A Researcher Conducts an Experiment in Which Rats in One

question 38

Multiple Choice

A researcher conducts an experiment in which rats in one group (Group 1) receive 10 learning trials in which they receive a shock after a light is lit. Another group of rats (Group 2) receives the same 10 trials in which the shock is paired with the light, but they also receive 10 additional random trials in which the light is not followed by a shock. According to the expectancy model of classical conditioning, we would expect the tone to become a conditioned stimulus for fear for the rats

• A)only in Group 1
• B)only in Group 2
• C)in both Group 1 and Group 2
• D)in neither Group 1 nor Group 2

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Definitions:

Parapatric Speciation

Parapatric speciation is the evolution of new species within a spatially extended population that still has some gene flow.

Allopatric Speciation

The evolution of new species after populations have been separated geographically, preventing gene flow between them.

Sympatric Speciation

The evolution of new species within a contiguous population that still has extensive gene flow.

Gametic Isolation

A type of prezygotic barrier where the gametes (egg and sperm) of two different species fail to unite or fertilize, preventing the formation of a zygote.