Southeast Asians are Natives of Thailand, Cambodia, Vietnam, Malaysia, Indonesia, the Philippines and Borneo. Their distinctive racial identity has been confirmed by the genetic analysis made by Cavalli-Sforza, Menozzi, and Piazza (1994) in which these peoples constitute a genetic “cluster.” They have some genetic affinity with East Asians with whom they are to some degree interbred, but the flattened nose and epicanthic eye-fold are less prominent.
1. IQ of Indigenous Southeast Asians
2. IQ of Southeast Asians in Holland and the United States
3. Brain Size Differences Between Southeast Asians and Europeans
1. IQ of Southeast Asians in Southeast Asia.
The median IQ of Southeast Asians is 87. The average IQ in Vietnam is higher at 97. The reason is that Vietnamese are hybrids between Southeast Asians and East Asians (Cavalli-Sforza et al., 1994, p.234), which gives them an intermediate IQ between the two original races.
Table 7.1. IQs of Southeast Asians
| Row | Country | Age | N | Test | IQ | Ver | Vis | Reference |
| 1 | Burma | 6-13 | 93 | DAM | 107 | 107 | Schuster, 1971 | |
| 2 | Cambodia | 3-5 | 4,015 | PPVT | 65 | 65 | Naudeau et al., 2011 | |
| 3 | Indonesia | 5-12 | 1,149 | DAM | 86 | 86 | Thomas & Shah, 1961 | |
| 4 | Indonesia | 5-Adult | 520 | CPM | 87 | Bleichrodt et al., 1980 | ||
| 5 | Indonesia | 4 | 139 | PPVT | 87 | 87 | Soewondo et al., 1989 | |
| 6 | Indonesia | 6-8 | 483 | CPM | 87 | Hadidjaja et al., 1998 | ||
| 7 | Indonesia | 7-Adult | 50 | SPM | 79 | Rindermann & te Nijenhuis, 2012 | ||
| 8 | Indonesia | EDUC | 86 | Meisenberg & Lynn, 2011 | ||||
| 9 | Laos | 5-12 | 22 | K-ABC | 90 | Boivin et al., 1996 | ||
| 10 | Laos | Adults | 22 | Matrix Analogies Test | 91 | Boivin et al., 1996 | ||
| 11 | Malaysia | 7-12 | 3,151 | SPM | 89 | Chaim, 1994 | ||
| 12 | Malaysia | 20 | 175 | EFT | 85 | 85 | Kuhnen et al., 2001 | |
| 13 | Malaysia | 8-15 | EDUC | 97 | Meisenberg & Lynn, 2011 | |||
| 14 | Philippines | 12-13 | 203 | SPM | 86 | Flores & Evans, 1972 | ||
| 15 | Philippines | 8-15 | EDUC | 82 | Meisenberg & Lynn, 2011 | |||
| 16 | Philippines | 12 | NNAT | 94 | Vista & Care, 2011 | |||
| 17 | Singapore | 12 | 190 | SPM | 93 | Lynn, 1977b | ||
| 18 | Thailand | 7-12 | 1,385 | CPM | 82 | Malakul, 1957 | ||
| 19 | Thailand | 7-12 | 892 | DAM | 98 | 98 | Talapat & Suwannalert, 1966a | |
| 20 | Thailand | 7-14 | 1,438 | CPM | 82 | Talapat & Suwannalert, 1966b | ||
| 21 | Thailand | 7-11 | 70 | WISC | 88 | Rajatasilpin et al., 1970 | ||
| 22 | Thailand | Adults | 1,462 | CPM | 72 | Chou & Lau, 1987 | ||
| 23 | Thailand | 6-11 | 104 | Piagetian | 87 | Opper, 1977 | ||
| 24 | Thailand | 9-11 | 1,358 | CPM | 91 | Pollitt et al., 1989 | ||
| 25 | Thailand | 6-13 | 3,846 | TONI | 90 | Thai Institute of Public Health, 1998 | ||
| 26 | Thailand | Adults | 400 | SPM | 90 | Phatthrayuttawat et al., 2000 | ||
| 27 | Thailand | 10 | 427 | TONI | 75 | Sungthong et al., 2002 | ||
| 28 | Thailand | 5-11 | 900 | CPM | 106 | Phatthrayuttawat et al., 2003 | ||
| 29 | Thailand | 7-12 | 396 | CPM/DAM | 98 | 97 | Sangtongluan, 2004 | |
| 30 | Thailand | 6-12, 13-18 | 6,285 | TONI | 85 | Ruangdaraganon, 2004 | ||
| 31 | Thailand | 12-18 | 5,702 | APM | 105 | Sukhatunga et al., 2006a | ||
| 32 | Thailand | 6-11 | 3,848 | CPM | 96 | Sukhatunga et al., 2006b | ||
| 33 | Thailand | 6-16 | 3,300 | WISC-III | 95 | Wanitrommani et al., 2004 | ||
| 34 | Thailand | 13-15 | 319 | TONI | 88 | Isaranurug et al., 2006 | ||
| 35 | Thailand | 7-9 | 100 | CPM | 87 | Nimmalangkun, 2006 | ||
| 36 | Thailand | 7-11 | 390 | CPM | 94 | Sroythong, 2008 | ||
| 37 | Thailand | 7-12 | 748 | CPM | 94 | Thavornsuwanchai, 2008 | ||
| 38 | Thailand | 9 | 560 | CPM/WISC-III | 81 | 91 | 87 | Pongcharoen et al., 2011 |
| 39 | Thailand | 6-14 | 5,993 | TONI | 88 | Aekplakorn, 2009 | ||
| 40 | Thailand | 6-15 | 72,780 | SPM | 97 | Thai Department of Mental Health, 2011 | ||
| 41 | Thailand | EDUC | 91 | Malloy, 2014d | ||||
| 42 | Vietnam | 8-12 | 47 | DAM | 99 | 99 | Mayer, 1966 | |
| 43 | Vietnam | 8 | 311 | CPM | 82 | Watanabe et al., 2005 | ||
| 44 | Vietnam | 8 | 1,000 | PPVT | 95 | 95 | Glewwe et al., 2012 | |
| 45 | Vietnam | 5 | 1,747 | PPVT | 82 | 82 | Glewwe et al., 2012 | |
| 46 | Vietnam | 5 | 1,602 | PPVT | 85 | 85 | Behrman et al., 2013 | |
| 47 | Vietnam | 12 | 976 | PPVT | 102 | 102 | Fink & Rockers, 2014 | |
| 48 | Vietnam | 8 | 469 | CPM/WISC-III | 83 | Nga et al., 2011 | ||
| 49 | Vietnam | 11 | 60 | CogAT | 97 | Rindermann et al., 2013 | ||
| 50 | Vietnam | EDUC | 94 | Meisenberg & Lynn, 2011 | ||||
| 51 | Vietnam | EDUC | 102 | OECD, 2013 |
2. IQ of Southeast Asians in Holland and the United States
The median IQ is 93, which is slightly higher than the value of 87 found in Southeast Asians in their home countries. The main reasons are probably a better diet and a migratory selection.
Table 7.2. IQs of Southeast Asians in the United States and the Netherlands
| Ethnicity | Age |
N |
Test |
g |
Reference | |
|
1 |
Filipino | 6-14 |
140 |
PM |
96 |
Porteus, 1937 |
|
2 |
Filipino | 10-14 |
305 |
NV |
89 |
Smith, 1942 |
|
3 |
Filipino | 10 |
138 |
PMA |
91 |
Werner et al., 1968 |
|
4 |
Filipino | 16 |
4,147 |
STAS |
93 |
Brandon et al., 1987 |
|
5 |
Filipino | 9-25 |
263 |
Varions |
87 |
Flynn, 1991 |
|
6 |
Indonesian | 6-10 |
84 |
NV |
94 |
Tesser et al., 1999 |
|
7 |
Vietnamese | 12-16 |
391 |
SPM |
94 |
Flynn, 1991 |
3. Brain Size Differences between Southeast Asians and Europeans
Table 7.3. Brain site (cc) differences of Europeans and Southeast Asians
|
Europeans |
Southeast Asians |
Difference |
Reference | |
|
Mean (Sd) |
Mean (Sd) | |||
|
1 |
1,426 | 1,393 |
33 |
Gould, 1981 |
|
2 |
1,369 (35) | 1,332 (49) |
37 |
Smith & Beals, 1990 |
|
3 |
1,319 | 1,217 |
102 |
Jurgens et al., 1990 |
Children from Cambodia (Southeast Asians)
References for the whole page « Race differences in intelligence. An evolutionary Analysis » Chapter 7, Richard Lynn, Washington Summit Publisher, 1st edition 2006 and 2nd edition 2015.