Richard Lynn's Massaged IQ Data
Anyone who uses Richard Lynn's
national IQ
values should be aware that this data is "massaged"; either that, or
Lynn doesn't know elementary arithmetic. Of course, I did not have time
to go through
all of the studies referenced by Lynn, so I
manually checked his reported numbers from Buj (1981), a study on
national European IQ levels, which I have personally read when writing
my
Greek and European IQ page.
The first column below are the original numbers from Buj (1981)
taken from [1] and cross-checked against my own reading of the original
paper. The second column are the numbers reported in
IQ and the Wealth of Nations.
Lynn rounds most numbers to the closest integer, but Italy's score is
rounded down (0.8->0), Austria's score is rounded down (0.5->0),
Ireland's score is "rounded" up (0.2->1), Norway's score is 1.8 lower
than the real one, Greece's score is 2.4 lower than the one reported
by Buj (1981). All in all, 5 errors in 19 numbers from a
single study.
Holland 109.4 109 rounded
Germany 109.3 109 rounded
Poland 108.3 108 rounded
Sweden 105.8 106 rounded
Italy 103.8 103 truncated
Austria 103.5 103 truncated
Switzerland 102.8 103 rounded
Portugal 102.6 103 rounded
Norway 101.8 100 -1.8
Denmark 100.7 101 rounded
Hungary 100.5 101 rounded
Czechoslovakia 100.4 100 rounded
Spain 100.3 100 rounded
Belgium 99.7 100 rounded
Greece 99.4 97 -2.4
Ireland 99.2 100 +0.8
Finland 98.1 98 rounded
Bulgaria 96.3 96 rounded
France 96.1 96 rounded
[1] http://members.shaw.ca/delajara/NationalIQs.html
Buj, V., 1981, Average IQ values in various European countries,
Personality and Individual Differences, 2, 168-169.