Simplify the Expression, If Possible $$\left( \frac { 1 } { 27 } \right) ^ { - 2 / 3 } - \left( \frac { 1 } { 9 } \right) ^ { - 1 / 2 }$$

question 147

Multiple Choice

Simplify the expression, if possible. $$\left( \frac { 1 } { 27 } \right) ^ { - 2 / 3 } - \left( \frac { 1 } { 9 } \right) ^ { - 1 / 2 }$$

• A) 6
• B) \(- \frac { 2 } { 9 }\)
• C) \(\frac { 1 } { 6 }\)
• D) Not a real number

---

Definitions:

Fear Conditioning

A behavioral paradigm in which organisms learn to predict aversive events, linking a neutral stimulus with a fear-inducing situation.

Aversive CS

A conditioned stimulus that predicts an unpleasant outcome, leading to aversive learning.

Neutral US

Refers to a stimulus that does not initially elicit a strong emotional or physiological response, used in behavioral conditioning experiments.

Conditioned Response

A conditioned reaction developed in response to a previously irrelevant stimulus after its frequent association with a stimulus that elicits an automatic response.