European Stars And Stripes (Newspaper) - March 12, 1987, Darmstadt, Hesse                                Page 4 the stars and stripes thursday March 12,1987 caffeine hinders introverts studies say chicag Jap that Jolt of caffeine in a mom ing cup of Coffee or Tea improve an impulsive extroverted person s work on Complex reasoning tasks but docs the opposite for thoughtful introverts two psychology professors said. Caffeine in doses equivalent to one to three cups of Coffee helps both types of people perform simple men Ial jobs the psychologists said they have found in re search Over seven years. They released their findings tuesday. When the mental tasks become More difficult such us proofreading for grammatical mistakes impulsive people who the pc on snap decisions perform better in the morning with caffeine they said we found people who describe themselves a less impulsive people who take their time to make a Deci Sion their performance was severely hindered by Caf Feine in the morning said William Revelle a psychology professor at Northwestern University in Evanston. Revelle said his findings on caffeine s effects on thinking have been refined from research begun at Northwestern seven years ago with studies on 700 peo ple. Those findings recently have been corroborated by psychologist Krister Anderson who worked with Rev Etle on the earlier research in a separate study of 100 people finished last fall Anderson an assistant professor it Colgate univer sity in Hamilton n.y., said she and Ryvelle contend that introverted people Are hindered by caffeine in the morning because they already Are More aroused and awake then. Caffeine appears to  this Type of per son interfering with their reasoning ability she said. Impulsive extroverts Are helped by a boost of Caf Feine because it lakes them longer to Wake up mentally in he morning she said. In her study Anderson said 50 extroverts and 50 introverts were Given two mental tasks one simple one Complex before consuming caffeine and after doses ranging from i Milligram to 4 milligrams per kilogram of body weight the High dose would be like drinking two to three cups of co tee. She said. A cup of Coffee has an average of 63 to 115 milligrams of caffeine depending on brewing method Tea would have 30 to 60 milligrams and an 8-ounce Glass of chocolate milk for breakfast would average 5 milligrams according to food and drug administration figures. The simple task required participants to pick out a specific target letter every Lime it appeared on a Page. The Complex task was answering practice questions from the graduate record exam involving word Ana logic sentence completions and antonyms. Basically everybody tends 10 get a Titch the higher the dose of caffeine if the task is extremely simple Anderson said. On the Complex task the extroverts performance improved with higher doses of caffeine hut the Intro verts work got worse she said. Revelle said his most recent research has been aimed at trying to determine the types of jobs Likely to he Hurt by caffeine consumption or overstimulation. Generally he said being too Alert or too aroused whether from caffeine or other stimulation hinders a person s ability to do jobs requiring Short term Mem Ory and Complex reasoning some past studies have linked heavy Coffee con sumption to heart disease and pancreatic cancer but those findings have been disputed. A study published in october in the new England journal of Medicine found that heavy Coffee drinkers were 2vj times More Likely to suffer heart disease than people who did t d rink Coffee but or Charles h. Hennekens of Harvard univer sity criticized the study s woefully Small Sample  one of the study s authors or. Thomas a. Pearson of Johns Hopkins University in Baltimore agreed that More research was needed before any recommendations could be made. Prop fan of the future appt Wio a new technology prop ran Jet engine stands out from traditional engines during its first test in the United Stales on a Boeing 727. The engine expected to be on jets of the 909, is said to halve fuel  and to provide the same Speed us that attained by the use of Standard engines chess Champion Marks birthday with 28 wins Forest Park 111. A the youngest . Chess grandmaster began celebrating his 23rd birthday Early wednesday by finishing off 31 simultaneous opponents beating 28, including a computer and holding the others to draws. Joel Benjamin walked from Board to Board in the exhibition that began tues Day night taking anywhere from five seconds to two minutes to Advance a piece it was a reasonably difficult Field said Benjamin who explained that such multiple matches help keep his wits Quick and flexible. The largest Field he has competed against had so people in it. Kenneth Marshall Secretary of the Oak Park Forest Park chess club organized the exhibition and was one of the skilled Amateur players beaten by Benjamin. I could have resigned after the eighth move said Marshall. He had me beaten and i could have Given up then but i stuck around because i wanted to make it at least s1 a move. After All it Tost $ 15 to  the exhibition Al the Community Cen Ter in this Chicago suburb was Small potatoes compared to he National open in Las vegas nev., where Benjamin will be competing for a first prize of up to $4,000. Beginning Friday. Benjamin has been playing chess seriously since he was 8 and competed in his first tournament at id. He won his grandmaster s rating last year joining Only about 20 other americans at the elite level. Unlike some other grandmasters who use the same opening at each Board in multiple play Benjamin used a wide variety of openings during the 4w-hour exhibition. It reduces the boredom Factor he explained. It ids me play As Many games As possible Al once. It also keeps me from facing the exact same defense at table after table. That really drives me up the  the first of Benjamin s opponents tuesday night resigned after 12 moves the youngest opponent Marc Wilson 10, was checkmate in 23 moves. The oldest Vic Swanson. 71, of Oak Park was one of the most tenacious Only re signing after 40 moves. It took Benjamin Only 37 moves to checkmate the computer which was operating on a Complex German designed Chest program. Only one player really gave me Trou ble Benjamin said. He had me on the ropes and if he d played the next logical move he d have had me but he got greedy and made another move before the necessary one. That set him up for something he had t foreseen and i beat him  depending on the ranking Organiza Tion Benjamin is listed As either the sixth Best or fourth Best player in the United states jazz promoter Jaffe Dies new Orleans la. A Allan Philip Jaffa who founded preservation Kail in the Early 1960s to save tradition Al new Orleans jazz from extinction has died of cancer. He was is. Jaffa was manager of the Hall when he died. Kids give parents higher rating than adults do Washington a through the eyes of kids american parents arc doing a much belter Job of mis ing them than the adults themselves believe a new Survey shows. Philosophers have Long debated the meaning of happiness and they have yet to find one said the study of 1,000 youngsters released tuesday by the Roper organization. But whatever happiness May be american youths appear to have  the poll conducted through one on one interviews with youngsters age 8 to 17, shows children approve of the emphasis parents place on everything from school grades to hobbies friends and television. Yet interestingly enough parents themselves and the larger adult Public do not agree with Young people s assessments Here the poll said. A 9bfi Roper Survey of adults found that when asked the same question parents fault themselves for placing too Little emphasis on almost All these  the Young people surveyed were asked to choose from a list of things that would make their Home life belter. Leading the list with 39 percent of those polled were getting along belter with Brothers and Sisters and talking openly with parents. Younger children were most concerned with sibling relations while for 44 percent of the teen agers the no. 1 ingredient for improving Home life is to be treated As an adult. Another place kids differed with adults was in family size. Roper found in an earlier Survey that adults Felt the Ideal family size was one or two children. The kids who come from families averaging 3.1 children Felt three or More to be Ideal. Burns w. Roper whose organization conducted the poll for the american chicle group said it was the first time such an in depth Survey was made among children and Len Agurs. The sampling error was about 3 percentage Points either Way of the majority 62 percent said children do no but lit or worse in school if their mothers work 7 percent thought they do Betler and 26 percent said worse. But 40 percent though children of working mothers gel into More trouble and 47 Pera it thought they Are More Independent. The students were asked to assign a Grade to i hair school on a scale of a to f. The result a-29 percent b 48 percent c-16 percent d-4 percent f-2 percent. Sixty one percent thought sex education should be taught in the Home 55 percent said school and 9 per cent said it should be left to religious schools. Only 1 percent said it should not be taught at All