Table 3.

Example matrix for change objectives aiming at establishing a healthy diet (behavior)

Performance objectives	Change objectives	BCTs	Theory	Practical application	S/SB/B
PO 1. Have a regular eating pattern	OE 1.1. Identify their current eating pattern	Feedback on behavior	CT	From a list of 7 different eating patterns, the person picks the one that applies to them and reads feedback based on their choices	B
	KN 1.1. Recognize the benefits of regular eating and breakfast	Information about health consequences	SCT	Verbal and written explanation that regular eating can regulate hunger and that breakfast can improve cardio metabolic risk	SB
	SE 1.1. Express confidence in their ability to start following a regular eating pattern and eating breakfast regularly	Habit formation	SCT	Be prompted to start eating at the same time each day	SB
	SE 1.2. Express confidence in eating regularly	Problem solving and social support (unspecified)	SCT	Identify barriers to eating regularly during the previous week	S
				Generate strategies (as a group) to overcome barriers and increase facilitators to regular eating	S
	GO 1.1. Be prompted to increase the difficulty of their goals slowly until behavior is performed	Graded tasks	SCT	Be prompted to make behavioral changes in the following order • Changes towards PO 1 • Changes towards PO 2 • Changes towards PO 3	SB
	GO 1.2. Set a regular eating goal	Behavioral goal setting	SCT	Set a SMART regular eating goal based on GO 4.1.	S

Determinant-specific change objectives target each performance objective (PO). The determinants were outcome expectations (OE), knowledge (KN), self-efficacy (SE), and goals (GO). The BCTs and practical applications are present only in the sessions (S); both in the sessions and the booklet (SB); or only in the booklet (B). BCTs: Behavior Change Techniques, CT: Control Theory, SCT: Social Cognitive Theory