Which of the following aspects of cognition is assumed to increase throughout a person's life span?

Fluid intelligence involves the ability to think abstractly and solve novel problems, independent of acquired knowledge. Unlike crystallized intelligence, fluid intelligence often peaks in early adulthood and may decline with age as cognitive processing speed and working memory capacity decrease.

Visual integration refers to the ability to combine visual information from different sources to form a coherent perception. This aspect of cognition does not necessarily improve with age; instead, it can remain stable or decline, particularly in older adults who may experience difficulties in visual processing.

Iconic memory is a type of sensory memory that retains visual information for a brief period. This aspect does not typically increase with age and is generally believed to remain stable or decline due to the limitations in processing speed and attention in older adults.

Working memory is the capacity to hold and manipulate information over short periods. Research shows that working memory capacity often declines with age, as older adults may struggle with multitasking and retaining information in the short term.