Week 5 Lecture 2February 9, 2017Long-Term Memory Prt. 1What is Long-Term Memory?Information retained for a longer period of time.Music demooProvides really great/strong cues to LTM.oNot only based on how well you encode the information but what type of triggerhelps you retrieve the information.oSmell.How much Information can we Hold in LTM?How could we study LTM capacity?oIs it even possible?oVery difficult, we don’t even know how the information is stored.Capacity of LTMStores large amounts of information.No one knows exact number.Perhaps 10 to the power of 13 pieces of informationResearchers tried to go back and count the number of connections in the brain(synapses).We’re holding info not just in terms from one neuron to another but we holdinformation in networks.o10 to the power of 13 synapses in the cerebral cortex (Landauer)How much information can we hold in LTM?Common (mis)perception:“I consider a man’s brain originally is like a little empty attic, and you have to stock itwith such furniture as you choose…It is a mistake to think that that little room has elasticwalls and can distend to any extend. Depend upon it, there comes a time when for everyaddition of knowledge you forget something that you knew before.”-Sherlock Holmes (A Study in Scarlet by Arthur Conan Doyle)LTM DurationWill you remember anything from this class?1 year from now?5?20?
50?How About Queen’s Campus?Duration of LTMAlumni’s recall of street names and landmarks of their college town.o1 to 46 years laterBahrick (1983)46 years after graduationoAlumni remembered 40% of information.oSimilar to alumni 6 years out.oThe information you remember tends to drop and then level out.oThe information 6 years later is the information that tends to stick around.How long do we store memories? DurationWill you remember anything from this class?