Examlex
When children understand that rolling a ball of clay into a "snake" does not increase the amount of clay or that pouring liquid from a tall,narrow glass into a shallow dish does not reduce the amount of liquid,the children have developed
Double-blind Study
A scientific experiment where both the participants and the researchers do not know who receives the treatment or the placebo, eliminating bias.
Survey Research
A research method involving the collection of information from a sample of individuals through their responses to questions.
Independent Variables
are variables in an experiment that are manipulated by the researcher to observe their effect on dependent variables, crucial for establishing causal relationships.
Convenience Sample
A type of non-random sampling where participants are selected based on their availability and willingness to take part.
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