data("SPISA")vignette("raschtree", package = "psychotree").The full list of items in questionnaire 20 is given below. Politics: Who determines the rules of action in German politics according to the constitution? -- The Bundeskanzler (federal chancellor). What is the function of the second vote in the elections to the German Bundestag (federal parliament)? -- It determines the allocation of seats in the Bundestag. How many people were killed by the RAF (Red Army Faction)? -- 33. Where is Hessen (i.e., the German federal country Hesse) located? -- (Indicate location on a map.) What is the capital of Rheinland-Pfalz (i.e., the German federal country Rhineland-Palatinate)? -- Mainz. Who is this? -- (Picture of Horst Seehofer.) Which EU institution is elected in 2009 by the citizens of EU member countries? -- European Parliament. How many votes does China have in the UNO general assembly? -- 1. Where is Somalia located? -- (Indicate location on a map.)
History: The Roman naval supremacy was established through... -- ... the abolition of Carthage. In which century did the Thirty Years' War take place? -- The 17th century. Which form of government is associated with the French King Louis XIV? -- Absolutism. What island did Napoleon die on in exile? -- St. Helena. How many percent of the votes did the NSDAP receive in the 1928 elections of the German Reichstag? -- About 3 percent. How many Jews were killed by the Nazis during the Holocaust? -- About 6 Million. Who is this? -- (Picture of Johannes Rau, former German federal president.) Which of the following countries is not a member of the EU? -- Croatia. How did Mao Zedong expand his power in China? -- The Long March.
Economy:
Who is this?
-- (Picture of Dieter Zetsche, CEO of Mercedes-Benz.)
What is the current full Hartz IV standard rate (part of the social welfare) for adults?
-- 351 Euro.
What was the average per capita gross national product in Germany in 2007?
-- About 29,400 Euro.\
What is a CEO?
-- A Chief Executive Officer.
What is the meaning of the hexagonal ``organic'' logo?
-- Synthetic pesticides are prohibited.
Which company does this logo represent?
-- Deutsche Bank.
Which German company took over the British automobile manufacturers Rolls-Royce?
-- BMW.
Which internet company took over the media group Time Warner?
-- AOL.
What is the historic meaning of manufacturies?
-- Manufacturies were the precursors of industrial mass production.
Culture:
Which painter created this painting?
-- Andy Warhol.
What do these four buildings have in common?
-- All four were designed by the same architects.
Roman numbers: What is the meaning of CLVI?
-- 156.
What was the German movie with the most viewers since 1990?
-- Der Schuh des Manitu.
In which TV series was the US president portrayed by an African American actor for a long time?
-- 24.
What is the name of the bestselling novel by Daniel Kehlmann?
-- Die Vermessung der Welt (Measuring The World).
Which city is the setting for the novel
Natural sciences: Why does an ice floe not sink in the water? -- Due to the lower density of ice. What is ultrasound not used for? -- Radio. Which sensory cells in the human eye make color vision possible? -- Cones. What is also termed Trisomy 21? -- Down syndrome. Which element is the most common in the Earth's atmosphere? -- Nitrogen. Which kind of tree does this leaf belong to? -- Maple. Which kind of bird is this? -- Blackbird. Where is the stomach located? -- (Indicate location on a map of the body.) What is the sum of interior angles in a triangle? -- 180 degrees.
SPIEGEL Online (2009). Studentenpisa -- Alle Fragen, alle Antworten.
In German. Accessed 2010-10-26.
raschtree## data
data("SPISA", package = "psychotree")
## summary of covariates
summary(SPISA[,-1])
## histogram of raw scores
hist(rowSums(SPISA$spisa), breaks = 0:45 + 0.5)
## See the following vignette for a tree-based DIF analysis
vignette("raschtree", package = "psychotree")Run the code above in your browser using DataLab