Beyond the Text: Understanding Opt-Out, Dosage, and Response Disparities in an SMS Intervention
Abstract
Texts4Teens is an intervention designed to boost parental engagement in their child’s middleschool education through text messages. Conducted over multiple school years across eight
different Texas districts, parents were randomized into a treatment group, receiving three weekly
texts with engagement tips, and a control group receiving bi-weekly messages unrelated to
engagement. This study explores variations in intervention opt-out rates, dosage, and response
rates, particularly focusing on how sociodemographic characteristics influence engagement with
the intervention. Our analysis relies on both administrative records as well as text response data. We use ChatGPT to help analyze common themes found within the text message curriculum, to
see if those themes might also influence opt-out behaviors. The findings reveal that parents in the treatment group were more likely to opt out, while non-White, Spanish-speaking, and low-
income parents opted out less frequently and engaged differently with the content. These results
highlight the complex dynamics of text-based nudge interventions and emphasize the importance
of considering sociodemographic factors in designing and evaluating such programs.