lecture_Ch13[1]

lecture_Ch13[1] - Drugs and Behavior Marijuana PSY 291...

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Drugs and Behavior Marijuana PSY 291
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Marijuana Marijuana consists of the dried and crushed leaves, flowers, stems, and seeds of the hemp ( Cannabis sativa) plant. THC (delta-9-tetrahydrocannabinol) is the primary mind-altering ingredient in marijuana. Currently, marijuana grows wild in many U.S. states © Mitchell Brothers 21st Century Film Group/ShutterStock, Inc.
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History and Trends in Marijuana Use The hemp plant, also called cannabis or marijuana, has been used around the world for thousands of years. Sometime around 7000 - 8000 BCE, the first fabric is believed to have been woven from dried hemp weed. Early records of marijuana use: - China 2737 B.C. (medical treatment) - India (religious ceremonies) - Ancient Greeks (hemp cakes) - Scythians (breathing the smoke in steam baths)
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History and Trends in Marijuana Use In 1619 a law was passed in Jamestown, Virginia Colony, (1639 Massachusetts) which required farmers to grow hemp. At Mount Vernon, George Washington grew hemp as his primary crop in 1797. Thomas Jefferson grew hemp as a secondary crop at Monticello. In 1840, medicines with a cannabis base were available in U.S. pharmacies.
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History and Trends in Marijuana Use 1937 Congress passed the Marihuana Tax Act. - Regulated the use of marihuana classified as narcotic 1970 Comprehensive Drug Abuse Prevention and Control Act. - Marijuana not a narcotic, but Schedule I drug
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? Questions and Answers ? Q. How much more potent is marijuana today than in the 1960s and 1970s? A.5 times more potent B.10 times more potent C.20 times more potent D.50 times more potent
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Types of drugs used in the past month, aged 12 or older in 2008. It is the most highly abused type of illicit drug. The average age of first use was 17.8 years.
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Past-year marijuana initiates among persons aged 12 or older: 2002–2008.
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Mean age at first use of marijuana among past-year marijuana initiates aged 12 to 49: 2002–2008.
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Percentage of 8th, 10th, and 12th grade students using marijuana in the last 12 months.
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Trends in disapproval of use for 12th graders. Source: "Monitoring the Future: National Survey Results on Drug Use, 1975– 2008." NIH Publication No. 09-7402.
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Past month comparative trends in perceived availability, risk, and use of marijuana by 12th graders.
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Current Use - Major Factors Media Parental Model - Teens 40% more likely to use if parent ever used - Twice as likely if parents used last year Perceived risk – most important Peer influences – group motivated behavior Availability - Distributed primarily via social networks - 58% shared, not paid for
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Additional Influencing Factors Structural factors - Age, gender, family background, religious beliefs Social and interactional factors
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This note was uploaded on 12/03/2011 for the course PSY 291 taught by Professor Michalkraszpulski during the Fall '11 term at Wright State.

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lecture_Ch13[1] - Drugs and Behavior Marijuana PSY 291...

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