Helen Cheng's research while affiliated with University College London and other places

Publications (22)

Article
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This study recruited a sample of 2,206 (1001 males and 1205 females) 15-18 year old students from urban and rural secondary schools in the Al Minia region of Egypt. They were tested for non-verbal reasoning ability with Raven’s Advanced Progressive Matrices (RAPM), and measured for head circumference and height. Intelligence was significantly corre...
Article
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This paper compiles cognitive test results for children in Ethiopia, Andhra Pradesh (India), Peru and Vietnam from multiple rounds of the Young Lives study. In this international project, the same cognitive tests were administered to children of the same age under standardized conditions, allowing comparisons between countries and between social, e...
Article
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This study was based on data for a sample of 1756 Egyptian primary school children (863 boys and 893 girls) aged 5–11 years assessed for intelligence with Raven’s Coloured Progressive Matrices (CPM). The results showed that boys obtained a slightly higher IQ than girls and had greater variance.
Article
The Coloured Progressive Matrices (CPM), a non-verbal reasoning test for children, was administered to a sample of 4785 primary school students aged 5-12 years in Sudan. Girls obtained higher average scores equivalent to an IQ difference of 3.56 points and showed greater variability than boys. Comparison with scores obtained in a similar study perf...
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Scores of a sample of 2,440 male and female Somalian school students aged 8 through 18 years on the Standard Progressive Matrices Plus (SPM+) are reported. The sample obtained a British-scaled IQ of 68. There was no statistically significant difference between the scores of the males and females. The variance was greater among the females than amon...
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This study reports data for the intelligence of 15 year olds in 42 provinces and cities of the Russian Federation assessed in the 2015 Programme for International Student Assessment (PISA) and their economic, social and geographical correlates. It was found that the average PISA scores of the provinces and cities were significantly correlated with...
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Data are reported for a standardization of the Coloured Progressive Matrices in Sudan. Boys obtained a higher average IQ of 2.7 points and showed greater variability. The sample obtained a British-scaled IQ of 81.5.
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Data are reported for non-verbal ability tested with Raven's Standard Progressive Matrices for a sample of 755 male and 622 female school children, 6 to 18 year old, from South Sudan. These were the children of refugees who were settled with their families in the area of Khartoum. There was no gender difference among 6 through 15 year olds, but amo...
Article
Full-text available
Data are presented for a sample of 1756 Egyptian primary school children (863 boys and 893 girls) aged 5 through 11 years assessed for intelligence with Raven's Coloured Progressive Matrices. The sample had an IQ of 85 according to British norms.
Article
This study reports the associations between the intelligence of children aged 8–10 years across thirty-one provinces and municipalities of the People's Republic of China and their economic and social correlates. It was found that regional IQs were significantly correlated at the p < 0.001 significant level with the percentage of Han in the populati...
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This study was based on two independent studies which in total consisted of 1812 school pupils aged 6-12 years in Saudi Arabia. Study I consisted of 1591 school pupils (609 boys and 982 girls) attending state schools, and Study II consisted of 211 boys with learning disabilities. Intelligence (measured using the Standard Progressive Matrices Plus f...
Article
Results are reported for intelligence assessed with the Advanced Progressive Matrices of a sample of 1502 students at an Egyptian university. The men obtained a British IQ of 103.8 and the women a British IQ of 101.0. The men students had greater variability than the women students.
Article
The intelligence of 1936 engineering students in three universities in Sudan was tested with the Advanced Progressive Matrices. The sample obtained an average British IQ of 93. Males obtained marginally higher average scores than females, equivalent to approximately 1.2 IQ points.
Article
Sex differences on the WISC-III are reported for the 13 subtests, the Verbal and Performance IQs, the four Index IQs and the Full Scale IQs in Taiwan and the United States. The sex differences are closely similar in the two samples with a correlation of .87 (p<.001) in the 13 subtests. Males obtained significantly higher Full Scale IQs in the two s...
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Full-text available
A study of sex differences in the intelligence of university students in Thailand tested with the Advanced Progressive Matrices found that men obtained a slightly higher score than women by .08d equivalent to 1.2 IQ points. The sample obtained a British IQ of 103. A meta-analysis of 22 studies of sex differences in the intelligence of university st...
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Data are presented for intelligence in twelve regions in Turkey showing that intelligence is highest in the west and lowest in the east. The west–east intelligence gradient is significantly correlated with regional differences in educational attainment and per capita income and negatively correlated with fertility, infant mortality and the percenta...
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This paper summarizes 22 studies of the IQs of 28 non-Han ethnic minorities compared with the Han in the People's Republic of China. The Han obtained higher average IQs than all of the non-Han ethnic minorities.
Article
Data are presented for a representative sample of 8,272 7 year-old children for a measure of behavioural difficulties in white, black, South Asian and Chinese children in the United Kingdom. The results showed that black children had more behavioural difficulties than whites, South Asian children had about the same behavioural difficulties as white...
Article
This study reports the differences in intelligence across thirty-one regions of the People's Republic of China. It was found that regional IQs were significantly associated with the percentage of Han in the population (r = .59), GDP per capita (r = .42), the percentage of those with higher education (r = 38, p<.05), and non-significantly with years...
Article
Data are presented from the UK Millennium Cohort Study for a sample of 14,860 5 year old British children giving the IQs of whites and racial minorities. Africans, Indians, Pakistanis and Bangladeshis obtained lower IQs than whites, while the IQ of the Chinese was higher. These group differences in IQ were consistent with the differences in educati...
Article
The authors conducted a systematic review on published studies to date to investigate the effect of fluoride exposure on children's intelligence quotient (IQ) scores. PSYCHINFO, Web of Science, MEDLINE, SCI, and the China National Knowledge Infrastructure (CNKI) search engines were employed for all documents published up to 2012, in English and in...

Citations

... A partir de lo anterior, la presente investigación se plantea el siguiente objetivo general: evaluar mediante el análisis factorial confirmatorio la unidimensionalidad del instrumento, y a través del análisis diferencial de los items de acorde al sexo y edad del test no verbal Matrices de Sanchez-Sanchez et al. (2015) en una muestra de estudiantes universitarios. Siendo de importancia, que hasta la fecha solo se cuentan con dos estudios comparativos en muestras de niños y adolescentes peruanos que utilizan el test Matrices Raven (Millones, Flores-Mendoza & Rivalles, 2015;Lynn, Cheng & Meisenberg, 2019), y no hay investigación alguna en universitarios peruanos. Por lo cual se procuró determinar las propiedades psicométricas, cumpliendo con los estándares para su uso concreto como los proporcionados por The Standards for Educational and Psychological Testing (American Educational Research Association, la American Psychological Association (APA) y el National Council on Measurement in Education (NCME, 2014). ...
... At this point, the measurement of skills, such as organising visual-spatial relations, perceiving shapes, colours and sizes, abstraction, reasoning and arithmetic perception becomes prominent in the test content and the reason behind males getting higher scores on the test is due to the fact that the test focuses on related skills (Johnson et al., 2008). In the associated literature, several studies reported that males show better scores in skills, like visualspatial perception, reasoning about shapes and designs, arithmetic and mathematical perception, abstraction and logical inference than females (Neisser et al., 1996;Härnqvist, 1997;Keith et al., 2008;Keith et al., 2011;Lejbak et al., 2011;Ziada et al., 2019;Jiang et al., 2020). ...
... Although the first normative data were collected in 1942, currently the most widely used norms come from a follow-up study conducted on 598 children from Dumfries, UK (1982). CPM has been used internationally, with norms from Spain (Raven, Court, Raven, 2011), Australia (Cotton et al., 2005), South Africa (Linstrom, Raven, & Raven, 2008), Brazil (Bandeira, Alves, Giacomel, & Lorenzatto, 2004), and countries in the Arab world such as Oman (Kazem et al., 2009), United Arab Emirates (Khaleefa & Lynn, 2008), Libya (Lynn, Abdalla, & Al-Shahomee, 2008), Sudan , and Egypt (Ziada, Metwaly, Bakhiet, Cheng, Lynn, 2017). ...
... For instance, the Ainu people in Japan have somewhat lower average IQ than the ethnic Japanese (Kura, Armstrong & Templer, 2014); Grigoriev & Lynn (2014) have found different average IQs for Kazakhs, Russians, and Uzbeks living in Kazakhstan. In Russia, average CA and per capita GDP of provinces and cities positively correlate with the percentage of ethnic Russians in the population (Lynn, Cheng & Grigoriev, 2017); in Vietnam, the percentage of ethnic Vietnamese (Kinh) within each province correlates with the general socioeconomic factor (S) at .74 (Kirkegaard & Pesta, 2018). Findings such as these are easily understandable given the substantial differences in average CA across nations (for the most recent review thereof, see Lynn & Becker, 2019). ...
... Many studies, especially those conducted in the Arab world, still use the UK norms to interpret CPM to generate IQ scores (e.g., Khaleefa & Lynn, 2008;Bakhiet & Lynn, 2015;Bakhiet et al., 2017), often referred to as the "Greenwich IQ" (Bakhiet et al., 2018). However, this practice may be problematic due to the questionable appropriateness of using norms from another country to interpret test scores even for "culturally fair" tests (Norman et al., 2011;Daugherty et al., 2017). ...
... También se observa una tendencia a que las diferencias por género tienden a disminuir a medida que aumenta la edad (H. Y.Chen, Lynn, y Cheng, 2016). Aunque la mayoría de los estudios muestran diferencias que se presentan como significativas, pero con un bajo tamaño del efecto, igual persisten interpretaciones que atribuyen una diferencia importante en los indicadores generales, sugiriendo incluso, que deberían utilizarse normas diferentes en niños y niñas(Slate, 1998).Estudios fuera del WISC, muestran resultados similares en las otras pruebas pertenecientes a la familia de las escalas Wechsler de inteligencia, como en la versión para población preescolar y para adultos (WPPSI y WAIS, respectivamente). ...
... En los últimos años se han evaluado las diferencias según sexo a través de las Matrices Raven en universitarios con puntuaciones mayores a favor de los varones (Abdel-Khalek & Flynn, 2015;Bakhiet, Al-Qudah, Essa, Abdelrasheed, Cheng & Lynn, 2016;Essa, Abdelrasheed, Bakhiet, Cheng, Dwieb & Lynn, 2016;Lynn, Cheng, Choi, Cho & Lee, 2018). Asimismo, otras investigaciones refieren una mejor puntuación del nivel de inteligencia en adultos de mayor edad que en los más jóvenes (Pérez, 2018;Rossi-Casé, Doná, Biganzoli & Llanos-Borja, 2018). ...
... This is evident when coding Cheung (2017), a research article which includes several variables and themes in the analysis that are situated under the broader theme non-cognitive abilities. Another example is *Lynn et al. (2016), whose results show that urban regions in China such as Shanghai and Beijing have remarkably high cognitive ability levels. This is the only factor emphasized and thus its only theme. ...
... There are reasons to expect that people with high levels of narcissism think that their brains and heads are bigger than those of others. For instance, brain volume (Nave et al., 2019;Pietschnig et al., 2015) and head circumference (Bakhiet et al., 2017) have been related to better performance on intelligence tasks and it seems reasonable to suggest that narcissistic individuals may overestimate the size of these body parts as a reflection of their perceived greater intelligence. Furthermore, in colloquial English, talking about a person as "big brained" is a reference to their intelligence, and referring to someone as being "big headed" is denoting how overconfident they are. ...
... En los últimos años se han evaluado las diferencias según sexo a través de las Matrices Raven en universitarios con puntuaciones mayores a favor de los varones (Abdel-Khalek & Flynn, 2015;Bakhiet, Al-Qudah, Essa, Abdelrasheed, Cheng & Lynn, 2016;Essa, Abdelrasheed, Bakhiet, Cheng, Dwieb & Lynn, 2016;Lynn, Cheng, Choi, Cho & Lee, 2018). Asimismo, otras investigaciones refieren una mejor puntuación del nivel de inteligencia en adultos de mayor edad que en los más jóvenes (Pérez, 2018;Rossi-Casé, Doná, Biganzoli & Llanos-Borja, 2018). ...