Memory can be viewed as an active information-processing system that receives, organises, stores and recovers information. There are three stages to the sequence in which information is processed in memory; this is encoding, storage and retrieval.
Encoding is the entire process of converting information in a useable form or code that can be stored in memory.

Storage is the information that is retained in the memory, and retrieval is the process of locating and recovering the stored information from memory so that we are consciously aware of it.
When the human memory works effectively, the encoding can lead to storage and the storage enables retrieval. Matthew will use this process during the course of the information he registers in his memory of the surrounding stimuli, of the course of the wedding reception.
Matthew walks into the wedding reception and looks around, he notices the decorations, the band the guests; he becomes aware of the smells and textures of the floors he walks on. The information processed, is stored in the sensory memory.

Sensory memory can be described as “the entry point of memory” or “the initial stage of the memory system in which all of the stimuli that bombard our senses are retained in their original form for a brief time.” If Matthew directs his attention to the information surrounding him long enough it can be transferred to the short-term memory. The information Matthew hears such as people dancing on the dance floor, people talking and music playing, will be processed in a sub system of sensory memory called the echoic memory, for auditory information, while the visual images that Matthew will process will be stored in the iconic memory system.

The short term memory system will receive information from the sensory memory, usually holding around 7 plus or/minus pieces of information for an average of 18-20 seconds. As Matthew takes in the wedding reception over the duration period, he becomes...