The sexual behaviour referred to turned out to be sexual misbehaviour by the standards of the time and on a widespread scale.

The behaviour shown in the first figure refers to a perfectly elastic material, such as steel.

Hyperactive behavior usually refers to a group of characteristics.

But, to repeat, the people engaged in the behavior referred to rarely use such terms at all.

However, there is some evidence that this behavior does not refer to the predators themselves but to threat, distinguishing calls from words.

Helping behavior refers to voluntary actions intended to help the others, with reward regarded or disregarded.

In the area of language skills, internal behaviour refers to listening and reading.

Finally, rule-based behavior refers to the tendency that exceptions in the rule construct could lead to weaknesses.

In computer programming, undefined behavior refers to computer code whose behavior is unpredictable.

Externalizing behaviors refer to delinquent activities, aggression, and hyperactivity.