0.21 Concentration and emotions are important factors in intelligence  (Page 12/13)

As adults age from 20-74 their IQ (Wechsler Adult Intelligence Scale) declines steadily (Kaufman, Reynolds and Mclean (1989). The verbal IQ actually stays about the same but it is performance IQ that decreases. From the postulates in this paper the conclusion would therefore be that verbal IQ is somehow related to emotions. Performance IQ is clearly not related to emotions because it tests mostly visual abilities. Verbal isn’t likely to go down because the things it tests have to do with emotion and emotional control of attention. You cannot control how effective you are doing visual stuff, however because it requires concentration to visualize objects because there is less motivation to visualize then there is to just think. Thinking is easier than visualizing because people are used to thinking about anything, however they usually only visualize things they want to visualize, not things that are going to be tested on the IQ exam. That is, you can use emotion to control thought but you cannot use emotion to control your basic intelligence as would be reflected in visual ability tests (performance IQ).

The “willpower” of adults won’t decrease as adults age. The willpower can direct a mind for under 20 second periods, and under 20 seconds is the time that it takes to do most intellectual tasks. Like a math problem. They could repeat the focus they put in every 20 seconds, “spike” their mind every 20 seconds or so to maintain this intelligence. The things on the performance test don’t require that much focus, either you know them or you don’t. Note that three of the verbal tests test mention attention or concentration specifically (which relate to willpower which relates to emotion as already stated). And the other parts of the verbal test measure things which are also going to relate to emotion such as information acquired from culture (you are emotionally interested in your culture) and ability to deal with abstract social conventions, rules and expressions (you are emotionally interested in social events) and verbal reasoning (tests things that occur in everyday life which you are emotionally attached to). The performance test on the other hand doesn’t test things that are likely to go down because of increased emotion. The performance test tests things that are more intellect related than emotion related, that is visual things require a more intellectual, flexible mind to move objects around in your head. While the verbal subtests just require some motivation to perform (only one component of verbal tests working memory (which isn’t that emotional and wouldn’t be subject to changes in concentration) - one component wouldn’t have a significant impact on the result).

Wechsler Adult Intelligence Scale

Verbal Subtests

Information

Degree of general information acquired from culture (e.g. Who is the premier of Victoria?)

Comprehension

Ability to deal with abstract social conventions, rules and expressions (e.g. What does - Kill 2 birds with 1 stone metaphorically mean?)