the mother becomes a feedback for the child. The child now associates fear with playing video game in front of her. In future, whenever the mother is present due to the mental state of fear the same child will respond to video games by avoiding (response 2) them.