AP Psychology AAQ on Summary of Rosenzweig, M. R., Bennett, E. L., & Diamond, M.

1. Introduction:

Rosenzweig, Bennett, and Diamond's 1972 study explored the hypothesis that environmental enrichment induces structural alterations in the brain. They posited that exposing rats to enriched environments would lead to observable changes in brain anatomy and function, reflecting the brain's plasticity in response to experience. This hypothesis guided their investigation into the effects of environmental stimulation on brain structure.

2. Participants:

5

The study utilized laboratory rats as participants, randomly assigned to either enriched or standard environments. Rats in the enriched environment group were provided with stimulating activities such as toys, mazes, and social interaction, while those in the standard environment group were housed under typical laboratory conditions without additional enrichment.

3. Methods:

Rosenzweig, Bennett, and Diamond employed a controlled experimental design to assess the impact of environmental enrichment on brain structure. They ensured consistent exposure to stimulating activities for rats in the enriched environment. After a designated period, the researchers conducted neuroanatomical analyses to compare brain structures between rats in enriched and standard environments.

10

4. Results:

The study revealed significant differences in brain anatomy between rats in enriched and standard environments. Rats exposed to environmental enrichment exhibited 50% greater cortical thickness, increased synaptic density, and larger neurons compared to those in standard conditions. Statistical analyses confirmed robust differences between the two groups, underscoring the profound effects of environmental stimulation on brain structure.

Th researchers  provided appropriate housing conditions, minimizing distress or discomfort, and adhering to ethical principles for the humane treatment of laboratory animals. These ethical considerations underscored the researchers' commitment to responsible research practices and animal welfare.