Which of the following is a main characteristic of a laboratory... | Agrigyan

Psychologist Robert Peck expanded Erikson's theory and identified four major psychological adjustments of middle adulthood:

• Socializing vs. Sexualizing in human relations: Redefining men and women as individuals and companions rather than viewing them primarily in terms of sex and physical attractiveness.
• Valuing wisdom vs. Valuing physical powers: Compensating for declining physical stamina by using accumulated wisdom and life experience.
• Emotional flexibility vs. Emotional impoverishment: Shifting emotional investments from one person or activity to another as children leave home or friends pass away.
• Mental flexibility vs. Mental rigidity: Remaining open to new ideas and perspectives rather than being set in one's ways.

Assertion (A) is true: According to Jean Piaget, children aged 7 to 11 years are in the Concrete Operational stage, during which they acquire the concept of conservation (understanding that physical properties like mass, volume, and substance remain the same despite superficial changes in outward appearance or shape).
Reason (R) is false: Children in the concrete operational stage CAN reverse their thinking. Reversibility (the mental capacity to undo an action or imagine an object returning to its original state) is precisely the cognitive mechanism that enables conservation. It is preoperational children (ages 2-7) who lack reversibility.

Reasoning skills involve analytical thinking, logical comparison, problem solving, and deductive/inductive rationale:
Comparing speed (bus vs. cycle) stimulates causal and relative speed reasoning (Option 2).
Comparing capacity (bus vs. car) stimulates volume, size, and logical reasoning (Option 4).
Identifying and drawing a missing part stimulates analytical visual-spatial reasoning (Option 1).
Simply showing a flashcard and asking for the name of the vehicle requires only rote memory and vocabulary recall (labeling), with NO engagement of higher-order reasoning skills (Option 3).