According to the longitudinal study by Schaie,which test of primary mental ability actually showed increases into old age?

A) Word meaning
B) Word fluency
C) Perceptual speed
D) Spatial orientation

Longitudinal Study

A research design that involves repeated observations of the same variables (such as subjects) over short or long periods of time.

Primary Mental Ability

Fundamental cognitive skills that include language comprehension, spatial visualization, and problem-solving, considered crucial for intellectual functioning.

Schaie

Refers to Warner Schaie, a developmental psychologist known for his research on cognitive development across the lifespan, including the Seattle Longitudinal Study.