Table 2 List of pre- and post-intervention measures

Language measures:

1. Comprehensive Aphasia Test [43]

This language battery provides a profile of performance across all modalities of language production and comprehension.

Communication measure:

1. Video recordings of conversation samples

This informal measure adapted from the Aphasia Conversation Measure [21] identifies barriers and facilitators to conversation between the person with PPA and their CP and assesses changes in conversation after intervention

Quality of life measures:

1. Dementia Quality of Life Measure [44]

This questionnaire is designed to ask people with dementia to rate their quality of life across the three main domains of feelings, memory and everyday life.

2. The Aphasia Impact Questionnaire [45]

A tool designed to measure the impact of living with aphasia across three domains of communication, participation and emotional well-being.

3. Communication Confidence Rating Scale for Aphasia [42]

This is a questionnaire of communication confidence that uses a self-rating scale designed for people with aphasia.

4. Perceived Stress Scale [46] (completed by CP only)

This is a self-report questionnaire for measuring the respondent’s perception of stress.

5. Zarit burden interview [47] (completed by CP only)

This is a caregiver self-report questionnaire for measuring personal and care strain.