Selection Bias Can Occur If Volunteers Only Are Used in a Study

question 28

True/False

Selection bias can occur if volunteers only are used in a study.

---

Definitions:

Raw IQ Scores

A measurement of an individual's cognitive abilities without adjustments for age or any other factors.

Flynn Effect

The observed substantial and long-term increase in both fluid and crystallized intelligence test scores measured in various parts of the world over the 20th century.

Flynn Effect

The significant and enduring rise in scores for both fluid and crystallized intelligence tests across various regions globally throughout the 20th century.

Mean IQ Score

The average score derived from standardized tests designed to measure human intelligence.