For me, intelligence is the capacity of an individual to deal effectively and to adapt well in his environment. My appreciation of intelligence is marked by those characteristics as well, and then some more. There are popular notions of the signs of intelligence, and these are some of it. These are some of the characteristics of intelligence according to my observation: Memory, focus, verbal and language competence, spatial/nonverbal competence, ability to think outside the box, having a sense of humor and by being curious. As you can see, the first four items in the list are similar to the key characteristics pointed out by the researcher, but not the last three items. The four items can be measured by the available psychometric tests: memory tests that challenge one’s own capacity to remember, focus exams that deal with attention spans, verbal and language exams that evaluate one’s cognitive level, as well as nonverbal exams have areas in conventional psychometric tests. The ability to think outside the box is usually a sign of being creative. Being creative, for me, is a sign that one is intelligent. Examining that characteristic entails an interview, may it be for children or adults. One should ask a difficult question that would force a person to think of radical solutions for that problem. The other characteristic for me that would entail intelligence is the sense of humor. Sense of humor implies wit, and wit implies intelligence. This would be tested easily: if the person is funny. It should be noted that not all smart people are funny though (although generally, funny people are smart people). Being curious is also a characteristic that implies intelligence because it implies that the person is interested to learn at all time. When the person asks questions about how things work, then the person is probably intelligent. Testing it would also require an interview or a conversation, at least, to mark if the person can be curious by asking relevant questions.