In the Model of Hierarchical Complexity, which stage follows Preoperational?

• A. Primary
• B. Abstract
• C. Formal
• D. Systematic

Answer: (A)

In the Model of Hierarchical Complexity, tasks are ordered by how many and how complex the rules are that someone must apply. After the Preoperational level, the next stage is Primary. This stage involves applying a single, stable rule to tasks—it's the first step up from very simple, single-context actions, seen when someone can consistently follow one straightforward rule in concrete situations.

Higher stages require handling multiple rules or dimensions at once, which is why Abstract (working with symbols and relationships beyond concrete objects), Formal (hypothetical-deductive reasoning), and Systematic (coordinating many components) are more advanced. So the immediate next level after Preoperational is Primary, making it the best answer. For example, sorting objects by a single criterion like color in a consistent way demonstrates the single-rule organization characteristic of the Primary stage.