PSY 357 Topic 8 Lifespan Development – Developmental Periods For each developmental period, discuss the physical, socioemotional, and cognitive developmental theories, and identify the theorists. Include any concerns/issues that might arise during each developmental period. psy 357 topic 8 Each description should be a minimum of 50 words with two to three outside references, not including your textbook, for each developmental period. You will add information to the chart as you study and research each developmental group throughout the course. You will summarize your information each week in discussion questions. Plan your time accordingly for the DQ deadline. The entire chart, filled out completely, is due to your instructor at the end of Topic 8.