The data were gathered by the following procedure, reported in the study. "Between January and June 1998, parents of children aged 2-16 years [ ... ] that were seen as outpatients in a university pediatric ophthalmology clinic completed a questionnaire on the child's light exposure both at present and before the age of 2 years." Was this study observational, or was it a controlled experiment? Explain.

Question

Caitlin Brown

Mathematics

20 December, 09:43

The data were gathered by the following procedure, reported in the study. "Between January and June 1998, parents of children aged 2-16 years [ ... ] that were seen as outpatients in a university pediatric ophthalmology clinic completed a questionnaire on the child's light exposure both at present and before the age of 2 years." Was this study observational, or was it a controlled experiment? Explain.

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Janitor · Answer 1

This was an observational study.

Step-by-step explanation:

Given is that parents of children completed a questionnaire on the child's light exposure both at present and before the age of 2 years.

This was an observational study since there is no treatment or control group.

We know that treatment, control groups or treatment groups are not specific to randomized control experiments.