Inclusion Criteria:

• - A define diagnosis of multiple sclerosis (which will include clinically isolate syndrome, radiologically isolated syndrome and neuromyelitis optica spectrum disorder).

• - A performance below 1.5 or 2 standard deviations (SD) compared to the normative mean in at least 20-30% of the test parameters.

• - Corrected near vision of 20/70 or better (to see test material)

  Exclusion Criteria:

  - Exclude persons with a history of central nervous system disease other than MS.

• - Use of illicit drugs, phencyclidine (PCP), Lysergic acid diethylamide (LSD), stimulants, amphetamines, barbiturates, etc. (Cannabis use is accepted) - Psychotic symptoms, bipolar disorder, schizophrenia.

• - Exclude persons who have used steroids within the past 3 months.

• - Exclude persons unable or unwilling to travel to the Centre or requires transportation by ambulance.

Background: Multiple sclerosis (MS) is a chronic disabling disease of the central nervous system, with symptom onset commonly occurring between the ages of 20 to 40 years old; with females being at a higher risk of developing MS than men. Cognitive impairment (CI) in the last decade has been acknowledged as a prevalent core feature of the MS clinical picture, along with mobility issues. Cognitive impairment affects up to 44.5 % of people with relapsing remitting MS (RRMS), 79.4 % in secondary progressive MS (SP), and up to 91.3 % in people with primary progressive MS. The most prominent deficits reported being information processing speed, learning and memory and executive function. Cognitive decline has been found to directly affect the quality of life of people with MS, impacting participation in social activities, driving abilities, employment productivity, and task of daily living. Currently there is no approved medication for the treatment of CI in MS, patients and their clinicians are left with basically symptomatic treatments. In the last decade there has been an increase in developing non-pharmacological rehabilitation treatment to reverse or to at least slow down the progression of cognitive decline with cognitive rehabilitation. KEYWORDS Learning and memory; executive function; information processing speed; Goal Management Training; multiple sclerosis. Proposal and aims: Cognitive rehabilitation (CR) is designed to enhance a person's capacity to process and interpret information and improve their ability to function in all aspects of family and community life. Given the clear and consistent documentation of cognitive deficits in persons with MS, there is an obvious need for effective cognitive rehabilitation. A leading cognitive rehabilitation program called Goal Management Training® (GMT), has been used as an effective treatment for a variety of patient populations, including traumatic brain injury, stroke, schizophrenia, attention deficit hyperactivity disorder and multiple sclerosis for the treatment of cognitive deficits specifically executive function, learning & memory, and information processing speed. A doctoral dissertation completed by Nadine Richards (2013), under the supervision of Brian Levine, investigated the effectiveness of the GMT intervention for multiple sclerosis (MS) patients with impaired cognition; using a double-blinded randomized controlled trial, with treatment group employing the GMT intervention and the sham group employing a psycho-educational intervention. Twenty eight participants were recruited, and randomized; participants in the GMT intervention learned stepwise strategies ("Stop-State-Split") to keep track of their daily activities, which included mindfulness training to enhance attentional awareness and control. The results post-training, revealed that compared to the psycho-educational control group, the GMT group was associated with greater improvement on test of executive-attentional processes as well as functional task performance and observable cognitive functioning in daily life activities, with effects remaining visible at 6 months. As of date this remains the only study carried out on patients with MS using the GMT intervention. To elaborate further the GMT program, is a standardized metacognitive rehabilitation program designed to improve cognition. The GMT program contains 20 hours of training, that include employing the following tools psychoeducation, narrative examples mindfulness practice, and assignments completed both between and within sessions. The main objectives of the GMT intervention is to train individuals to periodically "STOP" what they are doing, attend to task goals, evaluate their performance, and monitor or check their performance as they proceed. The current version of GMT as mentioned above consists of 20 hours of training and its material and manual were made commercially available in 2012 by Baycrest Hospital (https://gmt.learnworlds.com/). The GMT cognitive rehabilitation training program is not considered a medical device and therefore not subject to Health Canada certification for use. As of April 20, 2023, the Goal Management program is now widely available through TELUS health's AbilitiCBT platform, and for clients across Canada and the United States (TELUS Health, 2023). Given the devastating effects of cognitive impairment on social functioning, occupational functioning and everyday life activities in people with MS (pwMS), the amelioration of cognitive deficits is likely to improve everyday functioning in pwMS, thus greatly reducing the impact of the disease on the lives of people with MS and the overall cost of the disease to society at large. Therefore, efforts to improve cognitive abilities in this population may result in significant improvements in overall quality of life (QOL). The currently proposed study seeks to do just that. The proposed pilot study will be a randomized controlled single-blinded trial with treatment and wait list control group. We aim to assess information processing speed, learning and memory, and executive function. The minimal assessment of cognitive function in MS (MACFIMS) will be utilized, to assess cognitive function. Additionally, the following PROs will be collected: the hospital anxiety and depression scale (HADS), the modified fatigue impact scale (MFIS), the multiple sclerosis impact scale (MSIS-29), and the European quality of life

• - 5 dimension - 5 level (EQ-5D-5L) scale, in order to capture level of, depression and anxiety, fatigue, impact of MS and quality of life.

Patients in the cognitive rehabilitation group will be treated by GMT for 5 weeks (2 hour sessions, twice per week). The wait list control group will be given usual care/ routine care which consist of being provided with a list of cognitive compensatory strategies to do on their own. Cognitive performance of all patients in both groups will be assessed at baseline, immediate post-5-week assessment, and at post 6 month follow-up assessment. We hypothesized that, compared to persons in the wait-list control group, the participants receiving the Goal Management Training would demonstrate significant improvements across all cognitive measures.

Arms

Experimental: cognitive rehabilitation group

will be treated by GMT for 5 weeks (two hour sessions per week, one day of rest in between).

No Intervention: wait-list control group

will be given a list cognitive compensatory strategies that they can do on their own to improve their memory.

Interventions

Behavioral: - Goal Management Training

The main objective of GMT intervention are to train individuals to periodically "STOP "what they are doing, attend to task goals, evaluate their performance and monitor or check outcomes as they proceed (Levine & Stamenova, 2017).