<p>A former Facebook Inc employee revealed herself on Sunday as the whistleblower who leaked a trove of internal company research that served as the basis of a Wall Street Journal investigative series.</p>.<p>The leak led to a Senate hearing and a new wave of criticism over the negative impact of the social media giant's apps.</p>.<p>Frances Haugen appeared on Sunday on the television program "60 Minutes". She will testify before a Senate subcommittee on Tuesday in a hearing titled "Protecting Kids Online," about the company's research into Instagram's effect on the mental health of young users.</p>.<p>Last week, a Facebook executive testified to US senators and disputed the Journal's characterisation of the research, pointing out other findings that she said showed the app's positive impact on teens.</p>.<p>Haugen was a product manager at Facebook for more than two years, according to her LinkedIn profile. She also worked as a product manager at Google, Pinterest and Yelp.</p>.<p>Haugen said she'd seen problems at other social media companies, but "it was substantially worse at Facebook than anything I'd seen before." </p>.<p><strong>Check out DH's latest videos</strong></p>
<p>A former Facebook Inc employee revealed herself on Sunday as the whistleblower who leaked a trove of internal company research that served as the basis of a Wall Street Journal investigative series.</p>.<p>The leak led to a Senate hearing and a new wave of criticism over the negative impact of the social media giant's apps.</p>.<p>Frances Haugen appeared on Sunday on the television program "60 Minutes". She will testify before a Senate subcommittee on Tuesday in a hearing titled "Protecting Kids Online," about the company's research into Instagram's effect on the mental health of young users.</p>.<p>Last week, a Facebook executive testified to US senators and disputed the Journal's characterisation of the research, pointing out other findings that she said showed the app's positive impact on teens.</p>.<p>Haugen was a product manager at Facebook for more than two years, according to her LinkedIn profile. She also worked as a product manager at Google, Pinterest and Yelp.</p>.<p>Haugen said she'd seen problems at other social media companies, but "it was substantially worse at Facebook than anything I'd seen before." </p>.<p><strong>Check out DH's latest videos</strong></p>