3. Test Visits (Weeks 0, 2 and 4): All of these sessions will be held at times that suit participants' individual needs. The timings of the testing sessions will be consistent for each participant over the 4 weeks. Upon arrival, participants will be asked of any adverse events and any issues with compliance. Participants will then complete the battery of cognitive tasks consisting of (i) Modified Eriksen Flanker task, (ii) The Keep track task (KTT) and (iii)The Controlled Oral Word Association Test (COWAT), in addition to completing the daily mood measure Positive and Negative Affect Schedule (PANAS). Additionally, the last test session (week 4) participants and parents' will once again be asked to complete the MFQ, RCADS and RRS mentioned above.