This uses item model 6 to create number series items - Identification of progressively evolving coefficients of change.
Usage
imSix(items)
Arguments
items
Number of items to generate.
Details
Non-linear progressive sequences which require a higher level of abstraction; the coefficient of change between two neighbouring elements is not invariable and its elements form a sequence. The coefficient sequences correspond to items from Item Families 1 and 3. Example: The coefficient of change between each pair of neighbouring elements in the sequence increases by 1. (2 4 7 11 16 (22))