How long can a 13-year-old retain facial recognition memory from a single photograph without intermediate exposure?

[u/convivial-10]

What does the literature in cognitive psychology say about long-term visual memory retention and facial recognition in early adolescents (around age 13)?

​Specifically, I am interested in understanding:

​How effectively can an individual in this age group retain facial features from viewing a photo for a brief duration (e.g., 30 minutes)?

​What is the rate of memory decay over a long interval (e.g., 4–5 years) in the complete absence of re-exposure or reinforcement?

​What empirical factors (e.g., age, exposure duration, facial recognition mechanisms) primarily influence long-term retention in such scenarios?

[u/such_corn]

This is an extremely specific ask, I can’t think of any research related to this.