Randall and His Colleague Are Designing a Study to Assess

question 288

Multiple Choice

Randall and his colleague are designing a study to assess how self-esteem changes as we age.His colleague really wants to use a longitudinal design,but Randall feels that a cross-sectional design would be better.Randall begins presenting a case with all the reasons that the longitudinal design is bad.Which of the following would he NOT say?

• A) It takes a long time and a lot of money/resources.
• B) It doesn't control for cohort effects.
• C) It doesn't explain age change.
• D) Many participants drop out over the course of the study.

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Definitions:

Standard Deviation

A statistic that quantifies the dispersion or spread of a set of numerical data from its mean.

Symmetric

Characterized by or exhibiting symmetry; having identical shape, size, and position on both sides of a dividing line.

Unimodal

Describing a distribution with a single peak or mode.

Stem-And-Leaf Display

A graphical method of displaying quantitative data to show its distribution, using digits to represent the stems and leaves.