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The steadily increasing size of the retinal image of an approaching object is especially important for perceiving the object's
Confounding Variables
External factors that can affect the outcome of an experiment, making it difficult to determine the exact cause of the observed effects.
Death Rates
The frequency at which deaths occur in a particular population, typically expressed per 1000 or 100,000 individuals per year.
Double-Blind Procedure
A research method in which neither the participants nor the experimenters know who is receiving a particular treatment, used to prevent bias in experimental results.
Correlation
A mutual relationship or connection between two or more things, where changes in one variable might be associated with changes in another.
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