Marijuana use A 20072008 survey of teens conducted by the Partnership for a Drug-Free America found that 33% of 6511 U.S. teenagers surveyed reported use of marijuana. Th e report states, With 95% confi dence, we can say that between 31.4% and 34.6% of all American teenagers have used marijuana.4 Explain to someone who knows no statistics what the phrase 95% confi dence means in this report
Memory and Forgetting External events Sensory memory Working memory (short term) Long term memory Sensory memory holds the words herd for a few short seconds and lets you register them. Researchers believe that there is a sense memory for each sense. (Auditory and visual are the most studied) Short-term memory is the active processing of information. It associates new and old information/solves problems Duration: longer than in sensory memory, rehearsal helps. Forgetting is decay, if not rehearsed it just fades away. Interference is being replaced by new info. Capacity: 7+/- rule (4+/- 1) at one point you can take on about 5-9 facts. Capacity can be increased by chunking- breaking things up into meaningful pieces for yourself Short term memory to working memory- they are not e
