Please select the eligibility criteria that correspond to the clinical trial below.
Title: Comparing the Efficacy of Methylphenidate, Dextroamphetamine and Placebo in Children Diagnosed With ADHD
Brief Summary: The study compares the efficacy of methylphenidate, dextroamphetamine and placebo on neuropsychological functioning and behavioral symptoms in 36 children diagnosed with ADHD within a double-blind cross-over design over six weeks. The assessment of ADHD followed formalized guidelines and a diagnosis of ADHD was based on DSM-IV criteria. A neuropsychological testbattery and four behavioral questionnaires were selected as efficacy variables. The neuropsychological testbattery includes Qb-test (visual attention, inhibitory control, motor activity), Score (auditory attention), Stroop Test (processing speed, inhibitory control) and Grooved Pegboard (motor speed). The participants were tested once on each type of medication. The four questionnaires are: a)Side-Effects Rating Scale (completed by a parent at the end of each of the six weeks), b)Self-Report Questionnaire (completed by the child at the end of each of the six weeks), c)Parent and Teacher Questionnaire(completed by a parent and a teacher Monday till Friday through every week), Test Performance Questionnaire (completed by the child immediately after each of the three test sessions).

Main hypothesis: A trial including both dextroamphetamine(Dex) and methylphenidate(Met) will provide better results than a trial including only Met. a)Met and Dex are efficient as treatment for ADHD compared to placebo, albeit Dex has moderately better effect compared to Met. b)At an individual level some of the participants will show positive response to one type of stimulants and no response, mixed response or adverse response to the other type of stimulant. c)Neuropsychological tests and behavioral questionnaires are moderately in agreement but also add unique information in the assessment of the effect of stimulants. d)Qb-test is sensitive and valid as a measure of the effect of stimulants.


Options:
A: Inclusion Criteria:

* ADHD

Exclusion Criteria:

* Psychosis
* Tourette syndrome
* Intelligence quotient (IQ) \< 70
* Pervasive developmental disorder (PDD)
B: Inclusion Criteria:

-

Patients must have:

Rigorously diagnosed Attention Deficit Hyperactivity Disorder (ADHD).
C: Inclusion Criteria:

* Male and female outpatients 6 to 12 years of age.
* Diagnosis of Attention Deficit Hyperactivity Disorder (ADHD), by DSM-IV, as manifested in clinical evaluation and confirmed by structured interview.
* Participation in structured morning routine (e.g. school, camp, or other organized activities).

Exclusion Criteria:

* Mental retardation (IQ \<75).
* Subjects with a medical condition, or treatment that will either jeopardize subject safety or affect the scientific merit of the study.
* Subjects with moderate to severe dermatological atopy.
* Subjects with known structural cardiac abnormalities.
* Organic brain disorders.
* Seizure Disorder.
* Subjects with Tourette's syndrome, or a history of psychosis or bipolar disorder.
* Subjects with current comorbid psychopathology that in the investigator's opinion will warrant immediate treatment or will interfere with the safe execution of the protocol (i.e. Anxiety or Major Depressive Disorder rated as moderate on CGI).
* Subjects with a history of intolerable adverse effects or non-response to methylphenidate.
* Pregnant or nursing females.
D: Inclusion Criteria:

* Age from 9.0 to 14.0.
* ADHD diagnosis following assessment at a child \& adolescent outpatient clinic.
* Clarification for stimulant treatment.

Exclusion Criteria:

* Moderate or severe mental retardation.
* Psychosis.
* Proven brain damage.
* Sensory deficits and/or motor impairments that make the individual in question unsuitable for the relevant tests.
* Epilepsy.
* The child has previously been prescribed stimulant medication or is being treated with such medication.
* The child commutes between parents or there are other factors that substantially reduce the possibility of obtaining reliable observations from parents (The child needs to live in one place through out the whole trial since otherwise might severely influence the child's behaviour and the observations).

Answer: D