Examlex
The first step in any scientific investigation is __________.
Field Research
Data are collected by systematically observing people in their natural surroundings.
Public Opinion Polls
Surveys designed to collect information about the views and opinions of the general population on various issues.
Scientific Studies
Research investigations conducted following systematic methodology to discover or interpret new knowledge or applications in various fields of science.
Experiment
A carefully controlled artificial situation that allows researchers to manipulate variables and measure the effects.
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