Meta: Questions Twenge Expert Testimony in Teen Mental Health Trial

• A social psychologist testified that daily social media use likely caused increased depression, self-harm, and suicide in adolescents between 2010 and 2023.
• Meta's attorney challenged the expert testimony, questioning the specific causal link, the lack of distinction between apps, and the interpretation of statistics.
• The trial, presided over by Chief U.S. District Judge Yvonne Gonzalez Rogers, is the first in a multidistrict litigation involving over 3,000 cases against Meta.
• States allege Meta violated COPPA by failing to obtain parental consent for users under 13 and made deceptive statements violating consumer protection laws.
• Potential penalties for Meta could reach $200 billion and significantly alter how the company manages teen accounts.

The central legal challenge in this Meta social media liability trial revolves around establishing a direct causal link between the company's platforms and the reported teen mental health social media harms.

During the third day of a high-profile trial pitting four U.S. states against tech giant Meta, a social psychologist presented extensive findings linking daily social media use to diminished psychological well-being in adolescents. Dr. Jean Twenge, a distinguished professor, researcher, and author from San Diego State University, spent nearly four hours on the stand. Her expert witness testimony highlighted how scientific studies she reviewed indicated a rise in depression, self-harm, and suicide among young people between 2010 and 2023, with some studies showing increases of up to 5% in cohorts of 100,000 individuals.

Dr. Twenge's analysis specifically pointed to girls aged 10 to 17 experiencing the most significant surge in negative mental health effects, including a greater propensity for self-harm through methods like cutting or medication, directly correlated with increased technology and social media engagement. She further illustrated, using graphs presented to the jury, that while boys historically had higher suicide rates than girls, this trend reversed during the 2010s, with girls' rates increasing more substantially. When questioned by J. Christian Lewis, Chief of the Division of Consumer & Senior Protection under the Kentucky Attorney General’s Office, about the impact of teens spending over two hours daily on social media, Dr. Twenge explained that this time inevitably displaces other crucial activities, leading to sleep deprivation from late-night smartphone use and reduced in-person social interactions, which she characterized as "a terrible formula for mental health."

However, Meta's attorney, Paul Schmidt, vigorously challenged Dr. Twenge's conclusions during cross-examination. Schmidt repeatedly pressed her on the specific causation between social media and declining teen mental health, referencing the Bradford Hill criteria, a framework for evaluating causal associations. He pointed out that Dr. Twenge's research did not differentiate between specific social media applications and sometimes failed to distinguish between social media use and other forms of technology use, such as gaming. Schmidt also reinterpreted her statistics, suggesting that if 20% of surveyed teens reported unhappiness after two hours of social media use, then 80% must have been content or unaffected, implying a lack of direct negative impact.

Schmidt directly questioned Dr. Twenge, asking, "You understand there is a difference in something that may be cause and something that is the cause?" While she affirmed her understanding, she consistently emphasized that the data required a broader contextual interpretation to fully grasp its implications.

This trial, presided over by Chief U.S. District Judge Yvonne Gonzalez Rogers, marks a pivotal moment as it is the first in a multidistrict litigation (MDL) encompassing over 3,000 active cases against Meta. The current proceedings involve four lead states—California, Colorado, Kentucky, and New Jersey—with an additional 25 states that filed lawsuits against Meta in 2023 slated for future trials. The states contend that Meta has violated the Children’s Online Privacy Protection Act (COPPA), a federal statute mandating verifiable parental consent for users under 13 years of age.

Beyond COPPA violations, the lead states allege that Meta's leadership engaged in deceptive practices, making misleading statements about its platforms that ultimately deceived the public and contravened consumer protection laws. An eight-person jury is currently hearing the evidence and will provide an advisory verdict to Judge Rogers. As a Barack Obama appointee, Judge Rogers will ultimately render the final decision in the case, including any potential penalties.

The central legal challenge in this Meta social media liability trial revolves around establishing a direct causal link between the company's platforms and the reported teen mental health social media harms. The rigorous cross-examination of Jean Twenge expert witness testimony by Meta's legal team underscores the difficulty in proving specific causation, particularly when dealing with complex behavioral and psychological outcomes. The defense's focus on the Bradford Hill criteria and the distinction between a potential cause and the definitive cause highlights the high bar for demonstrating liability in such cases.

This debate over causation is critical for future tech liability litigation, as it will set precedents for how expert testimony on the causal relationship between digital platforms and user harm is evaluated. The defense's strategy of questioning the granularity of the research—specifically, the lack of distinction between individual apps or between social media and other technology—aims to introduce reasonable doubt regarding the direct culpability of Meta's specific platforms. The outcome of this aspect of the trial will significantly influence how future claims of harm from social media are adjudicated.

The stakes in this trial are exceptionally high, with potential penalties for Meta reaching up to $200 billion. A finding of liability could also fundamentally alter how Meta manages accounts for its younger users, potentially leading to significant operational changes. The trial is projected to continue for six to eight weeks, with expectations of testimony from several high-profile witnesses, including Meta CEO Mark Zuckerberg.

The implications extend far beyond this specific case, as the multidistrict litigation Meta faces involves thousands of similar claims. The manner in which Chief Judge Yvonne Gonzalez Rogers ultimately rules on the evidence, particularly regarding the causal link between social media and adolescent mental health, will have profound effects on the entire tech industry. It will shape future regulatory efforts, consumer protection enforcement, and the legal landscape for companies developing platforms used by minors, especially concerning compliance with laws like COPPA.

This trial's handling of expert testimony on social media's causal link to teen mental health issues will be critical for future tech liability litigation. Lawyers should observe how causation is established or challenged, and compliance officers should note the potential for significant penalties and implications for COPPA and consumer protection compliance.

Source: Original reporting via Courthouse News Service