Psycholinguistic techniques have been used to compose a "threat dictionary," whereby every word in a message is assigned, by computer, to a specific category. Words as they are used in the threat message are then compared with those words as they are used in ordinary speech or writings. The vocabulary usage in the message may yield "signature" words unique to the offender. What is the purpose of using psycholinguistic techniques to compose a "threat dictionary"?
1) To identify the unique vocabulary usage of an offender in a threat message
2) To compare the vocabulary usage in a threat message with ordinary speech or writings
3) To assign every word in a threat message to a specific category
4) To compose a dictionary of words used in threat messages