French psychologist Alfred Binet (1859-1911) took a different approach from most other psychologists of his day: He was interested in the workings of the 26 mind rather than the nature of mental illness.
答案：(B) normal
句中 rather than the nature of mental illness（而非精神疾病的本質）形成對比，可知 Binet 感興趣的是「正常」心智的運作，故填 normal；contrary（相反的）、detective（偵探的）、mutual（相互的）都無法與 mental illness 構成這組對照。
答對率 38%。
normal 太簡單，你可能因為「這麼容易不可能是答案」而去挑看起來高級的 contrary 或 mutual。這是考試心理造成的失分，與字彙量無關——選項裡出現特別簡單的字時，不要因為它簡單就先排除。
He was interested in the workings of the ___ mind rather than the nature of mental illness.（他感興趣的是…心智的運作，而不是精神疾病的本質）。rather than 前後必須是一對相對的概念，後面是精神疾病，前面自然是「正常」的心智。看懂 B，A 幾乎就自動決定了。
A rather than B（是 A 而不是 B）、instead of（而不是）、the workings of（…的運作方式）、normal／abnormal（正常的／異常的）。
French psychologist Alfred Binet (1859-1911) took a different approach from most other psychologists of his day: He was interested in the workings of the 26 mind rather than the nature of mental illness. He wanted to find a way to measure the ability to think and reason, apart from education in any particular field.
In 1905 he developed a test in which he 27 children do tasks such as follow commands, copy patterns, name objects, and put things in order or arrange them properly. He later created a standard of measuring children's intelligence 28 the data he had collected from the French children he studied. If 70 percent of 8-year-olds could pass a particular test, then 29 on the test represented an 8-year-old's level of intelligence.
From Binet's work, the phrase "intelligence quotient" ("IQ") entered the English vocabulary. The IQ is the ratio of "mental age" to chronological age times 100, with 100 30 the average. So, an 8-year-old who passes the 10-year-old's test would have an IQ of 10/8 times 100, or 125.