Table 7.

Illustrative quotes from the free-text section in the study-specific questionnaire

Item		Quotes
Likable	Positive aspect	‘It makes it feel like I have started to unravel my problems and come closer to a solution.’
	Negative aspect	‘I experienced extreme anxiety by only starting to write down my problems.’
Easy to understand	Positive aspect	‘Good structure and good examples that make it easy to understand what to expect.’
	Negative aspect	‘I am not fully certain about how and what to write in each step. This makes it difficult for me, but it probably has more to do with me than the intervention.’
Relevant examples	Positive aspect	‘Most of the examples are highly relatable.’
	Negative aspect	‘The examples are definitely relevant, but I would like to see more examples of what to do if something is out of one's control.’
Overwhelmed	Positive aspect	‘The information is well-distributed across each part of the intervention, and to only gain access to one step at a time makes it feel less overwhelming. One is automatically forced to do one thing at a time, since anything else is simply not possible.’
	Negative aspect	‘I panicked about the stepwise access of the different parts of the content and not being able to look at forthcoming steps before I got there.’
Suggestions of possible improvements		‘Push notifications or daily reminders concerning one's ongoing problem-solving attempts.’ ‘An overview of all the solutions I have chosen to try.’