When Keller and Marian Breland, Two Psychologists Who Became Animal

question 26

Multiple Choice

When Keller and Marian Breland, two psychologists who became animal trainers, decided that it would be cute to have a pig drop a big wooden coin into a box, they found that:

• A) food was not an effective reinforcer for the pig and so learning didn't occur.
• B) when given edible roots as reinforcers, the pig learned the task in fewer than 10 trials.
• C) the pig was difficult to train because it kept dropping the coin, rooting, and throwing the coin in the air.
• D) the pig showed intrinsic interest in the task and so reinforcement was unnecessary.

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Definitions:

Mean Weights

The average weight calculated by adding all the weights together and dividing by the number of weights.

Navel Oranges

A type of orange that is characterized by the growth of a second fruit at the apex, which protrudes slightly and resembles a human navel.

Standard Deviation

This quantifies how much data values diverge or scatter from the average.

Standard Deviation

A parameter quantifying the divergence or scattering of data points in a dataset, reflecting the distance of these points from the average.