Differences in linguistic and psychological characteristics between suicide notes and diaries

Area of Science:

• Psycholinguistics
• Forensic Linguistics
• Clinical Psychology

Background:

• Understanding the linguistic and psychological markers in suicide notes is crucial for suicide prevention and intervention strategies.
• Previous research has explored linguistic features of suicide notes, but comprehensive comparative analyses with non-suicidal writings are limited.

Purpose of the Study:

• To investigate and compare linguistic and psychological differences between suicide notes and personal diaries of non-suicidal individuals.
• To identify specific language patterns associated with suicidal ideation.

Main Methods:

• Analysis of 56 suicide notes and 56 personal diary entries from non-suicidal individuals.
• Utilized the Korean Linguistic Inquiry and Word Count Program to assess linguistic and psychological variables.
• Comparative analysis of sentence structure, word usage (pronouns, modifiers, numerals, affixes/suffixes), and emotional tone.

Main Results:

• Suicide notes exhibited longer sentences with more first- and second-person pronouns compared to diaries.
• Suicide notes contained fewer modifiers, numerals, and affixes/suffixes indicative of logical elaboration.
• Writings in suicide notes showed a higher frequency of negative emotion words and sadness/depression-related terms, and fewer positive words and future tense verbs.

Conclusions:

• Significant linguistic and psychological distinctions exist between suicide notes and personal diaries.
• The identified linguistic patterns in suicide notes may serve as potential indicators for psychological distress and suicidal intent.
• Further research is warranted to explore the practical applications of these findings in mental health contexts.