Some Research Questions Cannot Be Answered Using Human Experiments Because

question 11

Multiple Choice

Some research questions cannot be answered using human experiments because

• A) some studies would be impractical or unethical.
• B) randomization is often hard to achieve.
• C) double-blind studies are usually dangerous to participants.
• D) researchers know that their results usually will not be published.
• E) they are not a very effective way to learn about cause-and-effect relationships.

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Definitions:

Control Components

Elements in an electrical system used to regulate and guide the operation of machinery or circuits.

Pilot Devices

Controls or indicators used in a circuit to monitor, operate, or control the functioning of machinery or equipment.

Two-wire Control

A control circuit configuration using two wires to connect the control element, typically for simple on/off operations.

No-voltage Drop-out

A feature in electrical control circuits that causes the device to trip or shut off when the supply voltage falls below a certain level, enhancing safety.