Table 1.

Standard Protocol Items: Recommendations for Intervention Trials (SPIRIT) table

	Study period
	Enrolment	Allocation	Post allocation
Time point	Pre intervention	Time (t 0)	Centre baseline (t 1a)	Child baseline (t 1b)	Post intervention (t 2)
Enrolment
Eligibility screen	X
Initial centre contact	X
Centre informed consent	X
Allocation		X
Recruitment of children and parent informed consent		X
Intervention
PD intervention					X
Regular practice (control)					X
Assessments
Child assessments
DAS Verbal Comprehension				X	X
EYT Expressive Vocabulary				X	X
DAS Early Number Concepts				X	X
Early Numeracy Scales				X	X
Strengths & Difficulties (SDQ)				X	X
Child Self-Regulation (CSBQ)				X	X
Centre-level assessments
ECERS-E Environmental Rating			X		X
SSTEW Environmental Rating			X		X

PD professional development, DAS Differential Ability Scales, EYT Early Years Toolbox, SDQ Strengths & Difficulties Questionnaire, CSBQ Child Self-Regulation and Behaviour Questionnaire, ECERS-E Early Childhood Environment Rating Scale – Extended, SSTEW Sustained Shared Thinking and Emotional Wellbeing scale