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The CT scan was introduced in the 1970s and quickly became one of the most widely used methods of imaging. A CT scan can be performed in under a second and produce rapid results for clinicians, with its ease of use leading to an increase in CT scans performed in the United States from 3 million in 1980 to 62 million in 2007.
One of the theories concerning autism is the EMB (extreme male brain). This theory considers autistic people to have an "extreme male brain". In a study [33] from 2015, researchers confirmed that there is a difference between male and female in mental rotation task (by studying people without autism): males are more successful. Then they ...
It is theorized that, in terms of evolution, babies focus on women for food, although the preference could simply reflect a bias for the caregivers they experience. Infants do not appear to use this area for the perception of faces. Recent fMRI work has found no face selective area in the brain of infants 4 to 6 months old. [33]
Most studies that have investigated the impact of gender on presentation and diagnosis of autism spectrum disorder have not differentiated between the impact of sex versus gender. [19] There is some evidence that autistic women and girls tend to show less repetitive behavior and may engage in more camouflaging than autistic males. [20]
Sex and gender differences in autism exist regarding prevalence, presentation, and diagnosis. Men and boys are more frequently diagnosed with autism than women and girls. It is debated whether this is due to a sex difference in rates of autism spectrum disorders (ASD) or whether females are underdiagnosed.
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Psychometrics is a field of study specifically dedicated to psychological measurement and involves two main tasks: (i) constructing instruments and procedures for measurement; and (ii) the development and refinement of theoretical approaches to measurement. Brain-based intelligence tests are concerned with both of these aspects.
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