You are what you tweet: Personality expression and perception on Twitter

Microblogging services such as Twitter have become increasingly popular in recent years. However, little is known about how personality is manifested and perceived in microblogs. In this study, we measured the Big Five personality traits of 142 participants and collected their tweets over a 1-month period. Extraversion, agreeableness, openness, and neuroticism were associated with specific linguistic markers, suggesting that personality manifests in microblogs. Meanwhile, eight observers rated the participants’ personality on the basis of their tweets. Results showed that observers relied on specific linguistic cues when making judgments, and could only judge agreeableness and neuroticism accurately. This study provides new empirical evidence of personality expression in naturalistic settings, and points to the potential of utilizing social media for personality research.     

The prevalence of suicidal behaviors, attitudes and associated social experiences in an urban population

The development of an epidemiological study of mental health, social background factors, suicidal behaviors (suicidal ideas, deliberate self-harm, and attempted suicide), values concerning suicide, and experience of suicide in others is described. 679 adult respondents in a stratified random sample of residents of a large Canadian city were interviewed. Results indicate a more accepting attitude to suicide than reported in previous studies; considerable experience of suicide in others; and a much higher rate of suicidal ideas and action than has been reported in previous work. Thirteen percent of the sample had made plans for suicide in their lifetime, 6% had deliberately harmed themselves, and a further 4% had attempted suicide in their lifetime. In the past year, 4% had made plans for suicide, and 2% had deliberately harmed themselves or had attempted suicide.     

Impact of elaboration on socially desirable responding and the validity of biodata measures

The current study investigated the impact of requiring respondents to elaborate on their answers to a biodata measure on mean scores, the validity of the biodata item composites, subgroup mean differences, and correlations with social desirability. Results of this study indicate that elaborated responses result in scores that are much lower than nonelaborated responses to the same items by an independent sample. Despite the lower mean score on elaborated items, it does not appear that elaboration affects the size of the correlation between social desirability and responses to biodata items or that it affects criterion-related validity or subgroup mean differences in a practically significant way.