Please assess the completion status of the following clinical trial:

Trial Title: Training Attentional Awareness and Control in ADHD

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Meet established Diagnostic and Statistical Manual-5 (DSM-5) criteria for ADHD predominately inattentive or combined subtype with clinically significant levels of impairment, diagnosed by structured clinical interview, the Mini International Neuropsychiatric Interview, and corroborating information~2. Clinical Global Impression-Severity (CGI-S) score ≥ 4 for ADHD~3. No lifetime history of DSM-5 bipolar disorder, psychotic disorder, pervasive developmental disorder, obsessive-compulsive disorder, substance abuse, or substance dependence (except nicotine) as assessed with the Mini-International Neuropsychiatric Interview (MINI)~4. Able in the opinion of the investigator to complete all required study procedures.~Exclusion Criteria:~1. History of diagnosis of childhood disorder other than ADHD (e.g. autism, dyslexia)~2. History of any general medical condition likely to require chronic use of medication with identified Central Nervous System (CNS) effects suspected to alter cognitive performance~3. History of seizure disorder, brain tumor, other major neurological disorder or head injury resulting in loss of consciousness~4. Serious oxygen deprivation~5. Current psychopathology requiring ongoing treatment with antipsychotic medications, mood stabilizers, benzodiazepines, or anticonvulsants~6. Current untreated psychopathology which is rated to be primary in terms of severity (greater than ADHD severity)~7. Current treatment with guanfacine.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 40 Years
- Healthy Volunteers: f

Study Arms:
- Active - SAC (Type: EXPERIMENTAL): Behavioral learning by using the Sustained Attention Control (SAC) Method's mobile software to increase sustained attention skills and self-awareness of attention control.
- Control - Scrabble (Type: ACTIVE_COMPARATOR): Behavioral learning using the mobile software game Scrabble to exercise word processing and executive control functions.

Based on this trial design, predict the completion outcome and termination type (if applicable).