David Wechsler authored 'The Measurement of Adult Intelligence' in 1939. This work introduced the Wechsler-Bellevue Intelligence Scale, which revolutionized the field by providing a more comprehensive assessment of adult intelligence compared to previous tests that were primarily designed for children. His work remains a cornerstone of modern psychometrics and clinical psychological assessment.

Alfred Binet's pioneering work on individual intelligence testing was adapted by American psychologists, such as those involved in the Army Alpha and Beta tests, to create group-administered assessments. These tests were essential for the rapid classification of recruits during World War I. While Binet himself did not create the military tests, his foundational concepts of mental age and standardized testing were the direct precursors to these large-scale applications.

David Wechsler developed these widely used intelligence tests to address limitations in earlier assessments. His scales are notable for providing separate scores for verbal and performance intelligence, rather than relying solely on a single IQ score, and they remain standard tools in clinical psychology.

The original Stanford-Binet IQ formula is (Mental Age / Chronological Age) * 100. To increase the resulting quotient, an individual needs a higher mental age relative to their chronological age. Therefore, appearing 'younger' (having a lower chronological age) while maintaining a high mental age results in a higher IQ score.

Alfred Binet was a French psychologist who is best known for developing the first practical intelligence test, the Binet-Simon scale. Born in Nice, France, he spent his professional career in Paris, where he conducted his groundbreaking research on cognitive abilities and mental development.

The Hawthorne studies, time and motion studies, and revery obsession studies were all historical efforts aimed at understanding and improving industrial productivity. Conversely, the Stanford-Binet intelligence scale is a psychometric test designed to measure cognitive abilities and intelligence in individuals, particularly children, and is not a study related to workplace productivity or industrial efficiency.

The Graduate Record Examination (GRE) is primarily designed as an aptitude test. It aims to predict a student's potential for success in graduate-level academic programs by assessing general verbal, quantitative, and analytical writing skills, rather than measuring mastery of a specific subject matter learned in a previous course.

The history of standardized testing involves various researchers. While the SAT was originally developed by the College Board, academic literature often cites researchers like Detterman and Frey for their extensive work in psychometrics and the analysis of intelligence testing metrics used in such assessments.

An IQ score of 100 is the mathematical result of having a mental age that is exactly equal to one's chronological age. In the context of standardized testing, this indicates that the individual's cognitive development is at the expected level for their age group. It serves as the baseline or average score in most intelligence testing models.

Binet's approach to intelligence testing was grounded in the concept of mental age. He selected items that could be successfully completed by the majority of children at a specific chronological age. This ensured that the test provided a normative baseline, allowing researchers to compare an individual child's performance against the average capabilities of their age-matched peers.