If Originally There Were X Atoms of Radioactive Isotope Present

question 104

Multiple Choice

If originally there were X atoms of radioactive isotope present and now there are only X/8 atoms, how many half-lives have elapsed?

• A) 3
• B) 1
• C) 4
• D) 2

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Definitions:

Differential Reinforcement

A behavior modification technique that reinforces desired behaviors while withholding reinforcement for undesired behaviors.

Differential Reinforcement

The process of reinforcing specific behaviors while not reinforcing other behaviors, used to increase desired behaviors and decrease undesired ones.

DRL

Differential Reinforcement of Low Rates, a behavior modification technique used to encourage low rates of behaviors by providing reinforcement only if the behavior occurs at or below a prescribed rate.

DRO

Differential Reinforcement of Other behavior; a strategy where reinforcement is provided for any behavior that is not the undesired target behavior.