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While state-dependent memory may seem rather similar to context-dependent memory, context-dependent memory involves an individual's external environment and conditions (such as the room used for study and to take the test) while state-dependent memory applies to the individual's internal conditions (such as use of substances or mood).
The context may refer to the context in which the information was encoded, the physical location or surroundings, as well as the mental or physical state of the individual at the time of encoding. This principle plays a significant role in both the concept of context-dependent memory and the concept of state-dependent memory.
In psychology, context-dependent memory is the improved recall of specific episodes or information when the context present at encoding and retrieval are the same. In a simpler manner, "when events are represented in memory, contextual information is stored along with memory targets; the context can therefore cue memories containing that contextual information". [1]
The connections that are formed between the encoders internal state or the situation and the items to be remembered are State-dependent. In a 1975 study by Godden and Baddeley the effects of State-dependent learning were shown. They asked deep sea divers to learn various materials while either under water or on the side of the pool.
Context effect: That cognition and memory are dependent on context, such that out-of-context memories are more difficult to retrieve than in-context memories (e.g., recall time and accuracy for a work-related memory will be lower at home, and vice versa). Cross-race effect
These two phenomena, the mood congruity effect, and mood-state dependent retrieval, are similar to the context effects which have been traditionally observed in memory research. [44] It may also relate to the phenomena of state-dependent memory in neuropsychopharmacology.
"THE CAT" is a classic example of context effect. We have little trouble reading "H" and "A" in their appropriate contexts, even though they take on the same form in each word . A context effect is an aspect of cognitive psychology that describes the influence of environmental factors on one's perception of a stimulus. [ 1 ]
Transfer-appropriate processing (TAP) is a type of state-dependent memory specifically showing that memory performance is not only determined by the depth of processing (where associating meaning with information strengthens the memory; see levels-of-processing effect), but by the relationship between how information is initially encoded and how it is later retrieved.