Sixty-six adolescents with patellofemoral pain were randomized to receive physical therapy with the addition of a short psychological informative video (n=34) or a control video (n=32). The primary outcome of interest was the Anterior Knee Pain Scale (AKPS). Secondary outcomes of interest included pain on a Numeric Pain Rating Scale (NPRS), and psychological beliefs outcomes (Modified Fear Avoidance Beliefs Questionnaire - Physical Activity [FABQ-PA] subscale; Tampa Scale for Kinesiophobia [TSK-11]; Pain Catastrophizing Scale-Child [PCS-C]). Pain and function were assessed at 2 weeks, 6 weeks and 3 months follow up, whilst psychological beliefs outcomes were assessed at 2 weeks follow-up. Results revealed no significant differences in AKPS or NPRS scores between the two groups. Psychological beliefs outcomes, however, were significantly improved in the psychological video group.