if a psychologist gave one group of rats extra handling and an enriched environment and deprived a second…

if a psychologist gave one group of rats extra handling and an enriched environment and deprived a second group of rats, then measured how quickly each group learned a maze, he or she would be engaged in: correlational research. field research. naturalistic observation. a controlled experiment.

if a psychologist gave one group of rats extra handling and an enriched environment and deprived a second group of rats, then measured how quickly each group learned a maze, he or she would be engaged in: correlational research. field research. naturalistic observation. a controlled experiment.

Answer

Brief Explanations:

The psychologist has two groups with different conditions (extra handling/enriched environment vs. deprivation) and measures a variable (maze - learning speed). This setup is characteristic of a controlled experiment where variables are manipulated and outcomes are measured.

Answer:

a controlled experiment.