Disturbed BEHAVIOUR of animals in an EXPERIMENT when they are faced with an impossible problem. This PHENOMENON was discovered by PAVLOV when he rewarded a dog with food for responding (by salivating) to a circle and then withheld the reward when the stimulus was an ellipse. Pavlov gradually made the two stimuli more and more alike. When the point was reached at which the dog could no longer discriminate the circle from the ellipse the animal lashed out in a frenzy of wild and random behaviour. Whether this behaviour can be equated with human NEUROSIS is a matter of long-standing dispute among psychologists.
The passage describes an experiment by Pavlov involving dogs and their response to increasingly similar stimuli, leading to a phenomenon of disturbed behavior when the stimuli become indistinguishable. It also mentions a debate about whether this behavior can be compared to human neurosis.
no_question
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
Disturbed BEHAVIOUR of animals in an EXPERIMENT when they are faced with an impossible problem. This PHENOMENON was discovered by PAVLOV when he rewarded a dog with food for responding (by salivating) to a circle and then withheld the reward when the stimulus was an ellipse. Pavlov gradually made the two stimuli more and more alike. When the point was reached at which the dog could no longer discriminate the circle from the ellipse the animal lashed out in a frenzy of wild and random behaviour. Whether this behaviour can be equated with human NEUROSIS is a matter of long-standing dispute among psychologists.
user
The passage describes an experiment by Pavlov involving dogs and their response to increasingly similar stimuli, leading to a phenomenon of disturbed behavior when the stimuli become indistinguishable. It also mentions a debate about whether this behavior can be compared to human neurosis.

TYPE: NO_QUESTION