= Matthew A. Killingsworth
{c}
<Matthew A. Killingsworth> studies thought and experience in everyday settings. With <Daniel T. Gilbert>, he used smartphone-based <experience sampling> to obtain repeated reports of current activity, thought and feeling. The study associated <mind-wandering> with lower reported <happiness>. Repeated observations reduce dependence on one distant retrospective summary, but observational associations still require care when assigning a unique causal explanation. <A Wandering Mind Is an Unhappy Mind by Matthew A. Killingsworth and Daniel T. Gilbert>[2010, smartphone experience-sampling study]{ref}
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