Hi!
Well, some of the items on this set are easy...the easier items will be removed from the test. So, everything is in the testing phase; we need to find out if there are items which are too easy for this test and items which are probably not solvable with the information given (or items which allow more than one clear solution/more than one relevant solution).
The test will contain about 100 items, the set you got here is only the first volunteer set. And there will be a spatial part too...people will be able to do one of the parts only too of course.
With above average we mean an IQ at about 130 with SD 15, which is about 2% of the population.
It's said that the IQ can "change" (develop) until an individual is 25 years old (approx.); most of the scientists agree that there is a hereditary factor and a environmental factor and the last one may influence the actual IQ value of an individual.
But since the IQ is measured with tests, it's also proven that if one person takes two IQ tests, with certain time between the two tests, the IQ result changes. The difference between the two results might be even more drastically, if an individual takes two different IQ tests with a certain time between them.
That's actually because there are different types of standardized IQ tests.
So you have pure matrice-tests (like the Raven Matrices Test) and tests (like the IST) which contain matrices, sequences, verbal items and mental calculation...some even contain general knowledge tests and memory tests (I guess you know that these are things one can easily practice and don't really have anything to do with IQ).
Such tests are there because when the IQ was invented (actually it wasn't even called IQ at that point) it was only there to test if a child was ready for school/ready for a certain class...actually Binet invented that. When Stern came up with the whole IQ-thing, Binet dissociated from it since he didn't like the idea of adding up some numbers and getting an IQ value from that.
So there are differences between certain testresults because there are different tests out there which have items which are easy to practice and because the tests have completely different items (and therefore they aren't measuring the same thing) rather than something like experience or practice.
You can only practice within your own potential.
Otherwise you would be able to rasie your IQ by 100 points with practice.
The differences between IQ testresults are in the 7-15 points area, while people who are scoring in the average range are more likely to have higher result when taking there second test than people who already scored quite high in their first test.
"Brainjogging", and all these practice books won't really help you to rise your IQ drastically.
Because of different SD, different items, validity etc. it's a coincidence if an indivual gets the same score in two tests.