1,280 research outputs found
Understanding Perceptions of Problematic Facebook Use: When People Experience Negative Life Impact and a Lack of Control
While many people use social network sites to connect with friends and
family, some feel that their use is problematic, seriously affecting their
sleep, work, or life. Pairing a survey of 20,000 Facebook users measuring
perceptions of problematic use with behavioral and demographic data, we
examined Facebook activities associated with problematic use as well as the
kinds of people most likely to experience it. People who feel their use is
problematic are more likely to be younger, male, and going through a major life
event such as a breakup. They spend more time on the platform, particularly at
night, and spend proportionally more time looking at profiles and less time
browsing their News Feeds. They also message their friends more frequently.
While they are more likely to respond to notifications, they are also more
likely to deactivate their accounts, perhaps in an effort to better manage
their time. Further, they are more likely to have seen content about social
media or phone addiction. Notably, people reporting problematic use rate the
site as more valuable to them, highlighting the complex relationship between
technology use and well-being. A better understanding of problematic Facebook
use can inform the design of context-appropriate and supportive tools to help
people become more in control.Comment: CHI 201
Performance of the Syva Direct Fluorescent Antibody Assay for Chlamydia in a Low-Prevalence Population
Chlamydia trachomatis is the most common reportable sexually transmitted disease (STD) in the
United States. In the 1980s, rapid diagnostic tests for chlamydia began to replace more cumbersome
tissue culture methods. Current data on rapid antigen detection assays demonstrate acceptable
sensitivity, specificity, and predictive values in populations with a high prevalence of chlamydia.
Few studies report the performance of these assays in a low-prevalence obstetric and gynecologic
(Ob/Gyn) population, This study compares the most commonly used direct fluorescent antibody
(DFA) assay (Syva Microtrak) with tissue culture (TC) in a low-prevalence population. Endocervical
specimens (775) were tested from women at risk for chlamydia infection, and the prevalence
was found to be 7.7%. The DFA assay demonstrated a sensitivity of 80% and a specificity of 97%
compared with TC. The positive and negative predictive values were 72% and 98%, respectively.
The results of this study indicate that the Syva DFA assay lacks the sensitivity and positive
predictive value for routine use in Ob/Gyn populations with a lowprevalence of C. trachomatis
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