Table 2 Core set of instruments used

  ▪ Relationship ability

MM instrument [36]

Evaluations of videos of dyadic interactions by researchers

●

●

●

  ▪ Affect

QUALIDEM positive and negative affect subscales [37]

Proxy rating by primary carer

●

●

●

  ▪ Behavioural and psychological symptoms in dementia (BPSD)

NPI [38]

Proxy rating by primary carer

●

●

●

  ▪ Sensitivity

SI [39]

Assessment of videos of dyadic interactions by researchers

●

●

●

  ▪ Stress experience due to BPSD

NPI-D [38]

Self-rating

●

●

●

  ▪ Manageability of BPSD

NPI-M [40]

Self-rating

●

●

●

  ▪ Goal attainment by intervention

GAS [41]

Self-rating

●

●

  ▪ Quality of relationship

QCPR scale [42, 43]

Assessment by primary carer

●

●

●

  ▪ Social Interaction^b

Videography of dyadic interaction in everyday life [44]

Videos, video transcripts and context information of researchers

●

●

●

  ▪ Benefits and perceptions of counselling

Quantitative interviews with 35 standardized single items

Primary carer

●

  ▪ Benefits and perceptions of counselling

Quantitative feedback questionnaire with standardized 11 single items

Primary carer

  ▪ Promoting and inhibiting factors, appropriateness for the target group, doses and frequency, quality of counselling, etc.

Guided telephone interviews

Marte Meo® Therapist

●

  ▪ Recruitment rate

Recruitment documentation

Researcher

  ▪ Recruitment, data collection, confirmation of bvFTD diagnosis

Field notes, documentation and memory protocols, reflections and observations on site

Researcher