Final answer:
Douglas who throws his spoon exhibits little scientist behaviors by testing and learning about his environment, akin to a scientist performing experiments.
Step-by-step explanation:
Among the examples given, Douglas, who throws his spoon off the highchair to see where it lands, is displaying behaviors most akin to a little scientist. This exploration is a part of sensory and motor development studied in developmental psychology. Through such actions, infants and toddlers learn about cause and effect and their impact on the environment. These behaviors mirror the basic principles of scientific investigation - forming a hypothesis, testing it through experimentation, and observing the outcomes.
Observation of toddlers as they engage with their environment provides critical insights into cognitive development. This is why Douglas's behavior is particularly relevant, as he is not merely playing but also learning about spatial relationships, gravity, and consequences through repeated experimentation with his spoon.