Psychometric properties of the Child Development Assessment Questionnaire (QAD-PIPAS) for use in population studies involving Brazilian children aged 0-59 months.

Objective: To analyze the psychometric properties of the Child Development Assessment Questionnaire (QAD-PIPAS).

Methods: This methodological study was comprised of two axes. The first one aimed to analyze the instrument's construct validity (discriminant and concurrent validity) and internal consistency, and the second one examined test-retest reliability, involving two different samples and procedures.

Development and validation of an instrument for monitoring child development indicators.

Objective: To create and validate an instrument for child development monitoring.

Methods: Methodological study, based on the World Bank's proposition to monitor child development indicators in low- and middle-income countries. The stages of the study included the following: development of an inventory of items for child development evaluation, based on open access instruments; content validation by a group of experts on the topic, using consensus techniques; selection of questions to describe children and their families; pre-test of the instrument during the vaccination campaign in 2016 in three municipalities, and conducting cognitive interviews.