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Adult ADHD Assessments

Assessment services are supervised by a licensed member of the College of Psychologists of Ontario and clients will be issued a receipt to submit to their insurance company upon payment.



The Adult ADHD assessment includes a detailed developmental history and a clinical evaluation of the individual's cognitive, social, and emotional functioning. The Adult ADHD Assessment involves interviews, comprehensive questionnaires, administration of a cognitive abilities test, administration of a continuous processing test, and clinical observation. Our questionnaires and interviewing process are designed to differentiate between ADHD and other disorders with overlapping symptoms.


Attention Deficit Hyperactivity Disorder, also called ADHD, is characterized by developmentally inappropriate levels of inattention, impulsivity, and hyperactivity. There are three types of ADHD that are recognized in the most current version of the Diagnostic and Statistical Manual (DSM-5) that Psychologists use to diagnose ADHD:

ADHD Predominantly Inattentive Presentation:

  • Fails to give close attention to details or makes careless mistakes

  • Has difficulty sustaining attention

  • Does not appear to listen

  • Struggles to follow through with instructions

  • Has difficulty with organization

  • Avoids or dislikes tasks requiring sustained mental effort 

  • Loses things

  • Is easily distracted

  • Is forgetful in daily activities 


ADHD Predominantly Hyperactive-Impulsive Presentation:


  • Fidgets with hands or feet or squirms in chair 

  • Has difficulty remaining seated 

  • Runs about or climbs excessively in children; extreme restlessness in adults

  • Difficulty engaging in activities quietly 

  • Acts as if driven by a motor; adults will often feel inside as if they are driven by a motor

  • Talks excessively 

  • Blurts out answers before questions have been completed 

  • Difficulty waiting or taking turns

  • Interrupts or intrudes upon others 

ADHD Combined Presentation:

  • The individual meets the criteria for both Inattentive and Hyperactive-Impulsive presentations.

*ADHD symptoms can change over time, but symptoms must be present prior to age 12 and not better explained by other disorders with overlapping symptoms (e.g., symptoms of anxiety also include difficulty with concentration, memory impacts, and restlessness).



The first step for assessment is completion of questionnaires as well as an initial interview to identify concerns and to collect important background information (including developmental, medical, and educational/work history).nt. Time during this session may also be used to clarify/discuss with client any questions related to their intake and questionnaire responses.


The individual is then seen for a 3-hour assessment session during which the clinician will administer a cognitive abilities test, a continuous processing test, and a personality assessment inventory

Following completion of the initial interview and testing sessions; all data is scored, analyzed, and integrated.

The client will then attend a feedback session during which the clinician will share the confidential assessment results, answer questions about the results and how they were determined and provide information about possible interventions and 'next steps'. It may be helpful to bring a family member or trusted individual with you to help you recall important details about the information provided during the feedback session.

The feedback interview is followed by the presentation of a confidential and comprehensive written report which summarizes all results and provides specific recommendations. This final report is designed to be shared by the client (if they choose) with other professionals like medical doctors or therapists.

The ADHD assessment involves an approximate total of 9.5 hours of billed time as follows:

  • Intake Interview and Questionnaire Forms (2 hours)

  • Approximately 3 hours of formal assessment​

  • Feedback interview (1 hour)

  • Report writing (3.5 hours)


Please note that a 48-hour notice of cancellation is required to avoid a cancellation penalty.

Payment is required at the time of each session and receipt for the provision of psychological services to present to your insurance company will be given when payment is received. 

After the assessment is completed, additional consultations and letters will be billed at an hourly rate.

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