Table 2. Qualitative longitudinal research methods.

Planned data collection over study duration (7 years per participant).

Qualitative data collection methods and practices (repeated annually)	Sample size
Creative expression: Insights on how young people change their future aspirations, plans and ambitions over time. This will include an annual creative expression – written, spoken, filmed or pictorial from young people.	N = 100 (Y1 = 34; Y2 = 67; Y3 = 100)
	Total over study duration: 700
Group discussions (in groups of 8): To acquire information from diverse group of young people on a specific theme	N = 80 (Y1 = 27; Y2 = 54; Y3 = 80)
	Total over study duration: 560
Online/ digital content: To gather information through content analysis on everyday life and priorities of young people through online/digital sources like social media like TikTok, Instagram, BeReal, YouTube, Facebook, WhatsApp etc.	N = 50 (Y1 = 17; Y2 = 33; Y3 = 50)
	Total over study duration: 350
In-depth interviews: To explore in detail thoughts and feelings related to priority topics	N = 40 (Y1 = 14; Y2 = 27; Y3 = 40)
	Total over study duration: 280
Expressions through art, culture and youthful activism: To gain insights and familiarise with the imaginative worldviews of young people by collecting and analysing the artistic expressions produced, created and lived by them like drawing/sketches, poems, performances, music, environmental and political activism etc.	N = 25 (Y1 = 9; Y2 = 17; Y3 = 25)
	Total over study duration: 175
Portraits: To document young people's hopes and fears for the future through an annual interview and portrait session with a professional photographer.	N = 25 (Y1 = 9; Y2 = 17; Y3 = 25)
	Total over study duration: 175
Critical events: To gather in-depth understanding of everlasting impressions left on young people’s lives through critical events like entering into new school, changing family circumstances, pleasant or unpleasant peer experience, enhanced interest in particular sports, changes in food habits, puberty and sexuality, trauma, fight, drugs, poverty/unemployment or other life defining events like grief or happiness	N = 5 (Y1 = 1; Y2 = 3; Y3 = 5)
	Total over study duration: 35
Life history: To collect a cumulative record of changing perceptions and attitudes amongst young people on health and wellbeing and lived experiences with the outside world throughout adolescence, by drawing on all QLR methods of data collection, and secondary data.	N = 10 (Y1 = 2; Y2 = 6; Y3 = 10)
	Total over study duration: 10
Ethnography: To gather insights of social life of young people through participant and nonparticipant observation by taking part in various social gatherings of young people, and triangulation of data collected from various sources about their everyday lives.	N = 10 (Y1 = 2; Y2 = 6; Y3 = 10)
	Total over study duration: 10