exam 2 Flashcards
without memory (pros and cons)
- without memory, there would be no recollection of past experiences and no emotion associated with those experiences
- pros: no hurt or anger over past transgressions
- cons: no ability to reminisce or savor the good experiences or to learn from past experiences (every learned behavior would have to be relearned); no ability for language, others would be like strangers, you would be a stranger to yourself
memory
learning [of thoughts, feelings, and behavior] that has persisted over time; a process of storing information and retrieving information for later use
memory metaphors (5)
the stamping of an impression into a block of wax; a storage box into which we pour our experiences; a library; a tape recorder; if the mind is a computer, then memory is an information-processing system
steps for memory (3)
- encoding: the process by which we get information into the brain (not all experiences make their way into the brain)
- storage: the process by which we retain information, assuming it is encoded (some for a fraction of a second, some for a lifetime)
- retrieval: the process whereby we get information out of our brain for a later use (the information is there but we have to be able to retrieve it)
Atkinson and Shiffrin’s model (definition)
the process of memory (formation of memories) occurs in a three-stage process: sensory memory, short-term memory, long-term memory
Atkinson and Shiffrin’s model (description of stages)
- sensory memory (first stage): we first record information as a fleeting sensory experience; literal copies of sensory information that are held for brief periods of time (from a fraction of a second up until three seconds (ex. blinking))
- short-term memory (second stage): memory is then encoded in our memory system through rehearsal; has limits (can hold only a few (about seven) items for a brief period of time (twenty seconds))
- long-term memory (third stage): information is moved to a relatively permanent and limitless storehouse for later retrieval (only some memories go here); can hold vast quantities of information for years; includes not only facts and experiences, but also things like our accumulated knowledge, skills, and experiences (ex. tying shoes)
Atkinson and Shiffrin’s model (revisions)
- some information skips stages one and two (enters into long-term memory without conscious awareness)
- short-term memory is thought of as working memory; information is actively processed (new stimuli are associated with existing memories, and problems are actively worked through and solved)
types of information processing (2)
- automatic processing: much information processing occurs without conscious awareness and with little or no effort
- effortful processing: requires deliberate, conscious attention for the information to be processed
effortful processing effects (serial position, recency, primacy)
- serial position effect: we tend to recall best the last and the first items in a list
- recency effect: immediately after learning, we recall the last (most recent) items the best
- primacy effect: after a delay, we recall the first items that we learned the best
types of sensory memory and what would happen without them (2)
- iconic memory is a fleeting photographic memory (a mental trace lingers in our mind after a stimulus has been removed from view (retina); problem is that memory fades quickly)
- without iconic memory, you would lose track of what you see with every blink of the eye
- echoic memory is a fleeting auditory memory (holds only a few items but lasts for several seconds; adaptive advantage)
- without echoic memory, speech would be difficult to understand
Sperling’s (1960) experiment explanations (2) and suggestion
- One explanation is that people could only register so much information in a single glance.
- Another explanation is that all of the information registered, but the image faded from memory before the information could be reported.
- This suggests that visual information registers in the brain and can be recalled in amazing detail for a brief period of time.
(experiment: flashing letters on a screen; participants could only recall about five items no matter how many letters there were)
duration and capacity (storage capacity, chunking) limits of short-term memory
- duration limits: short-term memories have a limited life if they are not actively (meaningfully) processed (can avoid forgetting by repeating information silently or aloud)
- capacity limits: at any given moment, we can consciously process a very limited amount of information
- storage capacity: once short-term memory is filled to capacity, the storage of new information requires existing information to be discarded or replaced
- chunking: although short-term memory can only hold a limited amount of items, these items can be grouped into chunks, and it enables us to process short-term memory with more efficiency
elaborative rehearsal (long-term memory encoding)
a strategy that involves thinking about material in more meaningful ways and associating that information with other memories (the more deeply you process information, the more likely you are to recall it at a later time)
semantic and visual coding (format), procedural and declarative memory (content) (long-term memory storage)
- semantic coding: when we process verbal information, we store the meaning of the information, not the specific words
- visual coding: a mental picture is generated of an object or a scene
- procedural memory: our stored knowledge of learned habits and skills. (ex. how to drive, swim, etc.); stored without conscious recollection
- declarative memory contains our semantic memories for facts about the world. (ex. president); also involves episodic memories that we have about ourselves (ex. birthday); information that we can consciously know and declare
ways of retrieving memory (recall, recognition, relearning)
- recall is the ability to retrieve information that is not in conscious awareness (ex. fill in the blank test)
- recognition is the ability to identify information that was previously learned (ex. multiple choice, true/false)
- relearning is the ability to spend less time learning material for a second time
context-dependent and state-dependent memory
- context-dependent memory: people find it easier to retrieve information from memory when they are in the same situation or context in which the information was originally learned
- state-dependent memory: it is oftentimes easier to recall something when our state of mind is the same at testing as it was at encoding
Godden and Baddeley’s (1975) experiment
They presented scuba divers with a list of words in two settings. Half of the scuba divers were presented with the words fifteen feet underwater. The other half were presented with the words on the beach. The divers were either tested in the same setting in which they learned or in the opposite setting. The results showed that the divers recalled 40% more of the information when the material was learned and retrieved in the same context.
forgetting
an adaptive, economical aspect of human memory