Table 2.

Overview of STM capacity categories and various STM-types (substructures) with associated test sets and concepts.

Capacity category	Description	Capacity STM-types (substructures)	Description
Progressive capacity	PC	PCvi + PCvv	Capacity measures on visual and verbal simultaneously and successively increasing amount of information
Multi capacity	MC	MCviP + MCviF + MCvvR	Capacity measurement of visual and verbal concurrent information
Sensory capacity	SC	SCvi + SCvv	Capacity measure of visual and verbal glimpses (1–2 s) simultaneously and increasing amount of information
Visual channel capacity	Visual	PCvi + MCviF + SCvi	Several types of visual capacity in a single target
Verbal channel capacity	Verbal	PCvv + MCvvR + SCvv	Several types of verbal capacity in a single target
Raven (extract RAPM)	Raven	Twelve matrices	Capacity for increasing non-verbal complexity

Capacity STM-types (substructures): PCvi, progressive visual-iconic; PCvv, progressive visual-verbal; MCviP, visual-iconic capacity picture; MCviF, visual-verbal multi capacity figure; MCvvR, visual-verbal recognition capacity; SCvi, visual sensory capacity; SCvv, verbal sensory capacity; Raven, non-verbal intelligence (extract). RAPM, Raven’s Advanced Progressive Matrices (12 selected).