Professor Taylor Arranged for People of Different Ages to Complete

question 137

Multiple Choice

Professor Taylor arranged for people of different ages to complete a test of manual dexterity.She then compared manual dexterity across different age levels.The professor's research best illustrates a

• A) longitudinal study.
• B) normal curve.
• C) cross-sectional study.
• D) standard deviation.

---

Definitions:

Caffeine Intake

The consumption of the stimulant caffeine, found in coffee, tea, and many soft drinks, which affects the central nervous system.

Dependent Variable

The variable in an experiment that is expected to change in response to manipulations of the independent variable.

Independent Variable

"A manipulated experimental factor; the variable that the experimenter changes to see what its effects are."

Longitudinal Design

A special kind of systematic observation, used by correlational researchers, that involves obtaining measures of the variables of interest in multiple waves over time.