Table 2.

Inclusion and exclusion criteria.

Inclusion	Exclusion
Studies involving adults with a diagnosis of MND (any subtype: Amyotrophic Lateral Sclerosis, Progressive Bulbar Atrophy, Primary Lateral Sclerosis, Progressive Bulbar Palsy)	Studies which do not involve patients with a diagnosis of MND (any subtype)
Studies utilising any form of electronic or digital speech assessment to evaluate the acoustic elements of speech, whose output is used in the diagnosis of MND, or to evaluate the progression of MND	Studies involving populations below 18 years of age
Not limited by study design (clinical trials, case-control study, case report, cohort study, case series)	Studies involving animal populations
Not limited by study setting (hospital wards, outpatient clinics, rehabilitation centres, nursing or residential homes or the patient’s own home)	Studies using devices which do not assess speech but another symptom of MND (e.g. spinal symptoms)
	Studies involving electronic speech devices with the purpose of speech augmentation not assessment
	Studies where MND (any subtype) is not the primary cause of speech dysfunction
	Studies involving devices where the acoustic elements of speech are not the main focus of assessment (e.g. those assessing kinematic elements of speech production)
	Review articles