Expert in changing and predicting behavior; social big data; behavior change
Executive Director, University of California Institute for Prediction Technology (UCIPT);
Executive Director, UCLA Center for Digital Behavior;
UCLA Medical School Professor.
Stanford-trained, PhD in Psychology.
There is a huge range. We've done studies from as small as $10K, to as large as millions of dollars. Everything Stan said is true, there are many factors involved. Without knowing more information but guessing you're a small startup wanting to run something to validate your mobile app, I'd say you'd need about $15-20K along with the right research team.