What Kind of Attribute Is Assigned to an Attribute When

question 26

Multiple Choice

What kind of attribute is assigned to an attribute when no other value applies or when a value is unknown?

• A)Single-valued attribute
• B)Multi-valued attribute
• C)Derived attribute
• D)Null-valued attribute

---

Definitions:

ABAB Design

A type of experimental design where treatment and control conditions are alternated to determine their effect on the target behavior.

Symptom Exacerbation

The worsening or intensification of symptoms of a disease or condition.

Exacerbation Study

Research focused on determining factors that worsen symptoms or a condition, particularly in the context of chronic diseases.

Placebo

A substance with no therapeutic effect, used as a control in testing new drugs.