The following main variables are scored:
General cognitive ability: A measure for the ability to recognize patterns, understand implications, and to deduce logical inferences from figurative, verbal or numerical item material.
Logical reasoning: A measure of the ability to solve new problems using inductive thinking processes.
Verbal reasoning: A measure for the ability to understand the meaning of words and their underlying concepts, to relate them to one another, and to draw conclusions from them.
Numerical reasoning: The knowledge of basic arithmetical operations as well as the ability to derive mathematical solutions from them.
The main variables are calculated as factor scores based on the results of confirmatory factor analyses. In addition, the corresponding norm-referenced score including the confidence interval is also reported.