The Medium-term Effects of Home-based Early Childhood Development Intervention Impact Evaluation 2011, Midline Survey
Impact Evaluation Survey
The Medium-Term Effects of Home-based Early Childhood Development Intervention Impact Evaluation (ECDIIE) covered 96 small towns in central Colombia, representing a large number of small communities across a relatively big geographical area. It exploited structures in place from the government's Conditional Cash Transfer Programme, Familias en Accion (FeA), which targets the poorest 20% of households in the country.
There are currently three waves of data, a baseline, pre-intervention wave collected between February and June 2010, and a follow-up wave 18 months later between September and December 2011, at the end of the intervention period. The second wave of follow-up data collection occurred 2 years after the first follow-up data collection between September and December 2013.
The beneficiaries of FeA periodically elect a female representative, called the Madre Lider (ML). We randomly selected three from each town (municipality), and then from the families represented by the ML we randomly selected 5 children aged 12 to 24 months to be eligible for the intervention. Within each municipality, eligible households were randomly allocated (at the municipality level) to each of the following treatment arms:
2. Stimulation + Supplementation
The stimulation intervention consisted of weekly visits to the homes of the target children, each visit lasting around one hour. The home visitors received a three-week training programme in activities designed to stimulate children at different ages. They also received a weekly curriculum as a guide, and a set of locally produced materials (homemade toys from recycling material, picture books, puzzles, etc.).
The supplementation arm consisted of providing daily sachets of multiple micronutrient powder to mothers, via the home visitors, to add to the target child's food. Sachets were designed to provide iron (12.5mg), zinc (5mg), Vitamin A (300 µg retinol equivalent), Vitamin C (30mg) and folic acid (160 µg) for the children targeted.
Kind of Data
Sample survey data [ssd]
- v01: Edited anonymous datasets for public distribution.
The scope of the study includes:
- HOUSING AND HOME: Location and identification, Housing Characteristics, Distances, Expenses, Other revenues and transfers, Incidents in the past 18 months, Participation in “Familias en Accion”, Household structure and Food consumption of children in the household (for children between 6 months and 6 years).
- EDUCATION, WORK AND HEALTH (FOR PERSONS OVER AGE 5): Education, Health and Work.
- CHILDREN LESS THAN 6 YEARS: Institutional and non-institutional care, Nutritional status - growth and development, Home and Morbidity and Historical care arrangements.
- ANNEX FOR MODULE 3 - TARGET CHILD: Interaction with biological parents (if don't live at home), Bates temperament scale, Quality of home environment, Time use, MacArthur Bates results and Rothbart Infant behavior.
- BIOLOGICAL MOTHER: Time use, Empowerment, Family information, Contraception and reproductive history, Risk aversion, Inequality aversion, Knowledge of child development, Depression, Birth and breastfeeding of biological children, Physical development of biological children, Matching words to pictures and Haemoglobin.
- PRIMARY CAREGIVER: ID and location, Education, Health, Work, Time use, Knowledge of child development, Depression and Matching words to pictures.
- ANNEX FOR MODULE 3 - TARGET CHILD: Haemoglobin.
- MADRE LIDER / HOME VISITOR: ID, Household info, Education, Participation in “Familias en Accion”, Work, Knowledge of child development and Matching words to pictures.
Producers and sponsors
Economic and Social Sciences Research Council
Inter-American Development Bank
World Bank Group
International Growth Centre
The survey used a randomized experimental design to obtain rigorous and unbiased estimates of the impact of the stimulation and nutrition interventions, and of their interaction.
Dates of Data Collection
Data Collection Mode
Computer Assisted Personal Interview [capi]
Data Collection Notes
Six professionals were chosen among a number of applicants on the basis of their CV and an interview. They were trained in child development, home visiting and the curriculum for over one and a half months. The training also included practicing home visits in Soacha. These professionals, who will be referred to as “mentors” in what follows, then had the task to train the home visitors in the field – i.e. teach them the curriculum and the approach to home visiting – and mentor/supervise them throughout the intervention. To this end, each of them was assigned 8 towns, for a total of 24 home visitors each.
The training of the home visitors was split across two workshops. The first, lasting two weeks, covered the first part of the stimulation curriculum (activities for children ages 12 to 30 months) along with the fundaments of child development, the importance of adequate care and stimulation, and toy construction workshops. Once this first round of training was completed, the home visitors were deemed ready to start the visits. This process took place at the same time as data collection (being careful in each village to ensure data collection had taken place before the intervention started), from February through June 2010, so by the end of June 2010 the intervention was fully phased-in across all treatment villages. The second phase of the training workshops took place between mid August and mid October 2010 over a one week period. In these sessions, the home visitor and the mentor covered the second half of the curriculum (activities for children aged 30 to 42 months), revised lessons covered in the first workshop, resolved doubts, and discussed any outstanding issues.
After that, the six mentors became, for the rest of the intervention, mentors and supervisors of the home visitors. They traveled around each of their 8 towns, spending up to a week in each, overseeing visits of their assigned home visitors and providing them with advice, training, feed-back, and support. This rotation scheme is such that each home visitor received about a week of interaction with her mentor once every 4-6 weeks. Furthermore, mentors and home visitors are in touch on a regular basis: the home visitors receive weekly to fortnightly telephone calls to discuss progress and problems; they receive weekly text messages to reinforce key messages to be conveyed during home visits, and they receive monthly one-page bulletins that reinforce material covered during training sessions. Overall, the mentors have played a very important role in the intervention.
At follow up, it was collected a variety of developmental indicators, including the Bayley test (for cognitive, language and motor development), the MacArthur Communicative Development Inventories (for vocabulary and expressive language), the Bates Infant Characteristics Questionnaire (for temperament), and the Rothbart Infant Behaviour Questionnaires (for attention focusing, inhibitory control and sociability amongst other socio-emotional traits). These data were again complemented by an extensive socio-economic questionnaire which included information on parental investments, time use and so on.
Evaluation of Development Policy department
Institute for Fiscal Studies
Use of the dataset must be acknowledged using a citation which would include:
- the Identification of the Primary Investigator
- the title of the survey (including country, acronym and year of implementation)
- the survey reference number
- the source and date of download.
Orazio Attanasio, UCL. Colombia - Medium-term Effects of Home-based Early Childhood Development Intervention Impact Evaluation, Midline Survey (ECDIIE-ML) 2011. Ref. COL_2010_ECDIIE-ML_v01_M. Dataset downloaded from [url] on [date].
Disclaimer and copyrights
The user of the data acknowledges that the original collector of the data, the authorized distributor of the data, and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences based upon such uses.
DDI Document ID
Development Data Group
The World Bank
Documentation of the study
Date of Metadata Production
DDI Document version
Version 01 (December 2019)