Which of the Following Is a Threat to External Validity

question 35

Multiple Choice

Which of the following is a threat to external validity in a longitudinal design?

• A) attrition
• B) uniqueness of the study environment
• C) practice effects
• D) cohort effects

---

Definitions:

Prospective Memory

The element of memory that facilitates the remembering of actions or intentions scheduled for a forthcoming time.

Perform Actions

Executing or carrying out tasks or operations through physical or mental efforts.

Retrograde

Pertaining to moving or occurring in a backward direction; often used in the context of astronomy to describe the apparent backward motion of planets as observed from Earth, or in medicine to refer to memory loss for periods before a traumatic event.

Episodic Memory

A type of long-term memory that involves the recollection of specific events, situations, and experiences, including contextual details like time and place.